Precision Spur Gears (External & Internal)

Build-to-Print Machining Services | DIN 6 / AGMA 10 Grind Capability | Traceable Heat Treatment

Product Overview

High-load, low-backlash cylindrical spur gears engineered for precision motion control. Manufactured via hobbing/shaping followed by CNC gear grinding. Supplied with complete inspection protocols (Leica/Wenzel CMM or gear checker lead/profile charts) upon request.

Standard Range: Module 0.5 to 6.0 | Pitch Diameter <= 400 mm

Accuracy Capability: DIN 6 to DIN 8 (ISO 1328-1)

Configuration: External spur, internal spur, stepped shafts, integral pinion designs

Technical Specifications

Parameter	Specification Range / Standard	Verification Method
Module (m)	0.5 mm – 6.0 mm	Thread micrometer / Pin gauge
Accuracy Grade	DIN 6, DIN 7, DIN 8 (ISO 1328-1)	Klingelnberg / Wenzel Gear Checker
Material Options	20CrMnTi, 4140, 17CrNiMo6, 31CrMoV9, stainless (440C/17-4PH)	Mill test certificate (3.1/2.2)
Heat Treatment	Case Carburizing & Quenching (HRC 58–62), Nitriding, Induction Hardening	Vickers microhardness tester
Surface Finish (Ra)	Tooth Flank: Ra <= 0.4 um (ground); Bore/Face: Ra <= 0.8 um	Profile roughness tester
Backlash (Assembled pair)	0.02 mm – 0.08 mm (custom selectable)	Indicator check on test center
Max Outer Diameter	<= 400 mm	OD micrometer / CMM
Face Width	<= 80 mm	Vernier / Depth micrometer

Key Features

Ground Flank Geometry: Profile and lead modifications (profile relief, crowning) executed on CNC gear grinders to mitigate edge loading at rated torque.

Controlled Distortion: Low-pressure carburizing (LPC) or gas carburizing paired with fixture quenching to hold bore runout <= 0.015 mm post-treatment.

Burr-Free Edges: Chamfering and deburring performed via rotary power-brush or electrochemical deburring (ECD) for clean assembly fit.

Material Traceability: Heat-treatment furnace batch logs and micro-section hardness depth reports (case depth CHD at 550 HV) available with lot shipment.

Applications

Industry	Specific Sub-Assembly	Functional Requirement
Robotics	Joint secondary reduction stage	High torsional rigidity, low positional hysteresis
AGV / AMR	Wheel hub traction transmission	High dynamic load capacity, low operational decibel level
Medical Devices	Precision fluid dosing / infusion drive	Smooth motion transfer, zero backlash requirement
Industrial Automation	Electronic cam indexer / rotary table	Indexing repeatability, wear resistance under continuous duty

Customization Parameters

Provide the following parameters or a STEP/2D PDF drawing for technical review:

Gear Data: Module/DP, Number of teeth, Pressure angle (20 deg or 14.5 deg), Helix angle (0 deg for spur).

Interface: Bore tolerance (H7/H6), keyway (JS9) or splined profile, tapped set-screw holes.

Surface Protection: Black oxide, electroless nickel plating (ENP), passivated (stainless), or anti-rust oil film.

Lot Size: Prototype phase (10–50 pcs) vs. annual volume release schedule.

Manufacturing & Quality Control (Factory Snapshot)

Primary Machining: CNC Hobbing (Liebherr / Gleason), CNC Shaping (Lorenz).

Finishing: CNC Gear Grinding (Reishauer / Höfler profile grind).

QC Assets: Gear Measuring Center (Klingelnberg P26 / Wenzel), Optical comparator, Hardness tester.

Inspection Protocol: 100% dimensional check for critical bores/ODs; first-article inspection (FAI) report with gear chart per ISO 1328 for batch sign-off.

QMS & Compliance: ISO 9001:2015 certified shopfloor | Export wooden packaging strictly compliant with ISPM 15 heat-treated standards.

Packaging & Delivery

Corrosion Protection: VCI (Volatile Corrosion Inhibitor) poly bag sealed + individual cardboard slot separation (prevent tooth-to-tooth impact).

Bulk Packaging: Export-grade heavy-duty plywood carton with foam interlayer; palletized for sea/air freight.

Lead Time: Standard custom batch production: 3–5 weeks after drawing sign-off; expedited prototype: 10–14 days (subject to raw material stock).

FAQ

Q: Can you grind spur gears smaller than module 1.0 to DIN 6?

A: Yes, our small-module CNC gear grinding handles down to module 0.5 with DIN 6 flank accuracy.

Q: Do you stock standard modular spur gears, or are you build-to-print only?

A: 90% of production is build-to-print customer specifications. Standard catalog items are limited; send your drawing for direct cross-reference.

Q: How do you control bore contraction/expansion after case carburizing?

A: We leave a 0.20–0.35 mm grinding allowance on bores and finish-hone/grind internal bores and reference faces after heat treatment.

Q: What is your standard MOQ for custom ground gears?

A: 50 pcs per part number for ground gears due to setup/dressing time on gear grinders; lower quantities accepted with setup fee adjustment.

Request a Quote (RFQ)

High-Conversion RFQ Form Spec (4 Fields Only):
Name (Text)
Corporate Email (Email validation, block freemail if needed)
Drawing / File Upload (Drag & drop .STEP, .PDF, .IGES, .PARASOLID up to 50MB)
Target Delivery / Phase (Dropdown: Prototype 5-20 pcs / Pilot batch 50-200 pcs / Annual release)

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