Drive units are the power source behind many construction and concreting tools, such as flexible shaft concrete vibrators and submersible pumps. They’re designed to convert engine power into rotational motion, which is transmitted through a flexible shaft to drive attachments like vibrator shafts or pumps. This makes them essential equipment for jobs requiring concrete compaction or efficient water removal.
In simple terms, a drive unit acts as the “engine” that powers multiple attachments — making it a highly versatile piece of gear for builders, concreters, and civil construction teams.
How Drive Units Work
A drive unit features an engine (petrol or diesel) or motor (battery-powered) encased within a heavy-duty frame. The engine drives a flexible shaft via a three-dog coupling system, delivering high-frequency vibration or rotational energy to the connected tool.
Their rugged design means they can operate on-site under tough conditions — from compacting concrete in footings and slabs to pumping out water from trenches or foundations.
Crommelins offers a comprehensive range of drive units built to suit a variety of site requirements and power preferences.
DU60HP & DU60RP
Reliable petrol-powered models featuring Honda GX200 or Robin EX17 engines. Ideal for driving vibrator shafts and submersible pumps on construction sites.
DU47YD & DU47YDE
Diesel-powered options powered by the Yanmar L48 engine, with the DU47YDE featuring convenient electric start. These are perfect for heavy-duty or remote applications where diesel is preferred.
DU10YDE
A 10 HP Yanmar L100 diesel unit with electric start, designed for the most demanding applications and continuous operation.
DU53BH
The battery-powered option, driven by a Honda GXE 2.0H brushless motor. It offers a quiet, emission-free alternative — ideal for enclosed spaces or noise-sensitive sites.
All Crommelins Drive Units include a heavy-duty sled-mounted frame for stability, anti-vibration rubber mounts, and a full roll cage for protection. They can power both vibrator shafts (up to 75 mm) and submersible pumps (up to 50 mm), offering unmatched flexibility on-site.
Optional Extras
There is also the option to add electric start, mine spec, long range fuel tanks, emergency stop, and central lifting bars/hooks.
Complementary Products
Pair your drive unit with Crommelins Vibrator Shafts — available in 28 mm, 38 mm, 45 mm and 60 mm diameters. Designed for fast, effective concrete compaction in footings, slabs, and stairways, these shafts feature:
- Strong, durable construction for demanding jobs
- High-tension spring coupling for longer life
- Protective spirals to minimise kinking and damage
- Two-piece oil seals to prevent grease seepage
Available in 6 m lengths (with 9 m optional) and compatible with all Crommelins three-dog drive units.
Crommelins Flexible Drive Submersible Pumps
For dewatering applications, attach a Crommelins Flexible Drive Submersible Pump. These 50 mm (2”) pumps move up to 56,000 L/h and can handle solids up to 25 mm. Built for durability, they feature a cast iron or aluminium casing, wide suction passages, and a 6 m flexible shaft. Connect a hose and you’re ready to go. Ideal for pumping water from footings, manholes, tanks, and drainage sites.
Why Choose Crommelins
For decades, Crommelins Machinery has been trusted by Australian trades and hire companies for its durable, easy-to-maintain equipment. The Crommelins drive unit range offers:
- Compatibility with multiple tools
- Heavy-duty construction built for Australian conditions
- Reliable Honda, Robin, and Yanmar engines
- Local parts, service, and warranty support
Whether you’re compacting concrete or managing water on-site, a Crommelins drive unit paired with the right attachments ensures performance, reliability, and efficiency every time.
Explore the Range
Discover the full range of Crommelins Drive Units, Vibrator Shafts, and Flexible Drive Submersible Pumps online. Ask about the range at your local hire shop or Crommelins dealer.
