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.
Product overview
Technical overview of 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.
Product types
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 guidance
How to specify the correct 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 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
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
Applications
Screw Gears application fit.
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
Quality and technical verification
Inspection requirements tied to approved technical data.
Useful engineering evidence is more valuable than unsupported quality claims. Critical checks, records, and acceptance criteria are defined from the drawing and purchase requirement.
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.
All products can be custom manufactured from drawings or samples.
Buyer FAQ
Common technical and purchasing questions.
These answers support early technical review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved file for each enquiry.
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.
Custom manufacturing
Send drawings or samples for technical review.
ZhongYi can review geometry, material, heat treatment, bore, keyway, tooth profile, application conditions, and order quantity before quoting.
Related product categories
Request a quote
Send drawings, samples, or technical requirements for review.
Our team can review your gear type, material, heat treatment, tolerance, order quantity, and application conditions before quotation.