WPWDKT Series Universal Speed Worm Gearboxes

In Australian industrial applications where a conventional solid-shaft reducer cannot be accessed for maintenance or motor replacement without disturbing the driven load, the WPWDKT series universal worm gearbox solves the problem with a split-housing (P-type) design combined with a hollow output shaft and dual input access. Covering frame sizes 40 through 250, gear ratios from 10:1 to 60:1, and input power from 0.06 kW to 15 kW with output torque reaching 3,000 N·m, the WPWDKT is a versatile right-angle worm reducer used by Australian manufacturers across Sydney, Melbourne, and Brisbane in food, ceramics, chemicals, packaging, dyeing, woodworking, and glass industries. The cast-iron split housing — assembled from two precision-machined halves — allows the worm gear set to be inspected, adjusted, or replaced without removing the reducer from its machine mounting, reducing planned maintenance downtime by up to 50% compared with integral-housing designs. Supplied by Ever-Power Worm Gear Reducer Co., Ltd. (Australia), 27 Harley Crescent, Condell Park NSW 2200, with full engineering support and fast dispatch to all Australian states.

Key Specifications & Parameters — WPWDKT Series Worm Gearbox

What Is the WPWDKT Series and How Does the Model Code Work?

The WPWDKT designation follows a structured naming convention used across the WP worm gearbox family. Understanding the code allows procurement engineers and maintenance managers to specify the exact configuration required:

The split-housing design of the P-type is the defining advantage of the WPWDKT over standard integral-housing WP units. Because the housing splits along a plane through the worm shaft axis, the top half of the housing can be lifted clear to expose the full worm gear assembly — worm wheel, worm shaft, bearings, and seals — without disturbing the bottom half which remains bolted to the machine base. This enables worm wheel inspection, measurement of wear, or replacement of the bronze gear set without dismounting the reducer from the machine, removing the motor, or disturbing alignment. For Australian manufacturing facilities operating 24/7 shifts where maintenance windows are short, this translates to a direct reduction in planned downtime.

Key Structural Features of the WPWDKT Worm Gearbox

The WPWDKT series incorporates several structural design features that distinguish it from both standard WP integral-housing units and competing split-housing reducers in the Australian market:

• High Transmission Ratio in Compact Form Factor: Worm gear drives achieve large transmission ratios — up to 60:1 in a single stage — that require three or four gear stages in parallel-axis helical designs. The WPWDKT delivers this ratio in a right-angle, single-stage arrangement that is significantly more compact than an equivalent-ratio helical gearbox, an important advantage in the space-constrained machine designs common in Australian packaging and food processing plants.
• Line Contact at Worm Mesh: The worm and worm wheel engage in line contact (as opposed to the point contact of staggered-shaft helical gears), distributing load across a larger area of the bronze tooth face. At equivalent torque, this results in lower contact stress and extended wear life. The WPWDKT worm mesh is designed per AGMA 6034 contact stress calculation methods, with the bronze gear rated for the full catalogue output torque at the specified ratio.
• Self-Locking at Ratios 20:1 and Above: The worm lead angle in WPWDKT units at ratios of 20:1 and higher is below the equivalent friction angle (approximately 6°), providing mechanical self-locking — the output shaft cannot be back-driven by a static load. This property is utilised in Australian hoist, lifting, and gate-actuator applications where load holding without power is required.
• Multi-Direction Universal Mounting: The “W” universal designation confirms the WPWDKT can be installed in any of six standard orientations — worm above wheel, worm below wheel, vertical input shaft, vertical output shaft, and combinations — without modification. Multiple oil-fill and drain ports are provided for each mounting position. This flexibility reduces machine design constraints and simplifies orientation changes during equipment upgrades.
• Low Noise and Vibration: The sliding meshing action of the worm-on-bronze contact is inherently smoother than gear impact in spur or helical gears, producing operating noise levels typically below 72 dB(A) for sizes up to 110. This is below the 85 dB(A) continuous noise exposure standard referenced in Australian Standard AS/NZS 1269, simplifying compliance for workplace health and safety requirements at Sydney, Melbourne, and Brisbane facilities.

How to Select the Right WPWDKT Frame Size and Ratio

1. Calculate Required Output Torque: T_out = (P × 9550 / n_out) × SF, where P = motor kW, n_out = required output rpm, SF = service factor (1.25 smooth, 1.5 moderate shock, 2.0 heavy shock). Match to the WPWDKT frame size with equal or greater rated output torque at your chosen ratio.
2. Confirm Hollow Shaft Bore: The hollow shaft must match or be bored to your driven machine shaft diameter. Available bores range from 20 mm (size 40) to 75 mm (size 250). Specify bore diameter, key dimensions (DIN 6885 standard), and setscrew requirement at order.
3. Check Thermal Rating: In Queensland and Western Australian summer conditions (ambient above 35 °C), verify that the frame’s thermal rated power meets or exceeds your motor input power. If marginal, specify synthetic lubricant or the next larger frame size.
4. Verify Split-Housing Need: If machine layout permits direct access to the full reducer for maintenance without the split housing, a standard integral WPWKT unit may be more cost-effective. Specify WPWDKT specifically where top-access maintenance is required or where periodic worm wheel inspection is part of the planned maintenance programme.

Accessories We Also Supply: IEC motor adaptor flanges, hollow shaft bore extensions, torque arm kits, replacement worm wheel assemblies, and split-housing gasket sets. Contact Ever-Power Australia for a combined supply quote.

Applications of the WPWDKT Worm Gearbox in Australian Industry

Maintenance Advantages of the Split-Housing Design

The WPWDKT’s split housing delivers a measurable reduction in planned and unplanned maintenance time versus integral-housing worm reducers. The table below compares maintenance task time for the WPWDKT against an equivalent integral-housing WP unit:

Customer Reviews — WPWDKT Universal Worm Gearbox

Why Choose Ever-Power for WPWDKT Worm Gearboxes in Australia?

Ever-Power Worm Gear Reducer Co., Ltd. (Australia), 27 Harley Crescent, Condell Park NSW 2200, stocks WPWDKT units across the most common frame sizes and ratios for fast dispatch. Our engineering team provides free selection support, and all units are backed by a 12-month warranty. Learn more on our About Us page. For extended technical documentation visit worm-gearbox.top.

Frequently Asked Questions — WPWDKT Series Universal Worm Gearbox