Custom Locating Pins Manufacturer — Precision Machined to Your Drawings
- ISO 9001 certified
- Years of experience in parts manufacturing
- One-stop service
- Support metal and engineering plastics
- Supports prototypes, low-volume and volume production orders
- Strict tolerance control
Why Choose Our Locating Pin Solutions?
DSR offers a comprehensive range of machining processes. We are capable of machining locating pins according to your part drawings, assembly configurations, and specific positioning requirements, rather than being limited to standard sizes. Structural features including diameter, length, steps, shoulders, threads, etc. are all customizable to the specific application. We also select appropriate machining and inspection methods for critical dimensions so that the locating pins can achieve a stable and repeatable fit.
In addition, for the mating surfaces of the locating pins, we can perform precision turning, grinding, or other finishing processes to control dimensions and surface roughness. DSR can help you maintain dimensional consistency of the locating pins across different batches, ensuring product quality.
Customization Options Supported by DSR
DSR can customize various types of locating pins to meet the specific needs of each of our customers. Our team will focus on evaluating the workpiece side, the mounting side, the mounting structure, and the critical dimensions that truly affect positioning accuracy. The goal is to ensure that the positioning pins fit better with the existing assembly structure.
- Working end structure: The working end of the positioning pin can be designed as cylindrical, diamond, cone, bullet, spherical, etc. Different structures correspond to different positioning directions, contact methods and import requirements.
- Body size: We can customize the pin diameter, total length, effective working length, and other specifications based on the existing hole locations and installation space for a specific application.
- Installation end structure: We are able to machine press fit shanks, external threads, internal threads and other locating pin features. Of course, for positioning pins that require frequent maintenance or replacement, we can also adjust the installation structure according to disassembly and assembly requirements.
- Imported features: For applications that require frequent loading and unloading of workpieces, we can also add chamfers, fillets, tapers, ball heads or appropriate guide lengths to the positioning end.
- Critical Dimensions and Geometric Requirements: Based on the drawings, we identify the critical requirements that truly impact positioning functionality. We focus on critical areas of the locating pins and avoid unnecessary over-precision of non-functional dimensions.
Types of Locating Pins We Can Manufacture
DSR offers custom machining services for various types of locating pins. We will manufacture products that meet your application requirements based on your drawings and samples. Our locating pins help reduce errors during machining or assembly, thereby ensuring the consistency of your product quality.
The positioning section of straight positioning pins typically maintains a consistent diameter and is primarily used for basic positioning, alignment, and assembly of parts. We can machine these pins according to drawings to specifications including various diameters, lengths, end chamfers, and precision fit tolerances.
Stepped locating pins feature two or more different diameters, enabling simultaneous positioning, limiting, and mounting functions. The step positions, diameters of each section, transition structures, and effective positioning length can all be custom-machined to suit your assembly design.
Round locating pins have a cylindrical shape and are suitable for a wide range of applications. They can be used for both internal and external positioning of workpieces and are often used as the primary locating pin in a two-pin locating system. We can manufacture them to precise tolerances to ensure a tight fit with the workpiece hole.
Diamond locating pins reduce constraint in one direction by unloading on both sides and are often used in conjunction with round pins. In addition to its positioning function, it also leaves a release direction for hole spacing errors or thermal expansion, reducing the risk of jamming when two round pins are inserted at the same time.
Tapered locating pins provide a degree of self-guidance and self-centering during the assembly process. These locating pins are suitable for applications requiring quick insertion and repeatable positioning. Taper angle, locating length, end shape and surface roughness can all be customized according to the mating hole structure.
Shoulder locating pins provide an axial mounting reference or stop. We can customize the shoulder diameter, thickness, pin length, end configuration, and locating fit tolerances. These locating pins are suitable for fixtures, tooling, and precision assemblies.
Threaded locating pins combine a precision locating section with an internal or external threaded structure. This not only enables precise positioning but also ensures a reliable installation. For a suitable structure, we can try to complete the processing of the positioning section and the threaded section in the same clamping to improve coaxiality and dimensional consistency.
The headed locating pin features an enlarged head, which can be used for axial positioning, to prevent over-insertion, and to facilitate installation and removal. We can machine the head diameter, thickness, shape, and locating section dimensions according to your drawings.
Spring locating pin provides a certain degree of axial float and continuous contact force through its internal spring structure. This type of locating pin is suitable for applications where workpieces have slight dimensional deviations, flexible contact is required, or rigid locating interference needs to be avoided.
We can also machine custom positioning pins featuring flat surfaces, grooves, through holes, special ends, multi-step profiles, threaded ends, or other combinations of features. Simply provide us with your drawings, and we will evaluate the design, tolerances, materials, heat treatment, and manufacturability.
From Prototype Assembly to Mass Production
For custom positioning pins, we plan the manufacturing and inspection processes based on actual assembly requirements and subsequent mass production needs. From prototype verification to stable mass production, we control the accuracy and batch consistency of parts.
PrototypeWe can manufacture prototypes to verify the functions of locating pins, such as insertion, fit, and positioning. This helps you identify discrepancies between the drawings and actual assembly before parts go into mass production.
Low-Volume ProductionWe support low-volume production tailored to specific applications, which are very suitable for projects such as automated equipment assembly and trial production lines. This strikes a balance between quantity and manufacturing costs.
Repeat ProductionIn mass production, we standardize the machining process, clamping methods, and inspection methods for critical dimensions. We also continuously monitor the locating diameter, geometric relationships, and functional features to minimize dimensional variations between batches.
Advantages of DSR’s Custom Locating Pins Service
We can manufacture various custom locating pins entirely according to your design drawings. These components feature precise positioning, high repeatability and longer service life.
Accurate positioning depends on consistent dimensions and controlled fits. The locating pins we produce ensure stable alignment and repeatable positioning accuracy in demanding applications.
Whether you need a single prototype or batch-manufactured parts, we can provide solutions tailored to your project requirements.
Our team reviews your drawings and application requirements before production. After , we will assess and formulate a reasonable machining plan.
We will inspect the key dimensions, surface finish, hardness, and geometric characteristics of the customized positioning pins. This ensures consistency in the quality of parts across different batches.
We offer custom positioning pin manufacturing with no minimum order quantity. For new projects, you can first verify the dimensions, fit, and actual positioning performance with a small number of samples.
Materials for Custom Locating Pins
The selection of materials for locating pins primarily depends on requirements such as the load, wear resistance, corrosion resistance, and frequency of use of the part. Of course, we also machine parts using materials specified in the drawings, and we can evaluate suitable material options based on the actual operating environment.
- Carbon Steel: Carbon steel has good strength, processability and cost advantages.
- Alloy Steel: This material is suitable for applications that can withstand higher loads, frequent assembly and disassembly, or long-term repeated positioning.
- Stainless Steel: It has good corrosion resistance. This material is suitable for use in humid, frequent cleaning environments or where rust resistance is required.
- Tool Steel: Tool steel is suitable for positioning applications that require high hardness, wear resistance and service life.
- Customer-Specified Materials: If your drawing specifies a specific material grade, we can purchase and process it as required.
- Engineering Plastics: Suitable for positioning applications where lightweight, insulation, low friction or avoidance of metal scratches are required.
Quality Inspection for Custom Locating Pins
Dimensional accuracy, geometric tolerances, and surface quality directly affect the positioning accuracy and assembly stability of the locating pin. DSR develops customized inspection plans based on customer drawings and actual application requirements. From raw materials to finished products, we implement comprehensive quality control. Our goal is to ensure that every batch of customized locating pins meets the specified technical requirements.
We will focus on inspecting the locating diameter, overall length, effective working length, step dimensions, shoulder position, and installation-end dimensions. For precision-fit areas, micrometers, pneumatic gauges, plug gauges, or other suitable measuring instruments may be used for inspection according to the tolerance requirements. For precision-fit areas, our inspectors will use measuring instruments such as micrometers and pneumatic gauges for inspection.
In addition, during the final inspection, we will also confirm whether the positioning end, import structure, and surface condition are complete, and check for appearance issues such as burrs, bumps, and rust. Of course, we can also provide you with material certification or related quality documents.
Surface Finishes for Custom Locating Pins
The surface treatment of positioning pins not only affects corrosion resistance but may also impact the final fitting dimensions, surface friction, and wear resistance. Therefore, we select an appropriate surface treatment method based on the locating area, tolerances, and actual operating environment.
Black oxide treatment can form a relatively thin protective layer on the surface of steel locating pins, improving their appearance and providing basic rust prevention. Since the treatment layer is relatively thin, it has a relatively small impact on precision-fit dimensions.
Zinc plating can improve the corrosion resistance of carbon steel and alloy steel locating pins, making them suitable for general industrial environments.
Nickel plating provides good corrosion resistance, wear resistance, and surface quality. This surface treatment is suitable for locating pins with certain requirements for both protective performance and appearance. For precision working surfaces, we will consider the final dimensional requirements based on the plating thickness.
Chrome plating can improve the surface hardness, wear resistance, and corrosion resistance of locating pins. This process is highly suitable for locating applications involving frequent friction or high wear requirements.
For stainless steel locating pins, we can improve the corrosion resistance of their surfaces through passivation treatment.
For the critical locating surfaces of the locating pin, we can further improve dimensional accuracy and surface roughness through grinding or polishing.
Through nitriding treatment, the surface hardness, wear resistance, and fatigue resistance of the locating pin can all be significantly improved, while its dimensional changes remain relatively small.
Typical Applications of Custom Locating Pins
Our custom locating pins are widely used in mechanical systems requiring high-precision positioning, repetitive clamping, component alignment, and quick changeovers. Compared to standard locating pins, non-standard locating pins can be designed according to your specific application needs. They can better adapt to special operating conditions such as space-constrained heavy-duty applications or corrosion resistance.
Custom locating pins are widely used in machining fixtures, welding fixtures, and assembly jigs. This component can be used to quickly determine the position of a workpiece and maintain consistency in repeated clamping.
Automation equipment typically requires locating pins to ensure workpieces can quickly and accurately enter the predetermined position. We can customize the guide length, end profile, and mounting structure.
In automotive manufacturing, non-standard locating pins are typically required for use with specialized fixtures, inspection tools, and assembly tools. For these applications, we can customize locating pins according to drawings to meet the requirements for repetitive positioning and long-term use.
Locating pins can be used for alignment and repeated assembly between mold components. This component helps control the relative positions of templates, inserts, and related components.
Aerospace components typically have complex structures and require high clamping stability and positional repeatability. Our custom locating pins can be used for fixture positioning of parts with special curved surfaces, thin-walled parts, and large structural components.
In damp, frequently cleaned environments or environments with high hygiene requirements, locating pins need good corrosion resistance and ease of cleaning.
Custom Locating Pins Technical Capabilities
- Detailed Specifications
| Item | DSR Manufacturing Capability | Conditions |
| Minimum / maximum pin diameter | Diameter 1.0-25.0 | Turning: ±0.01; Grinding: ±0.005; Coating: ±0.01 |
| Maximum overall length and length-to-diameter ratio | 100, 4:1 | / |
| Standard diameter tolerance | ±0.01 | / |
| Achievable roundness / cylindricity | 0.015 | / |
| Achievable coaxiality / runout | 0.01 | / |
| Surface roughness | Ra0.08 | / |
| Heat treatment and hardness range | Determine based on specific materials | / |
A locating pin is a mechanical component used to precisely determine the relative positions of two or more parts. This component is commonly used in jigs, molds, machine tools, and assembly structures. Its function is to position parts and maintain assembly accuracy.
4-way pins and 2-way pins.
4-way locating pins are typically cylindrical locating pins that fit closely with round holes. This type of locating pin can simultaneously restrict the workpiece’s movement in the X and Y directions within the plane.
2-way locating pins are usually diamond pins or relieved pins, which only contact the locating hole in one axial direction. Therefore, this type of locating pin only restricts the movement of the workpiece in one direction along the X or Y axis.
The main functions of pins in mechanical structures are to position, connect, fix and transmit loads.
A dowel pin is a common cylindrical pin used for general alignment. And a locating pin is precisely designed for the repetitive positioning of workpieces in fixtures.
An alignment pin is used to guide and calibrate the positions of two or more parts during assembly.
Standard ±0.01mm on ground diameters; up to ±0.005mm on request.
Metric locating pins refer to locating pins manufactured according to metric standards, with dimensions expressed in millimeters (mm).
