Mold Locating Rings, Reviewed Before Machining
Send your drawing for mold locating rings with DFM, critical-dimension review, process planning, and inspection aligned to your requirements.
Representative Components From Related Tooling Work
Related Component Families and Drawing-Based Quotation
Why Engineering Teams Specify SUUXIANG Mold Locating Rings
Drawing-led review connects machine interface requirements, process planning and inspection evidence before production commitments are made.
Drawing Review First
We review drawings, models, material requirements and application context to identify questions before quotation and production planning.
DFM for Machine Fit
Platen recess, sprue-bushing interface, mounting details and machining access are reviewed to support a practical locating-ring design.
Critical Dimensions Defined
Critical diameters, heights, concentricity and datum relationships are clarified so manufacturing and inspection share the same priorities.
Process Routes Planned
CNC machining, EDM, grinding and fitting are selected according to geometry, material condition, surface requirements and tolerance strategy.
Inspection Planning Aligned
Inspection methods and reporting expectations are agreed against the drawing and verified plan, with documentation matched to the order.
Revision Control Visible
Controlled communication keeps drawing revisions, technical decisions and delivery information visible throughout the manufacturing workflow.
Precision Mold and Machined Component Families
Drawing-driven process routes for configurable tooling components, custom parts, and controlled inspection requirements.

CNC Machining Services
Precision CNC machining services for drawing-based components requiring coordinated milling, turning, EDM, grinding, fitting, and inspection. RFQs should identify critical dimensions, material condition, quantity, surface requirements, and delivery priorities before the process route is confirmed.
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CNC Milling
Custom CNC milling services for prismatic parts, plates, inserts, pockets, and complex machined features. Drawing review considers datum structure, cutter access, internal corners, machining allowance, clamping strategy, and the dimensions requiring inspection.
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CNC Turning
Precision CNC turning services for shafts, pins, bushings, sleeves, rings, and rotational features. Provide diameters, concentricity or runout requirements, material and heat-treatment condition, surface criteria, and mating relationships so turning and secondary operations can be planned correctly.
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5-Axis Machining
5-axis CNC machining supports multi-face geometry, angled features, contoured surfaces, and reduced re-clamping where the part geometry justifies it. Feasibility depends on tool access, workholding, datum strategy, material, tolerance requirements, and inspection approach.
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Swiss & Micro Machining
Swiss machining and micro machining support small-diameter, slender, and detail-intensive components such as pins, micro shafts, and connector-tooling features. Review focuses on material behavior, feature proportions, tolerances, burr control, handling, and measurement method.
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Wire & Sinker EDM
Wire EDM and sinker EDM services address hardened materials, narrow slots, sharp internal geometry, intricate profiles, and features inaccessible to conventional cutting tools. Electrode strategy, wire path, flushing, recast-layer considerations, and finishing requirements should be agreed before production.
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Precision Grinding
Precision surface and profile grinding supports controlled flatness, parallelism, profile accuracy, and finished dimensions after machining or heat treatment. Drawings should define datums, grinding stock, surface requirements, critical relationships, and inspection expectations.
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Mold Core & Cavity Inserts
Precision mold core and cavity inserts are configurable around the molding geometry, material, heat-treatment sequence, cooling or venting needs, and interface dimensions. DFM review identifies machining access, EDM requirements, shrinkage-related context, and critical molded-part surfaces.
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Ejector & Ejection Components
Ejector pins, sleeves, and ejection components are produced to the specified fit, travel, guidance, and wear conditions of the mold design. Supply mating dimensions, material and treatment requirements, surface expectations, and any return or venting features affecting manufacture.
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Core Pins, Guide & Locating Components
Core pins, guide pins, and locating components establish alignment, positional control, and repeatable interfaces within a mold assembly. Requirements should clarify datum references, mating fits, hardness condition, wear surfaces, and whether grinding or EDM finishing is required.
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Slides, Lifters, Gates & Mold Accessories
Mold slides, lifters, gates, and accessories are configured for mold motion, part release, material flow, and assembly interfaces. A complete drawing package should show travel relationships, mating components, critical clearances, material condition, and applicable finishing requirements.
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Connector Mold Components
Precision connector mold components support tightly controlled cavities, pins, inserts, guide features, and mating geometry used in connector-tooling assemblies. Review should address fine features, pitch relationships, burr sensitivity, material, heat treatment, EDM strategy, and inspection criteria.
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Stamping Die Components
Precision stamping die components include punches, dies, guide elements, inserts, and custom wear parts made to the drawing-defined strip, clearance, and assembly requirements. Material, heat treatment, edge condition, grinding stock, and mating dimensions guide the manufacturing route.
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Injection, MIM, CIM & Overmolding Tooling
Injection, MIM, CIM, and overmolding tooling components are evaluated against the specified process, molded material context, geometry, and tooling interfaces. Manufacturing planning considers cavity details, venting, gate requirements, insert conditions, heat treatment, and inspection needs within verified scope.
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Machining Materials
CNC machining materials are selected from the drawing and application requirements, including machinability, strength, corrosion behavior, wear needs, heat-treatment response, and inspection considerations. Specify material grade, condition, approved substitution rules, and any traceability requirement.
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Surface Finishes & Heat Treatment
Surface finishing and heat treatment are planned as controlled stages that can affect dimensions, distortion, wear behavior, corrosion resistance, and surface condition. Define the required treatment or finish, sequence, masking needs, critical dimensions, and post-process inspection expectations.
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Quality, Metrology & Documentation
Precision inspection, metrology, and quality documentation are aligned to the drawing, critical-to-quality features, datums, and approved inspection plan. State reporting needs, sampling expectations, revision level, material records, and any measurement-method requirements with the RFQ.
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Prototyping & Low-Volume Production
Rapid prototyping and low-volume manufacturing support drawing-based validation, bridge demand, tooling trials, and controlled repeat orders. To assess the route, provide models and drawings, quantity range, material, critical dimensions, inspection needs, revision status, and target delivery date.
Upload a DrawingAbout SUUXIANG Precision Manufacturing
SUUXIANG is the international-facing brand of Dongguan SuuXiang Precision Mold Co., Ltd., established in 2010 in Chang’an Town, Dongguan, Guangdong, China. XiaoCheng Huang is the founder and legal representative. We help global engineering, sourcing and quality teams turn drawings and specifications into inspected CNC-machined parts, precision mold components, connector tooling and stamping-die components.
For mold locating rings and related tooling components, our work begins with the drawing, 3D model, material, quantity, application and quality requirements. DFM discussion focuses on critical dimensions, datums, machining access, EDM or grinding needs, heat-treatment sequence and the inspection method before production commitments are made.
Our difference is disciplined process coordination across CNC milling and turning, multi-axis machining, EDM, grinding, fitting and inspection. We keep revision, inspection and delivery requirements visible throughout the project, so the final documentation aligns with the order and the agreed inspection plan.

Mold Locating Rings: Core Capabilities Explained
Machine Interface Review
Before quotation, SUUXIANG reviews mold locating rings against the mold-base drawing and available machine-interface data. The goal is to identify fit-critical diameters, ring height, mounting details, and sprue-bushing relationship before a process route or delivery commitment is proposed.
- Confirm stationary-platen locating diameter and counterbore interface
- Review ring height, mounting-hole pattern, and screw specification
- Check sprue-bushing centerline and nozzle-interface requirements
- Flag missing machine, mold-base, or mating-component data

CNC, EDM, and Grinding Planning
The manufacturing route is selected from the drawing, material condition, geometry, and critical surfaces. CNC machining establishes accessible features, while EDM or precision grinding is considered where geometry, finish, heat-treatment sequence, or dimensional control requires a different approach.
- Assess tool access and practical machining sequence
- Identify wire-EDM, sinker-EDM, or grinding needs early
- Plan stock allowance around heat treatment and finishing
- Keep feature relationships visible across each process handoff

Critical Dimensions and Datums
A locating ring is part of the mold-to-machine interface, so its function depends on more than nominal dimensions. SUUXIANG uses drawing review to clarify datums, concentricity relationships, contact surfaces, and tolerances that affect mounting, alignment, and assembly with adjacent mold components.
- Identify critical OD, ID, height, and mounting dimensions
- Confirm drawing datums before inspection planning
- Review concentricity and runout requirements where specified
- Separate functional requirements from noncritical dimensions

Inspection and Revision Traceability
Inspection planning is aligned to the accepted drawing revision and agreed quality requirements. For mold locating rings, the appropriate measurement method and reporting scope are defined before production so dimensional results, material requirements, and revision status can be documented against the order.
- Match inspection points to critical drawing requirements
- Confirm report format and documentation needs before release
- Maintain revision visibility through production coordination
- Provide order-aligned inspection documentation as agreed

Why Choose SUUXIANG for Mold Locating Rings?
A drawing-led workflow for custom parts where fit, revision control, and inspection evidence matter.
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Mold Locating Rings Manufacturing Process
A controlled workflow from drawing review through inspection, packing and delivery coordination.
Review the RFQ
We review the 2D drawing, 3D model, quantity, application, material, delivery target and inspection requirements before defining a workable quotation basis.
Confirm Critical Requirements
The project discussion identifies critical dimensions, datums, surface requirements, machine interface details, tolerance stack risks and revision-control expectations for the locating ring.
Plan Material and Process
Material, heat-treatment sequence, machining allowances and the appropriate CNC, EDM, grinding and fitting route are planned against the approved drawing requirements.
Machine and Finish Parts
Production follows the defined process route, using machining, wire EDM, sinker EDM and grinding where geometry, access and finish requirements call for them.
Inspect Against the Plan
Completed mold locating rings are checked against the order-specific inspection plan, with measurement methods and required documentation aligned before release.
Pack and Coordinate Delivery
Approved parts are packed for shipment with revision and delivery information kept visible, supporting clear receiving checks and project coordination at your facility.
How to Work With SUUXIANG
Move mold locating rings from drawing review to documented delivery through a controlled, drawing-driven process.
Submit Your Drawing Package
Provide 2D drawings, available 3D models, material, quantity, machine-interface details, critical dimensions, inspection needs, and target delivery date for initial review.
Clarify Technical Requirements
Review datum strategy, locating diameter, ring height, mounting pattern, sprue-bushing interface, tolerances, surface requirements, heat treatment, and measurement method before commitments.
Confirm Quote or Sample
Align the proposed process route, machining and grinding allowances, EDM needs, inspection scope, revision status, commercial terms, and sampling requirements with your project priorities.
Release Controlled Production
After approval, SUUXIANG coordinates CNC machining, EDM, grinding, fitting, and in-process checks according to the released drawing and agreed inspection plan.
Receive Inspected Parts
Receive mold locating rings with delivery information and order-matched inspection documentation, while revision records and any agreed reporting remain visible through project completion.
Certification and Quality Documentation for Mold Locating Rings

Customer References, Published Only With Approval
Approved customer testimonial pending: publish only after the customer confirms the project outcome, measurable result, attribution, and permission to share the reference.
Approved case example pending: confirm drawing revision, inspection outcome, delivery metric, customer attribution, and written permission before presenting this result publicly.
Approved customer testimonial pending: verify the engineering or sourcing result, supporting project record, named contact, and publication approval before adding it to this section.
Mold Locating Rings FAQ
Practical guidance for preparing a drawing-led quotation, production review, and inspection plan.
What information should I send for custom mold locating rings?
Can SUUXIANG manufacture mold locating rings from my drawing?
What material and heat-treatment details are needed for mold locating rings?
Is there a minimum order quantity for custom locating rings?
Can I order samples before production of mold locating rings?
How is lead time evaluated for a custom locating ring order?
What inspection reports can be requested with mold locating rings?
How are drawings and IP-sensitive mold component documents handled?
The Complete Buyer’s Guide to mold locating rings
Use this decision framework to specify compatible mold locating rings, assess drawing-based CNC suppliers, compare design and quality criteria, and avoid fitment, tolerance, documentation, and sourcing mistakes before tooling release.
1. What Are mold locating rings?
3.990 in. is a common inch-series locating-ring outside diameter, intended to seat in the stationary-platen recess and register the injection-side mold. By centering that mold interface, the ring helps place the machine nozzle concentrically with the sprue-bushing entrance so melt can enter without a nozzle-to-sprue offset; see https://www.dme.net/Pages/BuyLocatingRings.php.
Two separate interfaces must fit: the ring OD to the platen recess, and the ring’s mounting/central geometry to the mold’s sprue-bushing area. A loose, damaged, incorrect-height, or nonmatching ring can leave the nozzle poorly supported or off-center, increasing the risk of leakage, sprue damage, setup correction, and inconsistent processing.
One locating ring does not align mold halves or form plastic. Cavity alignment components and guide pillars control relative position of the moving and fixed mold halves; the sprue bushing provides the melt-flow passage. For a drawing review, identify the intended press recess, nozzle and sprue-bushing interface dimensions, mold-base datum, mounting pattern, and any insulation plate before the ring is manufactured.
2. Evolution of mold locating rings
3.990 in is a common locating-ring diameter in DME’s current catalog, illustrating how mold-base components became tied to repeatable stationary-platen interfaces rather than being treated as isolated machined parts. As standardized mold bases spread, ring OD, height, center opening, and mounting pattern became interface dimensions that purchasers must preserve. Source: https://www.dme.net/Pages/BuyLocatingRings.php
100 mm is a commonly used metric locating-ring size, while inch-series parts remain common in other mold-base ecosystems; similar nominal sizes are not automatically interchangeable. A global RFQ should therefore identify the controlling drawing units, platen recess, mold-base family, screw pattern, and sprue-bushing relationship. Source: https://ckmold.com/what-are-the-standard-sizes-for-injection-mold-locating-rings
7/32 in appears as a counterbore-depth convention in legacy-oriented locating-ring guidance, showing why machine age and installed tooling still affect replacement decisions. Before sourcing, verify the actual press interface and mold drawing rather than assuming a current metric or inch catalog ring will fit an older machine. Source: https://prototool.com/location-ring
3. Types of mold locating rings
Six configurations cover most mold-base and press interfaces. Select from the machine platen recess, clamp-plate counterbore, insulation-stack thickness, and sprue-bushing geometry—not nominal diameter alone. https://www.dme.net/Pages/BuyLocatingRings.php
| Configuration | Interface | Best Fit | Main Trade-Off |
|---|---|---|---|
| Standard | Single OD, screws | Matched mold base | Least adaptable |
| Stepped | Two OD shoulder | Opening transition | Depth sensitivity |
| Extended | Long lead-in | Deep platen recess | Insulation conflict risk |
| Adapter | Multiple diameters | Several press interfaces | More stack-up checks |
| Integrated | Sprue-bushing assembly | Compact mold | Service replacement coupling |
| Custom | Drawing-defined | Nonstandard interface | Requires full interface data |
Standard And Stepped Rings
Standard rings screw to the injection-side clamp plate and register one platen opening; they suit matched mold-base and machine standards.
Stepped rings add a second OD to bridge interfaces. Verify shoulder seating, counterbore depth, screw pattern, and clearance before choosing adaptability over simplicity.
Extended And Adapter Rings
Extended or tapered lead-in rings project farther into the platen recess, helping setup on deep or less accessible interfaces.
Multi-diameter or adapter-style rings accommodate alternate openings. Check that an insulation sheet does not consume engagement length; extra interfaces increase stack-up and service checks.
Integrated And Custom Designs
Integrated sprue-bushing rings combine the locating and flow-entry interfaces, reducing separate parts on compact molds.
Custom drawing-based designs address nonstandard platens, insulation, nozzle envelopes, or maintenance access. Define datums, concentricity, fasteners, removal method, and inspection requirements before release.
4. Materials and heat treatment
Two service conditions drive material selection: repeated platen contact and the molding environment. Carbon or alloy tool steels and stainless options should be specified from the drawing, not assumed from ring geometry.
| Operating Environment | Service Priority | Material And Treatment Consideration |
|---|---|---|
| Dry, routine molding | Machinability and moderate wear | Carbon or alloy tool steel; specify finish and hardness condition |
| High cycle or abrasive exposure | Wear resistance | Alloy tool steel; define treatment sequence and grinding allowance |
| Humid or corrosive exposure | Corrosion resistance | Stainless option; confirm hardness, finish, and compatibility |
| Elevated thermal demand | Dimensional stability | Select grade and treatment from actual temperature and load data |
Match Material To Service
Repeated installation favors a steel and hardness strategy that resists bore and face wear without making machining or later correction impractical.
Corrosive cooling, humid storage, or resin byproducts may justify a stainless option; corrosion resistance does not replace dimensional control or surface-finish requirements.
Define Treatment And Records
Heat treatment must state the required condition, sequence, and permitted distortion response before finish grinding. A hardness value alone cannot define performance.
Inspection records should identify material certificate, heat-treatment batch, final hardness method, and drawing revision where the order requires traceability.
5. Custom mold locating rings specifications
Two interfaces govern a custom ring: the mold assembly and the molding-machine stationary platen. SUUXIANG converts those interface records into a drawing-controlled CNC, EDM, grinding, and inspection route.
Interface Dimensions

Three primary dimensions—OD, ID, and overall height—must be confirmed against the platen recess, nozzle or sprue-bushing relationship, and clamp-plate counterbore. A shoulder, step, or lead-in needs its own diameter, depth, and mating-face requirement.
- Platen recess diameter and usable depth
- Sprue-bushing or nozzle clearance
- Counterbore diameter, depth, and flatness
Mounting And Datums
Two datum references should establish measurement: the mold-contact face as primary and the ring axis as secondary. Specify mounting-hole pattern, thread or clearance-hole details, screw-head access, concentricity requirements, and any clocking feature.
- Mounting-hole pitch circle and quantity
- Fastener size, engagement, and access
- Datum-linked OD, ID, and face tolerances
Material And Acceptance
One released drawing should state material, heat treatment, surface finish, edge-break limits, part marking, and revision. Define inspection methods for critical diameters, height, hole location, and runout, then require records matched to the approved revision.
- Material and heat-treatment condition
- Marking location and revision identity
- Inspection report and sampling requirement
6. Quality elements for mold locating rings
Functional quality begins by defining the locating diameter, mounting face, and central bore or sprue interface as related datums. A ring can meet individual size limits yet mislocate the mold when concentricity, face runout, or seating conditions are not controlled together.
Datum-Based Geometry
Total indicated runout should be measured from the locating diameter to the mounting-face datum, with the setup stated on the inspection record. Specify concentricity or positional control for the bore only when it is functionally related to the nozzle or sprue-bushing axis.
- Locating OD and its fit condition
- Mounting-face flatness and runout
- Bore axis relative to the selected datum
Installation Surface Condition
Burr-free screw holes, controlled thread engagement, and a defined edge break prevent false seating and assembly damage. Require the drawing to identify usable thread standard, depth, countersink or counterbore geometry, and any protected nonfunctional edges.
- No raised burrs on seating faces
- Clean thread start and full engagement
- Specified edge break, not sharp edges
Material And Inspection Evidence
Heat treatment, corrosion protection, and final measurements should be traceable to the ordered part revision. Request first-article dimensional results, material documentation when required, heat-treatment evidence where specified, coating details, and the inspection method used for critical features.
- Part number and drawing revision
- Measured critical dimensions and datums
- Material and treatment documentation
- Inspection date and acceptance status
7. Choosing a mold locating rings supplier
Two supplier types serve different jobs: catalog sources suit standard interfaces, while drawing-based CNC suppliers suit nonstandard geometry, tolerances, materials, or documentation. Compare the evidence returned before comparing unit price.
| Supplier Type | Best Fit | Buyer Evidence |
|---|---|---|
| Catalog source | Standard ring and known interface | Part number, dimensions, availability |
| Drawing-based CNC supplier | Custom geometry or controlled tolerances | DFM response, inspection plan, revision control |
| Hybrid sourcing | Standard base with custom adaptation | Interface ownership and assembly checks |
Test The Drawing Review
Five questions expose DFM quality: Which dimensions are CTQ, what datum controls runout, which features need grinding, what heat-treatment sequence applies, and how will the ring be inspected? A useful response identifies assumptions and manufacturability risks.
Require Process Evidence
Three records should align: process route, material and heat-treatment traceability, and inspection plan. Ask whether CNC, EDM, grinding, and final measurement are assigned to the drawing revision.
Control Approval And Changes
One first-article or sample workflow should define acceptance dimensions, report format, and disposition of deviations. Revision-controlled drawings, labeled packaging, realistic lead-time milestones, and a named quality-escalation path prevent avoidable receiving delays.
8. Common mold locating rings mistakes
A locating-ring mismatch often appears only during mold setup, when nozzle alignment and platen engagement are already at risk. Prevent it by verifying the complete machine-to-mold interface before release.
Nominal Diameter Assumptions
A 100 mm or 3.990 in. callout alone does not confirm fit. Verify actual platen recess diameter, tolerance, and the ring’s locating land before ordering.
Depth And Stack Errors
A shallow counterbore or added insulation sheet can reduce usable engagement. Confirm recess depth, ring height, clamp-plate thickness, and every insulation layer in section view.
Standard And Mounting Gaps
DME-style inch and metric patterns can share a similar nominal diameter but differ in details. State the governing standard, units, screw size, hole pattern, shoulder, and mounting direction.
Drawing And Inspection Omissions
Unclear datums and excessive tolerances create avoidable machining cost or assembly uncertainty. Identify functional dimensions, inspect OD, height, concentricity, and mounting features against the approved drawing at receipt.
9. From RFQ to production approval
1 controlled launch package prevents a locating-ring purchase order from drifting away from the press and mold interface. SUUXIANG can review drawing-based requirements when the mating details and acceptance evidence are supplied.
Capture Interface Data
1 RFQ should identify press platen recess, nozzle and sprue-bushing interface, clamp-plate thickness, mounting pattern, and assembly orientation. Include photographs or models where legacy tooling lacks reliable records.
- Machine and mold-base standard
- Critical diameters and datums
- Mating-component revision
Freeze The Technical Package
1 released drawing revision should define material, heat treatment, surface condition, tolerances, quantity forecast, and required inspection report. Request DFM feedback on tool access, EDM or grinding needs, and measurable datums before production.
- 2D drawing and 3D model
- CTQ dimensions and gauges
- Forecast plus target delivery
Approve And Release Production
1 first article should be checked against the agreed drawing and inspection plan before repeat production release. At receiving, verify revision, quantity, identification, critical dimensions, treatment documentation when specified, and damage-free fit with the mating mold components.
- Approve deviations in writing
- Lock revision control
- Record receiving results
10. mold locating rings pricing and cost
1-piece prototype orders concentrate setup, programming, first-article inspection, and expedited coordination into few units; a request should therefore compare total job cost and readiness date, not a presumed unit price. A complete 2D drawing, 3D model, material, hardness, datum scheme, and report requirement shortens clarification cycles.
2 or more compatible part numbers can often share material procurement, setups, heat-treatment planning, and inspection preparation when revisions and critical features are clearly separated. SUUXIANG should confirm the process route and documentation scope against the drawing before issuing a project-specific quotation.
| Quote-request factor | Illustrative fields to provide | Cost and lead-time effect |
|---|---|---|
| 1–5 pieces | Prototype or replacement; target date | Setup and first-article effort dominate |
| 6–50 pieces | Compatible part numbers; revision list | Batching can reduce repeated setup work |
| Material and heat treatment | Steel grade, hardness, sequence, certificate need | Procurement and post-machining allowance change |
| Geometry and tolerance | OD/ID, concentricity, screw pattern, datum, tolerances | CNC, EDM, grinding, and inspection route change |
| Finish and documentation | Surface finish, coating, inspection report, traceability | Additional operations and release records add cost |
| Production timing | Prototype, pilot, or repeat production; required delivery | Expedite requests may constrain process scheduling |
Quote Mold Locating Rings From Your Drawing
Upload 2D drawings, optional 3D models, material, quantity, quality requirements, and target delivery date for a disciplined review.











































