Helical Gears
Gear, Rack & Synchronous Drive Series
Product overview
Helical gears for smoother and quieter parallel-shaft transmission, available in right-hand and left-hand tooth directions. This page is prepared for model identification, preliminary selection and quotation. The exact production configuration should be confirmed before order placement.
24 standard modelsKey features
- Improved contact ratio compared with straight teeth
- Right-hand or left-hand helix
- Ground or hobbed tooth options
- Custom material and heat treatment
Standard & custom
Stock standard sizes plus drawing-based variants.
Matched supply
Mating parts supplied together to guarantee fit.
Inspected before shipment
Critical dimensions checked; reports on request.
Specifications
Models & specifications
Values are nominal; confirm final dimensions against the approved drawing.
| Model | Module | Teeth | Helix Angle | Hand | Material |
|---|---|---|---|---|---|
| HEL-M4-Z40-RH | 4 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M4-Z30-LH | 4 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M4-Z25-LH | 4 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M4-Z20-RH | 4 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M3-Z40-RH | 3 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M3-Z30-LH | 3 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M3-Z25-LH | 3 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M3-Z20-RH | 3 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M2.5-Z40-RH | 2.5 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M2.5-Z30-LH | 2.5 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M2.5-Z25-LH | 2.5 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M2.5-Z20-RH | 2.5 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M2-Z40-RH | 2 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M2-Z30-LH | 2 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M2-Z25-LH | 2 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M2-Z20-RH | 2 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M1.5-Z40-RH | 1.5 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M1.5-Z30-LH | 1.5 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M1.5-Z25-LH | 1.5 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M1.5-Z20-RH | 1.5 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M1-Z40-RH | 1 | 40 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
| HEL-M1-Z30-LH | 1 | 30 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M1-Z25-LH | 1 | 25 | 19°31′42″ reference / custom | LH | C45 / alloy steel |
| HEL-M1-Z20-RH | 1 | 20 | 19°31′42″ reference / custom | RH | C45 / alloy steel |
Typical applications
Machine toolsAutomation drivesReducersHigh-speed machinery
Selection guide
- Confirm the transmission type, load, speed and duty cycle.
- Choose model / module / pitch and the matching mating part (chain–sprocket, rack–pinion, belt–pulley, rail–block).
- Specify bore, keyway, length, material, heat treatment and surface finish.
- Send drawings or samples for non-standard parts; we confirm feasibility and quote.
Have a drawing, sample or model number?
Send it to our engineering team — we confirm the specification and reply with a quotation.