Email
WhatsApp
Solid input shaft version of the BKM helical hypoid gearbox series. Built for driven machines where the input comes from a belt pulley, chain sprocket or coupling, not a direct bolt-on motor.
BKM HS series uses the same helical hypoid gear set as the standard BKM, but the input side is a solid shaft with a keyway instead of a hollow input with a motor flange. This lets the gearbox take power from a belt pulley, chain sprocket, coupling or line shaft on the driven machine, which is common on conveyors, mixers and industrial drives where the motor sits further away. Frame sizes 050 to 130, power 0.2–7.5 kW, and up to 1500 Nm output torque.
From the driving pulley on the input shaft to the output flange, the BKM HS unit passes through five functional stages. Each stage has a specific role in torque transfer and alignment.
Keyed input shaft takes power from a pulley, sprocket or coupling.
Rigid bearing pair supports the input shaft under belt or chain tension.
Hypoid pinion and gear set off the output at 90° with a higher single-stage ratio.
Helical gears continue the ratio reduction and keep the mesh smooth.
Output flange or solid output shaft delivers torque to the driven machine.
Both versions use the same hypoid gear set and the same housing footprint. The difference is only on the input side.
Solid input shaft version. Power enters through a keyed shaft from a pulley, sprocket or coupling. Used when the motor is mounted elsewhere on the machine, or when the machine uses a line shaft to drive several gearboxes at once.
Hollow input with a standard IEC motor flange. The motor bolts directly to the gearbox, which removes the need for a separate coupling. Used when the motor sits next to the driven machine.
Core parameters of the BKM HS series shaft-input helical hypoid gearbox. Full dimensional drawings are available on request.
Six frames cover the full range. Frame 050 to 090 use die-cast aluminium housings. Frame 110 and 130 use cast iron housings for higher rigidity under heavy or shock-loaded axes.
BKM HS shaft-input units are used whenever the drive motor cannot be mounted directly on the gearbox, or when one line shaft drives several machines at once.
Belt and roller conveyors where the motor is mounted on the frame and the gearbox is driven through a belt or chain.
Multi-station machines where one motor drives several gearboxes through a shared line shaft.
Secondary axes on packaging lines where the gearbox is driven by a timing belt from the main drive.
Process mixers where the motor is mounted separately on the vessel frame and the gearbox is driven through a coupling.
Feed rollers on woodworking machines where the motor sits above the machine and drives the gearbox by belt.
Cleaning, dosing and transfer axes on food lines, with food-grade lubricant available on request.
Sorter transfer units and cross-belt drives where a shaft-mounted gearbox takes power from a line shaft.
Replacing an existing gearbox on a machine where the input came through a shaft, not a flanged motor.
Every BKM HS unit is inspected for housing bore concentricity, gear tooth geometry, backlash, leak tightness and noise before packing. Material certificates and third-party inspection are available.
ISO 9001:2015 certified quality management from raw material to final assembly. Products comply with IEC, DIN and GB gear standards.
Common questions about shaft input, BKM vs BKM HS, mounting and customisation.
Provide input power, output torque, required ratio, input shaft drawing, mounting position and driven machine description. Raydafon will confirm the correct BKM HS frame, ratio and shaft geometry, and reply with a factory-direct quotation within 24 hours.
Address
Luotuo Industrial Area, Zhenhai District, Ningbo City, China
Tel
