Alloy Steel Worm And Worm Gear for Auto Parts – M0.2-M2.2, ODM

Alloy steel worm and worm gear for auto parts are precision miniature worm gear pairs produced specifically for automotive and high-precision applications — diameter Φ5 mm to Φ120 mm, module M0.2 to M2.2, in alloy steel, stainless steel, aluminium, copper, brass, iron, titanium, and other materials as required. Manufactured by CNC turning, milling, drilling, hobbing, polishing, and surface treatment with tolerances from 0.001 mm to 0.1 mm. ODM/OEM accepted. Sample available. Delivery by DHL, TNT, FedEx, or UPS.

Korea Ever-Power's alloy steel worm and worm gear for auto parts are produced by a factory with more than ten years of experience and hundreds of qualified personnel — one of China's leading manufacturers of automotive precision worm gears. High precision machining, cost-effective engineering design, short lead time (sample: 7–10 days typical), and high quality with diversification of material and surface treatment options are the defining characteristics of this product line.

High Precision Machining

Korea Ever-Power's alloy steel worm and worm gear for auto parts are machined on CNC hobbing machines, CNC lathes, and CNC milling centres to tolerances from 0.001 mm (precision grade applications) to 0.1 mm (standard industrial applications). The tight tolerance capability — particularly the 0.001 mm achievable on bore diameter and the thread profile accuracy maintained by CNC hobbing — is essential for automotive worm gears where the gear pair must assemble correctly in mass production without selective fitting or individual adjustment.

Broad Application Range

Automotive, medical, industrial, military, aircraft, and mechanical applications — Korea Ever-Power's alloy steel worm gear for auto parts covers the full spectrum of precision worm gear applications. The M0.2 module lower limit (Φ5 mm minimum OD) reaches the smallest commercially useful worm gear sizes for miniature automotive and medical actuators; the M2.2 module upper limit (Φ120 mm maximum OD) covers medium-duty industrial and aircraft actuator sizes. A single supplier for worm gears across all these applications simplifies supplier qualification management.

Cost-Effective Engineering Design

More than ten years of experience in automotive precision worm gear manufacture allows Korea Ever-Power to propose cost-effective designs for custom applications — selecting the minimum module that achieves the required torque capacity, the most economical material that meets the life and environment requirements, and the simplest surface treatment that provides the required corrosion protection. Cost-effective engineering design reduces total cost without compromising the gear set's performance or service life.

OEM/ODM Service

Korea Ever-Power's factory + trade business model combines in-house manufacturing capability (CNC turning, hobbing, milling, heat treatment, surface treatment) with direct international sales — giving automotive OEM and Tier 1 customers factory-direct pricing without the minimum order quantities typical of Chinese gear manufacturers. For customers without drawings, Korea Ever-Power's engineering team produces a 3D CAD model and drawing from a sample or dimensional sketch, both for customer approval before production.

High Quality and Short Lead Time

Sample production in 7–10 days is achievable for the majority of alloy steel worm gear configurations in Korea Ever-Power's standard module range (M0.2–M2.2, Φ5–Φ120 mm). This short sample lead time is made possible by Korea Ever-Power's large in-house stock of worm gear blanks, tooling, and fixtures in all standard module sizes — allowing rapid set-up without long procurement lead times for specialised tooling.

Material Diversification

Alloy steel, stainless steel, aluminium, copper, brass, iron, and titanium — Korea Ever-Power's alloy steel worm gear for auto parts is available in any material the automotive or special application requires. For automotive worm gears where weight reduction is a programme target, aluminium worm wheels (paired with steel worms) reduce rotating mass. For aerospace worm gears where strength-to-weight ratio is critical, titanium alloy worm gears are available. Surface treatment by anodising, galvanising, powder coating, or polishing to match the application environment.

Contact Fatigue Life

Automotive comfort actuators (window lifters, seat adjusters, mirror fold) cycle 50,000–300,000 times over a 15-year vehicle life. The worm thread and worm wheel tooth must resist pitting fatigue at the contact stress produced by each actuation load. Alloy steel worms (20CrMo, 20CrMnTi) case-carburised to HRC 58–62 achieve the Hertzian contact fatigue life required for these cycle counts — hardened steel provides the fatigue-resistant surface that carbon steel or plastic worm gears cannot match at the same module.

Miniature Module Accuracy

At M0.2–M0.5, the worm thread pitch is so small (pitch = π × module = 0.628–1.571 mm) that gear noise and transmission error become highly sensitive to tooth form errors. Korea Ever-Power's CNC hobbing process at these small modules achieves pitch errors of 2–5 µm — the accuracy level required to produce quiet, smooth automotive worm gear operation at the motor speeds typical of 12V DC automotive comfort actuators (3,000–8,000 RPM at the worm).

Corrosion Resistance in Automotive Environment

Automotive worm gears are exposed to humidity (condensation in door cavities), automotive fluids (window washer fluid, brake fluid in adjacent areas), and salt spray in winter road conditions. Surface treatment by galvanising or zinc-nickel plating provides the automotive corrosion resistance test compliance (salt spray test ASTM B117: 240–500 hours) required by automotive OEM supplier qualification standards.

Self-Locking in Position-Holding Applications

Automotive seat position holders, mirror fold position holds, and window-up end-of-travel positions all benefit from the worm gear's self-locking property. The seat must not drift from the adjusted position when the motor is off; the mirror must hold its angle in wind pressure without motor power. Korea Ever-Power calculates and confirms the lead angle for every automotive worm gear pair to verify self-locking is maintained at the specified motor shaft thread geometry.

Automotive Comfort Actuators

M0.4–M1.0 alloy steel worm gears in electric window lifter drives, power seat front-rear, height, and tilt drives, electric mirror fold and tilt gearboxes, electric tailgate actuators, and convertible roof drive units. Automotive OEM and Tier 1 qualification documentation (PPAP, material certification, dimensional reports) available.

Medical Devices

M0.2–M0.8 stainless steel or alloy steel worm gears in infusion pump drives, surgical instrument actuators, medical bed and chair adjustment drives, portable diagnostic equipment positioning mechanisms. Biocompatibility, non-magnetic, and sterilisation compatibility documentation available.

Industrial and Mechanical

M0.5–M2.2 alloy steel worm gears in industrial robot joint drives, conveyor right-angle drive units, valve actuators, precision positioning drives, and automated assembly machine indexing mechanisms. Full range from miniature instrument drives (M0.2, Φ5 mm) to medium industrial drives (M2.2, Φ120 mm).

Military

Alloy steel and titanium worm gears for military vehicle weapon station traverse and elevation drives, military optical sight positioning mechanisms, and soldier-carried equipment actuators. Full material traceability, certificate of conformance, and first article inspection reports available for defence procurement.

Aircraft

Aluminium alloy and titanium worm gears for aircraft seat adjustment drives (cabin and business class seat recline and tilt), galley equipment drives, and UAV gimbal positioning drives. Lightweight materials, tight tolerance (0.001 mm), and aerospace-standard surface treatments (anodising, chemical film) available.

Precision Instruments

M0.2–M0.5 precision alloy steel or brass worm gears for surveying instrument drives, optical precision equipment positioning mechanisms, and scientific instrument fine adjustment drives. The M0.2 module / Φ5 mm capability represents the smallest worm gear available in metal — enabling drive solutions that no other precision reducer format can provide at this scale.

Are you a factory or trading company?

Korea Ever-Power operates as factory + trade — maintaining in-house manufacturing (CNC turning, hobbing, milling, heat treatment, surface treatment) with direct international sales capability. The factory + trade model gives customers factory-direct pricing without the minimum order quantities of pure factory suppliers, and the single-supplier simplicity of a trading company. With over ten years of experience and hundreds of qualified personnel, Korea Ever-Power is one of China's leading manufacturers and suppliers of automotive precision worm gears.

How do I get a quotation for alloy steel worm and worm gear for auto parts?

Send drawings in DWG, DXF, PDF, or STEP format, together with any requirements (material, surface treatment, tolerance, quantity). Include a detailed PDF if available. Korea Ever-Power will provide professional engineering advice and a competitive quotation. For automotive OEM applications, specify the application (what drive unit, what vehicle programme) so Korea Ever-Power can advise on appropriate precision grade, material, and surface treatment for the automotive operating environment.

What if I don't have drawings — can Korea Ever-Power still produce the worm gear?

Yes — if you don't have drawings, send your sample or pictures with dimensions (length, height, width). Korea Ever-Power will produce a 3D CAD model and a 2D drawing from the sample, for your approval before production begins. Alternatively, send the performance specification (module, ratio, diameter, torque, speed) and Korea Ever-Power's engineering team will produce the design. Customer drawings and samples are kept confidential and not shared with third parties without permission.

How long does it take to get a sample of alloy steel worm gear for auto parts?

7–10 days is the typical sample production time for alloy steel worm gear for auto parts in Korea Ever-Power's standard module range (M0.2–M2.2). Complex configurations or special materials may require additional time — confirm at the quotation stage. Samples are shipped via DHL, TNT, FedEx, or UPS to any destination. Contact Korea Ever-Power with your drawing or specification to begin.

"We are a Tier 1 automotive supplier for electric mirror fold actuators. Specified M0.5 20CrMnTi alloy steel worm gears for auto parts from Korea Ever-Power — carburised HRC 60, galvanised, tolerance 0.005 mm on thread pitch. Sample in 9 days; PPAP submission package (dimensional report, material cert, process FMEA) completed within 3 weeks of sample approval. 500,000-cycle durability test on first production batch: zero pitting, zero backlash change exceeding spec. Qualified supplier now in production."

Kim Sung-jin  |  Automotive Actuator Quality Engineer, Incheon Auto Components Tier 1 Co.  ·  Q1 2026

"We develop UAV gimbal positioning drives and needed titanium alloy worm gears M0.8, Φ22 mm, for a weight-critical payload gimbal. No drawing — sent a broken sample from an existing gimbal. Korea Ever-Power measured and produced a 3D model with drawing in 5 days, confirmed lead angle self-locking at 3.2°, and delivered titanium samples in 9 days. Weight: 2.3 g for the complete worm gear pair. Anodised surface — zero corrosion after 500 hours salt spray at our test lab."

Lee Min-jun  |  UAV Payload Gimbal Engineer, Gyeonggi Aerospace Systems Co.  ·  Q4 2025

"We manufacture precision surgical instruments and use M0.3 SS316L worm gears (Φ8 mm) from Korea Ever-Power in our surgical tool positioning drives. Biocompatibility certification (ISO 10993) and EtO sterilisation compatibility letter supplied within 5 days of request. Thread pitch error measured at 2.1 µm at incoming inspection — within our ±3 µm specification. Delivery via FedEx Priority to our Seoul facility: 2 days from Korea Ever-Power dispatch."

Park Jae-hyeon  |  Surgical Instrument Mechanism Engineer, Busan Medical Devices Co.  ·  Q2 2026