Ever Power · Industrial Gear Solutions
Helical Gearbox Series
Precision-engineered inline, right-angle, parallel-shaft and helical-worm gear reducers covering 0.12–200 kW motor power and output torque up to 50,000 N·m — built for industrial production lines worldwide.
Four Series, One Standard of Precision
Ever Power's helical gearbox programme spans four complementary series — R, K, F, and S — each optimised for a distinct set of installation geometries, torque demands, and speed-reduction requirements. All series share the same design philosophy: hardened and ground gear teeth, precision-matched roller bearings, and a rigid cast-iron housing machined on a single datum for long-term alignment stability.
Each series is offered in multiple structural types (foot-mount, flange-mount, hollow-bore shaft-mount, torque-arm) to fit without custom engineering into the widest possible range of machine frames. VFD compatibility is standard, and IP65 sealing with food-grade or ATEX variants is available on request. Learn more about our engineering capabilities on the Ever Power about page, or contact our technical team for application support and selection assistance.
96–97%
50,000 N·m
Max Output Torque
0.12–200 kW
Motor Power Range
IP55 / IP65
Standard Protection Rating
Product Categories
Browse by Gear Reducer Series
R Series — Inline Helical Gear Reducer
Coaxial input-to-output layout; up to 3 helical stages; 96–97% per-stage efficiency; output torque to 18,000 N·m. Structural types: R (foot), RF (flange), RA (hollow shaft), RX (single-stage), R-R combined, R-SZ input shaft. Motor power: 0.12–200 kW; ratios: 1.3–289.
Structural Types
R — Foot Mount
RF — Flange
RX — Single Stage
RXF — Flange Single
R+R — Combined
R-SZ — Input Shaft
K Series — Right-Angle Helical Bevel Gear Reducer
Helical pre-stages feeding a spiral bevel gear set for 90° output; output torque to 50,000 N·m; 95–97% efficiency. Structural types: K (foot), KF (B5 flange), KA (hollow bore), KAF (flange + hollow), KAB (compact hollow), KAT (torque arm), K-R combined, K-SZ. Motor power: 0.12–200 kW; ratios: 5.36–197.
Structural Types
K — Foot Mount
KF — B5 Flange
KA — Hollow Bore
KAF — Flange+Hollow
KAB — Compact
KAT — Torque Arm
K+R — Combined
K-SZ — Input Shaft
F Series — Parallel Shaft Helical Gear Reducer
Parallel input-output axes; ideal for tight-clearance horizontal conveyor drives; output torque to 30,000 N·m; 96–97% efficiency. Structural types: F, FF (flange), FA (hollow), FAF, FAT (torque arm), F-F combined, F-R combined, F-SZ. Motor power: 0.12–160 kW; ratios: 3.77–59.14.
Structural Types
F — Standard
FF — Flange
FA — Hollow Bore
FAF — Flange+Hollow
FAT — Torque Arm
F+R — Combined
F-SZ — Input Shaft
S Series — Helical-Worm Gear Reducer
Helical pre-stage combined with worm gear output for high reduction ratios and quiet right-angle drive; output torque to 3,500 N·m; 75–82% overall efficiency — notably higher than conventional worm-only reducers. Structural types: S, SF, SA, SAF, SAT, S-SZ. Motor power: 0.12–15 kW; ratios: 8.74–196.
Structural Types
S — Standard
SF — Flange
SA — Hollow Bore
SAF — Flange+Hollow
SAT — Torque Arm
S+R — Combined
S-SZ — Input Shaft
Which Series Is Right for Your Application?
Use the quick-reference table below to match your installation geometry, torque class, and efficiency requirement to the appropriate series. Our application engineers are available via the inquiry form for selection support at no charge.
| Series | Output Direction | Max Torque | Ratio Range | Efficiency | Typical Use Case |
|---|---|---|---|---|---|
| R Series | Coaxial (inline) | 18,000 N·m | 1.3–289 | 96–97% | Conveyors, mixers, elevators |
| K Series | Right-angle (bevel) | 50,000 N·m | 5.36–197 | 95–97% | Agitators, screw conveyors, packaging |
| F Series | Parallel offset | 30,000 N·m | 3.77–59 | 96–97% | Belt conveyors, logistics, roller tables |
| S Series | Right-angle (worm) | 3,500 N·m | 8.74–196 | 75–82% | Food machinery, pharmacy, small conveyors |
Why Engineers Choose Ever Power
Precision Manufacturing
Case-hardened and ground gear sets, DIN 5–6 quality, single-datum housings machined to guarantee long-term alignment.
Broad Configuration Range
Foot, flange, hollow-bore, torque-arm, combined, and input-shaft-only variants — most applications need no custom engineering.
Global Export Ready
CE compliance, ISO 9001 quality system, IEC motor flange compatibility, and ATEX variants available for hazardous-area installations.
Minimum order value USD 1,500; single-unit samples welcome. Standard configurations ship in 10–25 working days. EXW, FOB, CIF, DAP available.
Need a Gear Reducer for Your Production Line?
Send us your motor power, required output torque, speed ratio, and installation geometry — our engineers will recommend the right series and model, free of charge.