Real Manufacturing Case

Turn-Milled Black POM Long Cylindrical Mounting Component - 500 Pieces

A real DXSCNC production example for a 500-piece black POM cylindrical component combining turned references, internal M15 end threads and position-related milled side features.

Request a Quote Send Drawings for Review

Long black POM mounting component with milled side features

Confidentiality Note

This page uses DXSCNC-owned product photos and approved public project facts. Customer identity, drawing number, application, order value, exact thread pitch, inspection records and confidential dimensions are not published or inferred.

Project Snapshot

Page type	Real Manufacturing Case Study
Component	Long cylindrical mounting component
Material	Black POM engineering plastic
Quantity	500 pcs
Approximate size	Diameter 35 mm x length 160 mm
Main process	CNC turning and milling
Outside-diameter tolerance	+/-0.03 mm
End threads	Internal M15 threads at both ends; pitch not publicly specified
Surface roughness	Ra 1.6 um
Public evidence	Finished-component and feature-detail photos supplied by DXSCNC

Product Features

Nominal 35 mm outside diameter
Long 160 mm cylindrical body
Internal M15 threads at both ends
Longitudinal milled features
Cross holes and counterbores
Threaded side holes
Ra 1.6 um surface requirement
Position-related turned and milled geometry
Burr-free functional edges according to drawing requirements

Black POM long cylindrical component with internal M15 end thread — End view showing the confirmed internal M15 thread and turned cylindrical reference surface.

Real Production Photos

These are DXSCNC-owned photos of the actual component. The original backgrounds and visible manufacturing marks are retained. Web versions were resized and compressed to WebP without stretching or presenting altered images as additional production evidence.

Turn-milled black POM cylindrical component with cross hole and counterbore — Close view of a cross-hole, counterbore and longitudinal milled feature on the finished component.

Precision machined POM cylindrical part with longitudinal milled feature — Longitudinal milled geometry and side holes that must be related to the cylindrical centerline.

Internal M15 thread detail on a black POM cylindrical component — Internal M15 thread detail used to review thread entry, fit and edge condition.

Position-related side holes and threaded features on a machined POM component — Side-hole pattern and longitudinal feature used to explain positional and burr-control risks.

Material and Process

Black POM is an engineering plastic with good machinability, but a long cylindrical part can still be affected by clamping pressure, cutting heat, stress release and burr formation. The machining route must protect the outside diameter while creating internal threads and multiple side features.

The confirmed process is CNC turning and milling. The public record does not identify a machine model, one-setup claim, fixture design, cutting parameters or thread pitch.

Confirmed process scope

CNC turning of cylindrical references
Internal M15 thread machining
Controlled angular positioning for side features
Milling, drilling and counterboring
Deburring and surface-condition review

Manufacturing Risks

Centerline to milled-feature relationship

Longitudinal milled features and side holes must be positioned relative to the turned cylindrical centerline and end references defined by the drawing.

Cross-hole and counterbore position

Hole position, counterbore depth and side-thread location can accumulate error if angular and axial references are not controlled through the operation sequence.

POM clamping deformation

Excessive clamping force can temporarily distort a long plastic body and affect the measured outside diameter after release.

Heat and dimensional stability

Cutting heat and repeated machining can affect local dimensions, surface condition and measurement timing on engineering plastics.

Thread and intersection burrs

Internal thread entries, cross holes, counterbores and intersecting side features require planned burr review because loose or raised material can affect assembly.

Surface damage

Black POM can show handling marks, scratches and clamp marks, so functional and visible surfaces need protection during machining and inspection.

Machining Approach

Drawing review

Identify the cylindrical centerline, end references, OD tolerance, M15 thread callouts, side-feature positions, roughness and burr requirements.

Turned references

Establish the outside diameter and end references used to relate later milled and drilled features.

Angular positioning

Control the angular relationship of longitudinal milled features, cross holes, counterbores and threaded side holes.

Operation sequence

Sequence turning, milling, drilling and threading to reduce accumulated alignment error and unnecessary reclamping risk.

Plastic machining control

Manage clamping pressure, cutting heat, chip evacuation and handling to reduce deformation, burrs and surface damage.

Final review

Check drawing-defined dimensions, feature relationships, thread condition, burrs and visible surface condition before packing.

Inspection Focus

Inspection is planned from the drawing and functional relationships. For this component type, the primary focus includes the outside diameter, end threads, hole and counterbore dimensions, side-feature position, burr condition and surface roughness requirement.

Suitable methods may include micrometers, thread gauges, height gauges, optical measurement or CMM inspection where required by geometry and tolerance. The public page does not claim a specific inspection report or result for every feature.

Review points

OD size and long-body consistency
M15 internal thread fit
Cross-hole and counterbore dimensions
Side-feature position relative to datums
Burr condition at intersections
Ra 1.6 um surface requirement

Surface Treatment / Packing

No separate surface treatment has been approved for public release. The black appearance shown in the photos is the confirmed black POM material, not a claimed coating.

The project-specific packing method is not public. For comparable long plastic components, packing review should protect threads, milled edges and the cylindrical surface while limiting bending, impact and part-to-part contact during shipment.

Engineering Takeaway

A long POM component with end threads and multiple side features should not be quoted from outside diameter and length alone. Buyers should define the functional datums, angular relationships, hole and counterbore requirements, thread specification, burr limits, surface roughness and inspection method.

This real project record demonstrates DXSCNC's ability to review medium-volume engineering-plastic parts that combine cylindrical geometry, internal threads and multiple position-sensitive milled features. It does not imply unsupported results beyond the published facts and photos.

Buyer focus

Functional datum scheme
Thread standard and pitch
Feature position tolerances
OD and roughness requirements
Burr-free intersections
Plastic-safe packing

RFQ Checklist

2D drawing
3D STEP model
POM grade and color
Quantity
Complete M15 thread specification
Critical tolerances and datum references
Hole, counterbore and side-thread requirements
Surface roughness notes
Burr and edge requirements
Inspection and packing requirements

Send drawings for review

DXSCNC will review machining range, POM workholding, heat and deformation risk, feature relationships, burr control and inspection feasibility before quoting.

Send Your Drawing

Feature Position Accuracy in Turn-Milled Parts

Read the engineering guide to cylindrical datums, angular positioning, cross-hole and counterbore relationships, POM workholding and inspection planning for position-sensitive turn-milled components.

Technical Note

The guide uses this black POM production example to separate confirmed project facts from general machining guidance.

Read feature-position guide

FAQ

What material is used for this cylindrical component?

The confirmed material is black POM engineering plastic. No separate coating or surface treatment is claimed on this page.

What are the confirmed size and quantity?

The public project facts identify 500 pieces at approximately 35 mm diameter x 160 mm length.

What thread specification is public?

Both ends have internal M15 threads. The pitch and fit class are not published, so buyers should provide the complete thread callout in a new RFQ.

Why are the side features difficult to machine?

Longitudinal milled features, cross holes, counterbores and threaded side holes must maintain controlled angular and axial relationships to the turned cylindrical references.

What should buyers send for a similar POM part?

Provide the 2D drawing, 3D STEP model, POM grade, quantity, complete thread specification, datum scheme, critical tolerances, roughness, burr requirements, inspection notes and packing requirements.

Need a Similar POM Component?

Send drawings, POM grade, quantity, thread specification, tolerance requirements, surface notes and inspection requirements for engineering review.

Drawing-based review

DXSCNC will review the part geometry and public project comparison without requesting disclosure of unnecessary customer information.

Request a Quote Send Your Drawing