WPKS Single Speed Cast Iron Worm Gearbox — WP Series

When your application combines a top-entry input shaft with a through-bore hollow output — scenarios common in vertical mixer shafts, overhead fan drives, and shaft-mounted conveyor equipment — you need a gearbox that handles both without compromise. Standard product catalogues force you to choose between S-type input (WPS) or K-type hollow output (WPKA), but never both in the same unit. The WPKS Single Speed Cast Iron Worm Gearbox combines the S-type upward input configuration with the K-type hollow through-bore output, providing machine designers with a unique configuration that eliminates two separate gearbox specifications and creates cleaner, more compact drive train layouts for challenging vertical and overhead applications.

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■ Unique K+S Configuration: Hollow Output + Top-Entry Input in One Unit

The WPKS is the only standard cast iron worm gearbox offering both S-type input (from above) and K-type hollow bore output simultaneously. This eliminates the need for custom gearbox modifications or tandem gearbox arrangements.

■ Oil Lubrication Calibrated for Combined K+S Geometry

The intersection of S-type worm shaft orientation and K-type hollow output bore creates a unique internal geometry. The WPKS oil channels and seal arrangement are specifically designed for this combination.

■ Hollow Bore Diameter Range: 18.8 mm to 90 mm

The K-type hollow output bore scales across the full 12-size range (40–250 mm centre distance), accommodating the full spectrum of industrial through-shaft diameters from small agitator stubs to large industrial fan shafts.

■ Torque Arm Boss on Housing

The WPKS housing includes a torque arm mounting point to prevent housing rotation when the unit is shaft-mounted. This is essential for the shaft-mount installation mode common in WPKS applications.

■ Same FC20+ Housing as WPA, WPS, WPKA

Despite the combined S+K specification, the WPKS housing maintains the standard FC20+ cast iron specification — no compromise on housing material strength or vibration damping to achieve the combined input/output configuration.

■ Full Ratio Range Available

All standard ratios (1/5–1/60) are available in the WPKS, matching the full range of single-speed WP-series variants for complete application coverage.

☵ Overhead Fan Shaft Drives

Fan shaft installations where the motor must mount above the gearbox while the fan shaft passes through the hollow output bore represent the ideal WPKS application: S-input (motor overhead) + K-output (fan shaft through-bore).

⚊ Vertical Conveyor Shaft-Mount Drives

Vertical conveyor drive stations where the motor is positioned overhead and the conveyor shaft passes through the gearbox output bore use the WPKS to achieve the most compact vertical drive arrangement possible.

⚒ Ceiling-Mounted Agitator Drives

Processing vessel agitators with ceiling-mounted motors and shaft-mount gearbox connections benefit from the WPKS configuration: motor connects from above (S-input), agitator shaft inserts into hollow bore (K-output).

⚛ Turntable & Indexer Overhead Drives

Overhead-drive turntables and indexing tables — used in automotive paint lines and assembly automation — use the WPKS to mount the motor overhead while the central pivot shaft passes through the K hollow bore.

⚔ Compact Vertical Mixer Drives

Industrial food mixers with vertical overhead motor mounting and shaft-mount to the mixing element use the WPKS as the single-unit solution for this common food equipment drive architecture.

✎ ISO 9001:2000 Certified

We hold ISO 9001:2000 International Quality System Certification — the first in our industry category to achieve this standard. Every WPKS is manufactured, assembled, and tested under this quality framework.

✎ CE Marking

Full CE marking confirms compliance with EU Machinery Directive 2006/42/EC requirements — covering safety, design standards, and manufacturing quality for mechanical power transmission equipment.

✎ Pre-Shipment Testing

Every unit undergoes: Noise test (below 68 dB(A) at rated load), Oil leak test (30-minute pressurisation), and Torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.

✎ FC20+ Material Certification

Housing castings are verified by material test certificates for FC20 grade (220 MPa minimum tensile strength). Hardness testing (160–200 HB) and ultrasonic testing for internal defects are performed on size 135 and above.

“WPKS-120 units on our industrial exhaust fan drives — motor overhead, fan shaft through the K bore. This configuration eliminated two 90° bends in our ductwork because we could align everything on a single vertical axis. The gearbox has run perfectly for 22 months.”

“We needed an overhead motor with a through-shaft output for our new dough mixer design. The WPKS was the only standard catalogue product that did both without customisation. Saved us six weeks of engineering time and eliminated a custom component from our BOM.”

“WPKS-100 drives our sterile vessel agitators. The overhead motor keeps electrical equipment out of the process zone and the hollow bore goes directly onto the agitator shaft. An elegant solution to a challenging drive architecture requirement.”

“Used WPKS on our ceiling-mounted turntable drives. The S-input and K-output in one unit significantly reduced our machine height versus the previous two-gearbox arrangement. Cast iron build quality is solid and consistent across multiple production batches.”