C A B L E R O L L E R S F O R H I R E
Precautions must be taken when working with any equipment overhead that injuries don’t arise from the equipment breaking or coming loose.
When pulling cable over rollers all personnel must stay clear, particularly near turns or angle changes.
Our range has been developed over a long period and their design comes from observation of a lot of jobs.
One of the criteria used in their design is that there shouldn’t be too many designs to pick from. This means the designs have to be as versatile as possible. They are designed to be used with our hydraulic winch. Some of the applications of these designs may not be obvious, but I hope that these instructions will help in that regard. In all cases it should be remembered that the roller set up is only as strong as the supporting structure.
6 Wheel 180 Degree Roller
Designed to pull 180 degrees out of pit where access is limited.
Strong steel welded frame. Polyurethane rollers.
Designed to be either bolted or suspended by chain where access is limited. The roller pin can be removed to release cable from roller frame.
For use with smaller cable reels up to 600mm diameter and 500mm width.
Tray Feed Roller
Designed to lead cable onto and also off cable tray or ladder.
Their name has become less relevant as their applications have grown. They can sit in the bottom of a trench to support the cable off the ground but they can do a whole lot more. They can be used sitting normally, to make minor direction changes in the vertical plane, or they can be laid on their side to make horizontal turns.
They can be further stabilized by putting “reo” bars through the end of their frames. They can be linked to form a chain, by use of stirrups to join the ends of their frames. Linked in this way they can then be used on their side to form a curve.
Obviously they need to be supported by staking, sand bagging or similar suitable structure.
Versatile multipurpose design.
Can be used in trenches, on trays, or linked in chains to form curves.
Strong welded steel frame.
Cast Polyurethane roller.
150mm diameter cable capacity.
Base size 350mm x 200mm
CABLE LADDER WORK
Cable ladder doesn’t normally cause much friction between itself and cable. Trays often take lots of deviations, ups, downs. round bends and even double and triple sets.
Our TRENCH ROLLERS are pretty versatile for these applications. At the top of a rise the roller can be set, not right at the apex of the angle change but just before and or after, to line the cable up with the running surface of the tray. At the bottom of a rise it can be tied close in to the apex of the bend so that the cable passes between the roller and the frame.
When the cable is in (and you can pull a number of cables through until the frame is full) then you can remove the shaft and roller to take the cable out of the frame.
PIT EDGE ROLLERS
Originally designed to take cable over the top edge of a pit, this is a 90 degree 500mm radius roller set.
It can be used to turn 90 degrees or less in lots of applications. It is especially good for bends on cable trays, both horizontal and vertical.
It can be attached to the tray or bolted to concrete or tray above leaving tray free for dressing in cable.
Pitt Edge Rollers
A 900 set similar to he pit edge roller with a 900mm radius.
Frame is in two pieces, joined in the middle by a pin.
Each side can be used separately for small angle changes in trench or on tray.
CABLE TRAY FEEDING ROLLERS
Specifically designed to feed cable onto and off cable tray. Used to lead cable onto or off cable ladder. Can also be used for slight changes in direction on ladder tray. It is designed to be attached to the tray, with it’s end roller hanging over the end of the tray. It can also hang over the side or over the outside flange of a turn.
No matter how the roller frame is fixed to the cable tray, the tray itself must be supported so that it can support the forces of the cable being pulled.
Cable Tray Feeding Roller
180 DEGREE ROLLER
Designed for pulling cable out of vertically finishing conduits in slabs, where there is a concrete slab above, with the winch fixed to the floor. It has a removable bracket at the top, which can be bolted to the ceiling above.
These bolts and the concrete, must be strong enough to withstand more than twice the effort exerted by the winch, and it is likely that there will be more effort exerted on one side of the frame than the other.
In this application the winch rope, not the cable, is fed over the rollers. An open ended cable sock can be used to pull extra cable out of the conduit if needed.
This roller can also be used in a large concrete pit, opposite the end of conduits to turn the tow rope back on itself to come out of the pit, or for a 900 turn (in light duty applications), like at the end of a cable tray turning down a wall.
180 Degree Rollers
180 Degree Pit Rollers
CONDUIT FEED ROLLERS
Inserted into conduit for a smooth cable path into conduit.
Sizes from 63mm to 150mm.
Can also be used in conjunction with a series of rollers dependant on application.
Feeds cable into pipe.
Allows for angle changes in pits.
Conduit size from 80mm to150mm.
Conduit Feed Rollers
This is an extension to the feeding roller. It ads a 900 turn to the exit of a conduit. It is fitted to the feeding roller via a longer shaft, which carries the roller casting, the feeding roller frame and the pit roller frame. The feeding roller is put into the conduit in the normal way and becomes the mounting for the whole assembly. It may need a bolt into the pit to hold it in place. We also have an adapted version of this roller set which has an added bracket. This allows the 900 turn to be bolted down to concrete such as where you have a conduit finishing vertical and flush with a floor. Where you need to head off to a winch.
... a note on pits
It is common to install a pit where an angle change is required in a conduit run (often referred to as a turning pit). This practice makes it easy to lay conduit but it complicates the pulling of cable. From a cable pulling perspective, it is far more productice to put a turn in the conduit, outside the pit and have the mouths of the conduit directly opposite each other in the pit. The turn should be after the pit, in the direction of the pull, so that lubricant can be applied to the cabl just before it goes around the bend.
The cost of extra conduit bends etc, is made up for by an easier cable pull with less equipment and complications.