🏗️ Heavy-Duty & High-Impact Transmission
Construction & Mining Machinery
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
custom screw gear manufacturer
Custom Screw Gear Pair
Crossed-axis helical screw gears for compact skew-shaft drives, machine adjustments, indexing mechanisms, and light automation equipment.
Customization
100% to CAD / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
DFM Analysis
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Product overview
Custom Screw Gear Pair manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
Custom screw gears, commonly referred to as crossed helical gears, are helical gears that mesh on non-parallel, non-intersecting (skew) shafts, most frequently oriented at 90 degrees. Unlike spur or parallel helical gears where tooth contact is a line, crossed helical gears engage with theoretical point contact, resulting in significant sliding velocity along the tooth flanks. ZhongYi manufactures custom screw gears from technical drawings, CAD data, or physical samples. The design and manufacturing review focuses on shaft angle (Σ), center distance, normal module (Mn), helix angles and hands for both gears (e.g., both same hand for 90° shaft angle), face width, bore and keyway configurations, dissimilar material pairings, surface finish, and lubrication requirements.
Tooth Accuracy DIN 5-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra ≤0.4µm)
Hardness Grade Carburized 58-62 HRC
Custom Screw Gear Pair Factory Genuine Spec
Selection guidance
How to specify a custom screw gear pair for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Confirm the required shaft angle (Σ) and shaft rotation direction. For a 90° crossed-axis setup with identical 45° helix angles, both mating gears must have the same helix hand (both RH or both LH). Because tooth contact is point contact with continuous sliding, calculate transmitted torque conservatively to avoid excessive flank wear. Pairing dissimilar materials—such as a hardened steel driver with a phosphor bronze or engineering plastic driven gear—improves sliding wear life and reduces galling risk under oil or grease lubrication.
Technical specifications
Core technical parameters for engineering and procurement review.
| Product type | Crossed helical screw gear pair for skew / non-intersecting shafts |
|---|---|
| Shaft angle (Σ) | Standard 90° crossed shaft angle, or custom acute/obtuse skew angles by drawing |
| Tooth parameters | Normal module (M0.8 - M8), normal pressure angle (20°), helix angles (β1, β2) and hands |
| Ratio range | 1:1 ratio for direction change, or reduction ratios up to 1:5 for light drives |
| Materials | Carbon steel (1045), alloy steel (40Cr, 42CrMo), stainless steel (304/316), bronze (CuSn12), POM / Nylon |
| Mounting details | Finished bore with keyway, clamping collar hub, setscrew, or integral shaft journals |
Custom options
Manufacturing details that can be reviewed before quotation.
- Steel-on-steel, steel-on-bronze, or steel-on-polymer material pairings to control sliding friction
- Right-hand (RH) or Left-hand (LH) helix combinations matching the required shaft angle and rotation
- Precision hobbed, induction hardened, or surface-coated tooth flanks
- Bored and keywayed hubs, setscrew holes, or integral pinion shaft construction
- Custom small-batch manufacturing for legacy machine repair or specialized OEM equipment
Quality control
Inspection points tied to the approved technical file.
- Calculation verification of normal module, helix angles, center distance, and shaft angle relationship
- Tooth thickness, helix lead angle, and bore concentricity inspection against approved drawings
- Surface finish (Ra) measurement on tooth flanks to ensure smooth sliding contact
- Hardness testing, material certification, and protective packaging for shipment
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Screw Gear Pair.
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
Screw gear quality requires careful verification of helix angles, tooth surface roughness, and center distance compatibility. Inspection reports confirm bore tolerances, keyway positions, normal tooth thickness (over-pin dimension), and surface condition. ZhongYi reviews lubrication assumptions and operating loads with the customer to ensure reliable component manufacturing.
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ±0.002 mm.
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fα), lead crowning (fβ), pitch cumulative error (Fp), and radial runout (Fr).
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58–62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
Direct-Reading Optical Spectrometer
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
Inspection Deliverables with Every Shipment
Complete Batch Traceability & Certified Test Reports
- EN 10204 Type 3.1 Mill Test Certificate (Chemical & Mechanical Properties)
- Zeiss 3D CMM Full Dimensional Inspection Sheet
- Klingelnberg Tooth Profile & Lead Crowning Graph Report
- Effective Carburized Case Depth & Hardness Curve Data
- 100% Pre-Shipment Visual, Thread & Anti-Rust Quality Verification
Our Factory Quality Commitment:
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
ISO 9001:2015 Certified
DIN 4-7 / AGMA 11-13 Standards
Applications
Custom Screw Gear Pair operating environments.
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
- Packaging machinery timing adjustments, guide rail width adjusters, and feeder drives
- Office equipment, commercial machinery, and printing press auxiliary drives
- Textile machinery, winding mechanisms, and mechanical positioning controls
- Compact instrumentation drives and light-duty skew-shaft power transmissions
Application Markets
View All 5 Industry Hubs →
Where Custom Screw Gear Pair Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
🤖 Sub-Arcminute Motion & Dynamic Positioning
Automation & Robotics
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
🌾 Rugged Heavy-Torque Transmission
Agriculture & Farm Equipment
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Technical FAQ
Common questions before ordering custom screw gear pair products.
Critical specifications are confirmed against final drawings before production.
How do helix hands work for 90-degree crossed helical screw gears? ▼
When shafts cross at 90° and both gears have 45° helix angles, both gears must have the SAME hand (both right-hand or both left-hand). This differs from parallel-shaft helical gears, which require OPPOSITE hands.
Why are screw gears limited to light-to-moderate loads? ▼
Crossed helical teeth make point contact rather than line contact, causing high localized contact stress and significant sliding velocity. For heavy torque transmission at 90°, a worm gear set or hypoid/spiral bevel set is recommended.
What lubricants should be used for crossed helical gears? ▼
High-viscosity gear oils with EP (extreme pressure) additives or synthetic greases containing anti-wear agents are recommended to maintain an effective lubricating film during sliding contact.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Screw Gear Pair Manufacturing
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Supported CAD Blueprint & Drawing Formats:
STEP (.step / .stp) AutoCAD (.dwg / .dxf) IGES (.igs) SolidWorks / 3D CAD PDF Technical Blueprints Worn Physical Samples
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
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