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R700 Curvature Radius Pithead Cable Roller with 160mm Max Cable Diameter and 10-20KN Rated Load for Manhole Cable Entry
Product Details:
| Place of Origin: | Ningbo, China |
| Brand Name: | Suntech |
| Certification: | ISO9001 |
| Model Number: | SH700J3 |
Payment & Shipping Terms:
| Minimum Order Quantity: | 1 PCS |
|---|---|
| Price: | Negotiable |
| Packaging Details: | Plywood case, one unit per compartment with chute protected by foam wrap |
| Delivery Time: | 3-7 days for stock orders |
| Payment Terms: | L/C,T/T |
| Supply Ability: | 400 PCS per Month |
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Detail Information |
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| Item No.: | 21285-21287 | Series: | SH Pithead Cable Roller |
|---|---|---|---|
| Models: | SH450J, SH700J3, SH700J6 | Rated Load: | 10-20KN |
| Curvature Radius: | R450, R700 | Max Cable Diameter: | 100mm, 160mm |
| Weight Range: | 7.7-23KG | Warranty: | 1 Year |
| Highlight: | R700 Curvature Radius Pithead Cable Roller,160mm Max Cable Diameter Cable Roller Pulley,10-20KN Rated Load Pithead Cable Roller |
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Product Description
Where the Pithead Roller Works
A manhole entry is a three dimensional problem. The cable arrives horizontally, drops through the opening, and then has to follow the pit wall without resting on the rim. The SH series pithead roller is built for that transition: a curved roller path with a defined curvature radius, mounted so the cable is guided down instead of being dragged across concrete or a cast iron rim. Three item numbers cover curvature radii R450 and R700 with three and six block configurations.
Model table as currently specified
| Item No. | Model | Curvature Radius | Max Cable Diameter | Block Number | Deviation Angle | Weight |
|---|---|---|---|---|---|---|
| 21285 | SH450J | R450 | 100mm | 3 | 45 degrees | 7.7KG |
| 21286 | SH700J3 | R700 | 160mm | 3 | 45 degrees | 14KG |
| 21287 | SH700J6 | R700 | 160mm | 6 | 90 degrees | 23KG |
The series is rated 10-20KN. Installation crews should read the rated load figure against the calculated pull tension for the section, and confirm the applicable cable diameter range with the datasheet that accompanies the quotation.
Choosing between R450 and R700
- Curvature radius sets the minimum bending the cable will accept at the entry. A larger radius is the safer choice for stiff or large diameter cable.
- The 45 degree deviation covers a single drop through a pit opening; the 90 degree version handles a drop that then turns along the pit wall.
- Block number follows the same logic: three blocks for a single plane change, six blocks where the path has to be held through a longer curve.
- Cable diameter limits are stated per model in the table. Do not size the roller from the winch or the duct bore.
Planning the pull through a pithead
Set the roller so the first contact point is on the roller path, not on the pit rim. If the cable touches the rim before it reaches the roller, the roller cannot protect the section that matters. Where the pit opening is offset from the duct line, add a lead-in guide rather than angling the roller, since an angled frame concentrates load on one block. During the pull, keep one person at the pithead: the entry is where the cable leaves the guided path first.
Inspection before shipment
- Each block turned by hand and checked for free rotation.
- Frame, axle pins and mounting points inspected; pin holes reamed where a burr is found.
- Weight and curvature radius rechecked against the table row for the ordered model.
- Plywood case packing, 400 PCS per month supply capacity, 1 PCS minimum order.
Notes on the data on this page
The table above is transcribed from the current pithead roller datasheet. Where an earlier catalogue entry and the datasheet differ on weight or cable diameter, the datasheet for the specific item number governs. This page does not quote efficiency percentages, does not claim the roller replaces a proper bend radius calculation, and does not state a certification beyond the ISO entry in the attribute table.
Buyer questions
Which model suits a 160mm cable pit entry?
The two R700 models are listed with a 160mm maximum cable diameter. Choose the 45 degree version for a straight drop and the 90 degree version where the cable turns at the pit wall.
Is the rated load per block or for the assembly?
Treat the 10-20KN figure as the series rating and confirm the figure for your model on the datasheet before the pull is planned.
Can the roller be left in the pit between pulls?
It is a pulling aid. Remove it after the pull, clean the roller path, and store it dry.
What are the order terms?
1 PCS minimum, L/C or T/T, 3-7 days for stock, plywood case with 1 year warranty against manufacturing defects.
