Designed to IS 3938 | Load-tested at 125% | Documented | Since 1998
R K Engineering Works designs and builds electric wire rope hoists in Jaipur for factories, plants and warehouses across Rajasthan and North India. Each hoist is engineered for your load, your lift height and how many hours it will work each day. It is made to IS 3938, tested at 125% of its safe working load in our works, and handed over with drawings and test certificates. A hoist is the heart of a crane: when it is right for the duty, lifting is smooth, safe and steady for many years.
Request an engineering consultation | Book a site survey
Where our wire rope hoists work
- On single girder and double girder EOT cranes
- On gantry, semi-gantry and goliath cranes
- On monorail beams for assembly lines and loading bays
- On underslung cranes and jib cranes
- As fixed (foot-mounted) hoists for lifting through a floor opening or for pulling
Hoist types we build
| Type | Suited to | Notes |
|---|---|---|
| Monorail hoist with trolley | Single girder EOT cranes, monorail beams | Simple, easy to service; push or motorised trolley |
| Low headroom hoist | Sheds with a short roof height | Hoist sits beside the beam so the hook goes higher |
| Double girder hoist trolley (crab) | Double girder EOT and goliath cranes | Highest hook height and heavier duty |
| Foot-mounted / fixed hoist | Fixed lifting points, pits, floor openings | Mounted on a frame or floor; no travel |
| Twin hook or main + auxiliary hoist | Long loads, turning jobs, mixed loads | Two hoists work together or apart, with interlocks |
Duty class – the most important choice
IS 3938 puts electric wire rope hoists into four classes, based on how often the hoist is used, how heavy the usual loads are, and how much shock it takes.
| IS 3938 class | Typical use | Wire rope factor of safety |
|---|---|---|
| Class 1 | Light use – maintenance lifting, stores | Not less than 4.5 |
| Class 2 | Moderate use – general workshops, assembly | Not less than 5 |
| Class 3 | Heavy use – production lines, fabrication shops | Not less than 5 |
| Class 4 | Very heavy use – steel, cement, power plant service | Not less than 6 |
| Hot metal handling | Molten metal or dangerous liquids | Not less than 8, plus an extra hoisting brake |
How our hoists are built
- Wire rope to IS 2266, with the factor of safety for the class.
- Grooved rope drum so the rope winds in one neat layer, with a rope guide.
- Enclosed oil-bath helical gearbox made in our own works.
- Crane-duty hoist motor rated for the class, with insulation and IP rating for your site.
- Fail-to-safe electromagnetic brake – holds the load if power fails.
- Forged hook with safety latch and thrust bearing.
- Controls: pendant or radio remote; two-speed or VFD for soft start and fine placing.
Safety built in
- Upper limit switch so the hook block cannot hit the drum
- Lower limit switch so the rope never fully unwinds
- Fail-to-safe brake on the hoist motion
- Overload protection (load limiter on request, recommended for production duty)
- Undervoltage protection and motor overload relays
- Emergency stop on pendant or remote
- Second brake for hot metal or dangerous loads
Testing and documents you receive
| Stage | What we do |
|---|---|
| Design | GA drawing and design calculations shared for approval |
| Materials | Mill test certificates; rope and hook test certificates |
| Works test | Load test as per IS 3938 at safe working load and at 125% |
| Brake test | Brake holds 125% of safe working load |
| Limit switch test | Upper and lower limits checked and set |
| Site test | After erection, overload test at 125% under full control, in your presence |
| Handover | Test certificates, QAP, O&M manual, spares list |
Industries and areas
Steel and re-rolling mills, cement plants, power plants, automobile and auto parts, pharma and FMCG factories, engineering and fabrication shops, warehouses and logistics parks, pumping stations, and Railway and PSU workshops – in Jaipur (VKI, Sitapura, Bagru, Kaladera, Mansarovar), all RIICO areas of Rajasthan and across North India. We support every hoist for life through our crane AMC in Jaipur, and upgrade old hoists with new rope, hook, limits, brake, VFD control or a full new hoist.
Frequently asked questions
Which Indian Standard applies to electric wire rope hoists?
IS 3938 covers classes, design, safety devices and tests. When the hoist is part of an EOT crane, the crane is also designed to IS 3177 and IS 807.
Wire rope hoist or chain hoist – which should I choose?
Chain hoists suit light loads, short lifts and occasional use. Wire rope hoists suit higher capacities, greater lift heights, faster speeds and long daily hours. See our guide: wire rope hoist vs chain hoist.
Can you fit a new hoist on my existing crane?
Yes, in most cases. We check the girder, end carriages and electrics first, then propose a hoist that matches the crane’s structure and your new duty.
Request an engineering consultation – price shared on request after a site study. Main page: EOT crane manufacturer in Jaipur.