Steel screw gears
Drawing-led crossed helical gears for general machinery where load, sliding, lubrication, and wear are evaluated together.
custom screw gears
Screw Gears
Custom crossed helical or screw gear pairs for transmitting light-to-moderate motion between non-parallel, non-intersecting shafts.
Customization
100% to Drawing / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
Engineering DFM
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Featured Product Model & RFQ Specifications
Custom Screw Gear Pair
Crossed-axis helical screw gears for compact skew-shaft drives, machine adjustments, indexing mechanisms, and light automation equipment.
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
Manufacturing capability
Technical Overview & Engineering Capability for custom screw gears.
Custom screw gears, also called crossed helical gears, transmit motion between shafts that are neither parallel nor intersecting. Their tooth form resembles a helical gear, but the pair operates with sliding contact across the tooth surfaces. ZhongYi reviews screw gear drawings for shaft angle, module, pressure angle, helix angles and hands, tooth counts, ratio, center distance, face width, bore, material, heat treatment, lubrication, and mating compatibility. Because sliding is significant, the operating load, speed, duty cycle, temperature, and material pairing must be described before the manufacturing route is confirmed.
Tooth Accuracy DIN 4-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra ≤0.4µm)
Heat Treatment Carburized 58-62 HRC
Product types & variants
Screw Gears types and manufacturing paths.
The final product form is confirmed from the buyer drawing, mating component, assembly layout, operating conditions, and inspection requirements.
Stainless screw gears
Corrosion-conscious components for suitable environments, with galling and lubrication considered during material selection.
Bronze or mixed-material pairs
Dissimilar materials selected by the mechanism designer to address sliding wear or running behaviour.
Plastic screw gears
Low-mass and potentially quieter components for light-duty applications within the material temperature and load limits.
Selection & Metallurgy guidance
How to specify the correct screw gears configuration.
Do not select a screw gear using a single helical gear drawing. Both helix angles and hands must produce the intended shaft angle and ratio. The design should document center distance, direction of rotation, axial forces, bore and retention, and whether one or both members are supplied. Sliding contact makes lubrication, surface finish, material compatibility, heat generation, and operating duty important. Where load capacity is critical, the buyer should provide calculated requirements or an approved design rather than asking the manufacturer to infer them from outside dimensions.
Material & Heat Treatment Options
- Steel for general screw gear components
- Stainless steel for selected corrosion-conscious assemblies
- Bronze or dissimilar material pairings when specified by design
- Engineering plastic for suitable light-duty mechanisms
Engineering Selection Factors
- Shaft angle, center distance, ratio, and tooth counts
- Module, pressure angle, helix angles, and helix hands
- Sliding velocity, transmitted load, speed, and duty cycle
- Material pair, heat treatment, lubrication, and temperature
- Bore, hub, keyway, mounting, backlash, and inspection
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Screw Gears.
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:
For custom screw gears, ZhongYi can review the mating geometry, drawing datums, material pairing, heat treatment, tooth finishing, and lubrication assumptions before quotation. Inspection requirements may include dimensions, bore runout, tooth thickness, helix-related characteristics, hardness, and trial mesh when defined by the buyer. The page does not claim universal self-locking, high efficiency, or a specific torque capacity because these depend on geometry, friction, material, lubrication, and operating conditions. Clear limitations make the content more trustworthy for engineering procurement.
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
Application fit
Screw Gears operating environments.
Match the gear type with real machinery conditions, operating environment, load, speed, and replacement requirements.
- Machine adjustments and indexing mechanisms
- Packaging, instrumentation, and light automation systems
- Compact skew-shaft transmission layouts
- Special-purpose equipment with modest transmitted power
Application Markets
View All 5 Industry Hubs →
Where Screw Gears Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
🏗️ 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.
🤖 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 technical and purchasing questions for Screw Gears.
These answers support early engineering and procurement review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved drawing file.
Are screw gears the same as worm gears? ▼
No. Screw gears are crossed helical gears, usually with similar gear-like members, while a worm set uses a worm and worm wheel with different geometry. Their ratios, contact, sliding, and applications should be evaluated separately.
What shaft information is required? ▼
Provide the shaft angle, center distance, rotation direction, ratio, helix angles and hands, module, pressure angle, tooth counts, bearing layout, and axial-load considerations for both members.
Which materials work for screw gear pairs? ▼
Steel, stainless steel, bronze, and engineering plastics may be considered depending on load, speed, lubrication, temperature, corrosion, and wear. The final material pair should follow the approved design and operating conditions.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Screw Gears 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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