Custom Precision Hobbed 321 Stainless Steel Spur Gear With Keyed Bore Hub
Product Overview
The Precision Hobbed 321 Stainless Steel Spur Gear is a hub‑type spur gear produced through a four‑process chain: CNC turning for the hub and datum diameters, gear hobbing for the tooth form, CNC milling for keyway and lightening holes, and wire EDM where profile accuracy requires. Machined from 321 stainless steel (AISI 321 / 1.4541) — a titanium‑stabilized austenitic grade resistant to oxidation and intergranular corrosion — the gear is suited to medium‑speed drives in heat‑exposed and corrosive environments. The keyed bore hub delivers positive torque transfer to the shaft, while lightening holes reduce rotating mass without compromising the web. Tooth count, module and pressure angle are machined to your drawing, with tooth‑form inspection reported on request.
Part At A Glance
Material
321 Stainless Steel (AISI 321 / EN 1.4541, titanium‑stabilized)
Manufacturing Process
CNC Turning + Gear Hobbing + CNC Milling + Wire EDM
Tooth Form
Straight spur teeth, hobbed; tooth count, module and pressure angle per drawing
Hub Design
Integral hub with keyed center bore; keyway size per drawing
Web
Lightening holes in web, quantity and pattern per drawing
Surface Finish
As‑machined; passivation or electropolishing optional
Tolerance & Bore
±0.01 mm; ±0.005 mm on critical features; bore and keyway verified for shaft fit
Order & File
1 piece prototype to high‑volume; Accept STEP / STP / IGES / PDF
Manufacturing Capability
| Feature | What We Deliver |
|---|---|
| Four‑Process Chain In‑House | Turning, gear hobbing, milling and wire EDM completed under one roof, so the tooth form and the datum diameters come from one controlled setup sequence |
| Gear Hobbing | Spur teeth hobbed on dedicated gear equipment; tooth count, module and pressure angle set from your drawing |
| Keyway & Bore Accuracy | Keyed bores machined for positive torque transfer and verified against drawing tolerances |
| Wire EDM | Applied where profile accuracy or thin‑web geometry demands it, holding clean edges on lightening features |
| Production Scalability | From single‑piece prototypes to small‑batch and high‑volume production on the same line and the same tolerance standard |
Quality Control & Buyer Benefits
| Item | Details |
|---|---|
| Three‑Stage Inspection | First‑article, in‑process and final inspection performed on every order; dimensional reports issued with each shipment |
| Tooth Form Verification | Tooth form and keyway geometry checked against drawing tolerances; inspection results available on request |
| Runout Checks | Bore‑to‑pitch‑circle runout verified to keep the gear running concentric on the shaft |
| Material Traceability | Mill certificates for 321 stainless steel available on request |
| Protective Packaging | Individual wrapping and partition packaging keep tooth flanks and edges free of transit damage |
Typical Applications
Quality You Can Verify, Not Just Trust
Shenzhen Perfect Precision Products Co., Ltd. runs a 20‑year‑old factory with 6,000 square meters of floor space, 100+ CNC machines and a full ERP system.
- Four‑stage control: incoming material checks, first‑piece approval, batch sampling and 100% pre‑shipment QC.
- Measured, not eyeballed: tooth‑form inspection, runout checks and dimensional reports on request.
- Documents: material certificates, mill certificates and gear inspection records available.
- After‑sales: report any issue by call, video conference or email within one month; our team responds with a solution within one week.
Samples And Lead Times
- ·Sample: 1‑2 weeks
- ·Production: 3‑4 weeks after approval
- ·Quote: send PDF, STEP, IGS or DWG, or simply photos and size notes of the part you need
About Us
Processing Material
Application
POSITIVE FEEDBACK
FAQ
1. Are you a manufacturer or a trading company?
We are a factory located in Shenzhen, China, with 20 years of rich experience, covering 6000 square meters. Complete facilities, including 3D quality inspection equipment, ERP system and 40 machines. If necessary, we can provide you with material certificates, sample quality inspection and other reports.
2. How to get a quote?
Detailed drawings (PDF/STEP/IGS/DWG...), including quality, delivery date, materials, quality, quantity, surface treatment and other information.
3. Can I get a quotation without drawings? Can your engineering team draw for my creativity?
Of course, we are also glad to receive your samples, pictures or detailed size drafts for accurate quotation.
4. Can you provide samples before mass production?
Of course, the sample fee is necessary. If possible, it will be returned during mass production.
5. What is the delivery date?
Generally, the sample lasts for 1‑2 weeks and the batch production lasts for 3‑4 weeks.
6. How do you control quality?
(1) Material Inspection ‑ Check material surfaces and approximate dimensions.
(2) First inspection of production ‑ ensure critical dimensions in mass production.
(3) Sampling inspection ‑ check the quality before delivery to the warehouse.
(4) Preshipment inspection ‑ 100% inspection by QC assistant before shipment.
7. After‑sales service team
If you have any problems after receiving the product, you can provide feedback through voice call, video conference, email, etc. within one month. Our team will provide you with solutions within a week.
