REVA Electric Wire Rope Hoist is widely recognised by the industry for its performance. It is compact and cost effective and has been designed keeping in view the customer needs. Optimum use of electrical energy has been taken into account for achieving speeds with liberal margins for voltage fluctuations, ambient temperature, gear
efficiency etc.
1 .FRAME
Steel plate & sheet fabricate d rugged in construction machined and bolted
2. GEAR CASES
Gear cases are fabricate`d duly shot blasted, stress relieved and machined on upto date CNC machining centre.
3. GEAR AND PINIONS
REVA choose to make all their Gears & Pinions in-house ensuring their quality, compatibility & serviceability, all gears and pinions integral with shafts are made from case-hardening low-carbon allow steels and are hardened to 56-60 HRC. These are helical & profile ground for running in oil bath to give noiseless movement with maximum efficiency to save on consumed electricity. All gears and pinions confirm to DIN-7/ AGMA-12 standard.
4. ROPE DRUM
DruJln from seamless steel pipe or fabricated from steel plates, revolves on heavy-duty self-aligning roller bearings. The machined spiral grooves accommodate rope in one layer allowing two full turns of rope in the drum when the hook is at the lowest position~ Drum size corresponds to relevant IS.
5. ROPE GUIDEAND RETAINER
Casted rope guide leads the rope into spiral grooves m the drum and retains it in the grooves preventing over-lapping on or loosening off the drum.
6. WIRE ROPE
Ungalvanised extra flexible wire rope of 6×37-6×36 construction of breaking strength l8OKg/ mm2 made of best plough steel conforming to IS: 2266 with factor of safety appropriate to the class of duty is used for every wire rope hoist.
7. HOOK BLOCK
Standard forged trapezoidal section hooks conforming to IS 381 5/TS: 8610 are used. Hook is carried in steel cross head on the thrust ball bearing. The hook sheaves are supported on ball bearings. Sheaves dimensions correspond to relevant IS.
8.MOTORS & BRAKES
High starting torque, crane duty, totally enclosed squirrel cage induction motors, in international frame sizes of Crompton make are used. Motors conform to IS.3. 25 , All motors used are $4 duty suitable for 415 ±10% V, 50 ±5% Hz, 40% CDF, 150 starts/hour, 50°C AMS temperature, Motors suitable for different voltages & frequencies can be provided.
DC disc brake is a standard feature. If required different brakes can also be supplied.
9. WHEELS
Closed die forged from medium carbon steels, these wheels are machined on CNC lathes for accurate bore & tread profile. Supported on two large dia ball bearings for better rolling effect.
10. CONTROLS
The operation is through pendent push button station or radio remote control having control voltage of 24 V for maximum safety of operator through flush – type hold on push buttons housed in a IP-55 enclosure. Other control voltage can also be given if required. Individual motors are protected by HRC fuses, solid-state/ thermal overload relays, single phasing & wrong sequence preventers. Limit switches for over hoisting / over lowering are also provided. We can also provide AC drives for obtaining speed control. Soft start & oft stop can also be provided.
11. EQUAL|SING SHEAVE BRACKET
Bracket bent to shape from steel sheets holds C. I. sheaves running in sealed ball bearings. Free rope end
clamp is also mounted on this bracket.
12. TROLLEY
Electric Wire Rope hoist can be supplied for fixed mounting or with hand geared or electric driven trolleys
according to the purchaser’s requirements.
13. CREEP SPEED
Not provided in the standard models but can be equipped if required, at an extra cost. For I/10’h of the main
hoisting speed by means of an additional motor and planetary gearing. AC Drives can also be used for this
feature.
14. ACCESSORIES
- Brakes & limit switches for Cross- Travel movement is not provided in standard hoist upto & including 3t capacity. Beyond 3t both brake & limit switch is provided. Should you however desire to have limit switch and brake in hoists upto 3t these can be provide at an extra cost.
- Electronic dynamic braking is available at extra cost. This gives tremendous life to the hoist brake.
