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Custom POM CNC Machine Tool Turret Indexing Pin
Tianjin SWKS Technology & Development Co., Ltd. develops drawing-based POM molded components for drawing-defined CNC lathe turret indexing and auxiliary positioning mechanisms. The cnc turret indexing pin is configured around the customer's mating hardware, available installation space and operating duty. Product images illustrate a representative finished design; dimensions, material formulation and interfaces are established in the approved project specification.
Product Parameters
| Material | POM; specific grade agreed for the project |
|---|---|
| Production service | Custom injection molding and mold development |
| Equipment application | drawing-defined CNC lathe turret indexing and auxiliary positioning mechanisms |
| Main design review | Locating Nose and Travel Clearance |
| Size and geometry | Manufactured to the accepted drawing revision |
| Color and texture | Customer-defined; representative image colors shown |
| CAD and drawings | STP, STEP, IGS and dimensioned 2D files |
| Approval basis | Samples, functional fit and agreed inspection criteria |
Auxiliary indexing in a turret mechanism
This POM pin is manufactured to a customer-defined locating duty in a CNC turret or associated positioning assembly. Its nose enters a mating feature to establish a specified position during an approved sequence. Identify whether the pin is an auxiliary locator, an assembly aid or another low-load interface. A plastic indexing pin is not assumed to replace the primary metal locking system that carries machining forces.
Nose shape and entry conditions
A rounded taper can help the pin enter a corresponding hole when that geometry is part of the approved mechanism. The entry angle, tip radius and engagement depth should be shown on the drawing. A short chamfered lead and a long centering taper behave differently. The mating surface should be supplied as part of the review, including any requirement for clearance during approach and positive location after the stroke is completed.
Shank register and actuator travel
The cylindrical shank guides the pin relative to its housing or bushing. Define the running clearance, supported length and direction of actuation. A rear collar may establish an end stop, while a reduced tail can connect to a separate actuator or retaining feature. The complete motion should prevent unintended side loading or binding. The position reached by the actuator is evaluated together with the nose engagement, not solely from overall pin length.
Acetal and the turret environment
POM selection follows coolant exposure, temperature, contact frequency and any lubricant applied to the guide. Chips and abrasive contamination can change wear behavior even when the initial sliding fit is satisfactory. The design should identify how the pin is protected or cleaned. Resin changes, including modified formulations, are discussed against the agreed dimensional and contact requirements rather than selected only from color or general material description.
Reference surfaces and tolerance allocation
The drawing should identify which diameter guides motion, which face limits travel and which part of the nose establishes location. These features may need different controls. Runout between the shank and nose can matter more than a close tolerance on an unused tail diameter. Any retaining groove should have enough clearance for its intended hardware while avoiding a sharp transition that conflicts with the specified handling or operating duty.
Manufacturing and working-edge condition
A molding proposal considers draft, parting position and ejection around the guiding shank and nose. Where the required geometry calls for another finishing operation, it should be identified in the offer. Flash, gate marks and local distortion must remain outside the controlled locating interface. The customer defines acceptable wear limits and replacement criteria so the inspection approach reflects how the pin is used in the turret sequence.
Movement trials and service identification
Samples are checked with the actual guide bushing and mating indexing feature. Confirm entry, dwell and withdrawal at the intended travel, including the available clearance as the turret changes position. The equipment builder establishes cycle tests and permitted contact loads. Revision marking or separate packaging can distinguish pins with different tapers or collar locations, reducing the risk of installing a visually similar locator in the wrong mechanism.
Preparing a turret pin RFQ
Provide the shank and mating-hole drawings, required stroke, entry direction and the expected number of cycles. Include coolant identity, normal temperature and any known side force during engagement. State the POM preference and quantities for samples and production. SWKS can review the proposed plastic locating part within that defined duty and identify the dimensions to confirm before a mold is released.
Related project guidance: defining tolerances for molded part performance and moving from CAD review to custom production.
Welcome to send an inquiry for your cnc turret indexing pin. Contact Tianjin SWKS Technology & Development Co., Ltd. at amanda@tjswks.com or 0086-15222707659. Please include drawings, quantities and the application details above so our offer can address the actual tooling and production requirements.
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