Description
DZ Series — Compact Vertical Worm Gear Reducer
The DZ Series is a purpose-built vertical-output speed reducer gearbox that stacks the IEC motor directly above the worm housing in a single vertical column. This tower-like arrangement minimises the horizontal footprint to little more than the housing width, making the DZ the natural choice for machines where floor space is scarce but vertical clearance is available — bottling lines, small mixing stations, vertical screw feeders, and overhead trolley drives. Seven frame sizes from WP50 to WP135 and ratios of 5:1 to 60:1 handle motor inputs from 0.18 kW up to 4 kW, covering a wide swath of light-to-medium industrial power-transmission needs.
Where Vertical Compactness Matters
Bottling and Liquid-Fill Lines
Rotary filling turrets, cap sorters, and labelling stations on beverage and cosmetics lines operate in tightly packed machine cells where every centimetre of floor area counts. A DZ at 15:1 or 20:1 sits directly above the turret shaft, leaving the surrounding space clear for product infeed conveyors and reject chutes. This layout is common on filling machines built by Krones, KHS, and Sacmi, where the right angle worm gearbox geometry routes the motor sideways or upward out of the product zone.
Laboratory and Pilot-Plant Equipment
Pilot-scale reactors, ribbon blenders, and small pelletisers in R&D facilities rarely have the luxury of a full-size motor base. The DZ in its smallest frames (WP50–WP70) weighs under 8 kg including motor and mounts directly to the equipment frame with four bolts. Output speeds of 25–300 r/min at ratios from 5:1 to 60:1 match most bench-scale and pilot-scale process needs without requiring a variable-frequency drive for speed trimming.
Performance Specifications
The following data applies at 1,500 r/min input speed. The DZ uses the same WP-platform gear pair and bearing arrangement as the full-frame speed reducer gearbox range, so efficiency curves and lubrication requirements are identical per ratio.
| Frame (mm) | Motor (kW) | Ratios | Torque at 10:1 (N·m) | Peak Torque (N·m) |
|---|---|---|---|---|
| WP50 | 0.18 | 5:1 – 60:1 | 9 | 35 |
| WP60 | 0.37 | 5:1 – 60:1 | 19 | 73 |
| WP70 | 0.37 – 0.75 | 5:1 – 60:1 | 39 | 95 |
| WP80 | 0.75 – 1.5 | 5:1 – 60:1 | 77 | 248 |
| WP100 | 1.5 | 5:1 – 60:1 | 80 | 344 |
| WP120 | 2.2 – 3 | 5:1 – 60:1 | 151 | 521 |
| WP135 | 3 – 4 | 5:1 – 60:1 | 219 | 690 |
DZ vertical assembly showing motor-above-gearbox layout
Construction and Materials
The DZ housing is a one-piece grey cast-iron casting with a machined top face that carries the B5/B14 IEC motor flange and a machined bottom face that serves as the foot pad or mounting flange. The worm shaft is case-hardened 20CrMnTi alloy steel, ground to a surface finish better than Ra 0.8 μm. The worm wheel is centrifugally cast ZCuSn10Pb1 tin-bronze, hobbed and shaved to full-depth involute profile. Tapered roller bearings on both the worm and output shafts handle combined radial and axial loads without supplementary thrust bearings. Oil seals are double-lipped NBR rated to 100 °C continuous, with optional FKM upgrades for chemical or high-temperature service.
Ordering Process
Specify your DZ reducer in four steps. Each step is outlined in the cards below. If you need help at any stage, contact us — our engineers respond within one business day.
Assess the Space
Measure available vertical clearance above the driven shaft. The DZ requires the motor height plus the gearbox depth — typically 250–550 mm depending on frame size.
Size the Reducer
Match your required output torque and ratio to the specification table. Apply thermal and shock-load correction factors for your operating conditions.
Confirm Mounting
Verify that the machine frame can support the combined weight of motor plus reducer in a vertical stack. Add an AS or TV bracket if needed.
Request a Quote
Email the model string (e.g. WPDZ-80-1/20) and motor details to {EMAIL}. We confirm pricing and availability within one business day.
Service and Lubricant Guide
Use ISO VG 220–320 EP gear oil for ambient temperatures up to 40 °C. Shell Omala S2 G 220 and Mobil DTE Oil BB are recommended. Because the DZ operates vertically, verify that the oil level fully submerges the worm-wheel teeth when the unit is installed in its final orientation. Drain and replace the oil after the first 100 hours, then every 2,500 hours or annually. Keep the top-mounted breather plug clear of contamination; a blocked breather causes internal pressure build-up that can push oil past the shaft seals.
About Ever-Power Transmission Australia
Based in Condell Park, NSW, Ever-Power Transmission Australia Pty Ltd stocks the DZ alongside the full single-stage and double-stage WP range. Every unit ships with a factory oil fill, ISO 9001 test certificate, and mounting hardware. We also carry BGV055 compact worm gear reducers for applications that need a compact aluminium-alloy housing at lower weight. Call +61 2 9708 3322 or visit our About Us page to learn more about our capabilities and supply network.
Final assembly and export packing at our facility
