We don't send anything by standard post, all of our deliveries are by trusted couriers which are fully traceable to ensure your orders arrive safe and on time.
Delivery Prices & Transit Times
Delivery costs can be found at checkout.
EXPRESS DELIVERY - Next Working Day Courier, delivered between 08:30-17:00
Scottish Delivery: 1-2 Day Courier (after dispatch)
UK Before 10:30AM: (please call first to check availability)
UK Express Saturday Delivery: (please call first to check availability)
Click & Collect: Free!
Channel Islands: 1-3 Day Courier (Jersey, Guernsey and Isle of Man)
Western Europe: (Netherlands, France, Belgium, Spain, Portugal)
Eastern Europe: Find out in checkout
Rest of the world: Find out in checkout
DELIVERY CUT-OFF
- For all orders placed by 2pm we will endeavour to dispatch same day for delivery the following day.
- All orders after 2pm will dispatch the following working day.
- For urgent shipments and 'last minute' requirements, please call our Sales Team - it's always worth asking if we can still get it out the door today!
Please be aware that some of our products have a lead time, and therefore the quoted transit times above are only applicable after the goods have been dispatched. We always make it clear in the description if our products have a lead time.
We regret that we cannot provide time slots for deliveries unless you have selected pre 10:30AM delivery, all standard express deliveries are delivered between 08:30-17:00 the next working day from dispatch.
Collection of most goods can be made from our warehouse upon request. Did you know that we have a range of slings, shackles and hoists available for instant Click & Collect? While nearly all items on our website can be collected next working day! Call our sales team now on 01384567430
Complete Your Order
Yoke Super Snatch Blocks with Shackle are mega strong and capable of 20.0 tonnes Working Load Limit. Choose between 8-12 Inch Sheave diameter (203-305mm) that suits a wire rope size of 25-29mm. These are seriously heavy-duty and ideal for oilfields and offshore applications.
DIMENSIONAL SPECIFICATIONS
| Part Code |
WLL |
Sheave Dia. |
Wire Rope |
a mm |
b mm |
e mm |
f mm |
g mm |
k mm |
l mm |
r mm |
Mass |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
8-501-02 |
2.0 |
76 |
8-10 | 35 | 30 | 64 | 11 | 75 | 150 | 228 | 217 | 3.8 |
|
8-501-04 |
4.0 |
114 |
10-13 | 64 | 50 | 79 | 19 | 107 | 243 | 356 |
336 |
6.2 |
|
8-501-08 |
8.0 |
152 |
16-19 | 87 | 76 | 104 | 32 | 152 | 320 | 484 | 452 |
13.2 |
|
8-501-0808 |
8.0 |
203 |
16-19 | 87 | 76 | 104 | 32 | 220 | 333 | 558 | 526 |
18.2 |
|
8-541-12 |
12.0 |
152 |
19-22 | 78 | 80 | 134 | 44 | 167 | 359 | 540 | 496 |
24.8 |
|
8-541-15 |
15.0 |
203 |
19-22 | 78 | 80 | 134 | 44 | 220 | 355 | 589 | 545 |
29.6 |
|
8-541-1510 |
15.0 |
254 |
19-22 | 78 | 80 | 134 | 44 | 280 | 423 | 714 | 670 |
42.7 |
|
8-501-1512 |
15.0 |
305 |
19-22 | 78 | 80 | 134 | 44 | 330 | 428 | 770 | 726 |
52.8 |
|
8-551-20 |
20.0 |
203 |
25-29 | 109 | 93 | 150 | 55 | 216 | 433 | 671 | 616 |
41.6 |
|
8-551-2010 |
20.0 |
254 |
25-29 | 109 | 93 | 150 | 55 | 280 | 481 | 778 | 723 |
52.4 |
|
8-551-2012-29 |
20.0 |
305 |
25-29 | 109 | 93 | 150 | 55 | 330 | 485 | 883 | 778 |
62.8 |
| Part Code |
WLL |
Sheave Dia. |
Wire Rope |
a inch |
b inch |
e inch |
f inch |
g inch |
k inch |
l inch |
r inch |
Mass |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
8-501-02 |
2 | 3 | 5/16 - 3/8 | 1.38 | 1.18 | 2.52 | 0.43 | 2.95 | 5.91 | 8.96 | 8.53 | 4.4 |
|
8-501-04 |
4 | 4-1/2 | 3/8 - 1/2 | 2.52 | 1.97 | 3.11 | 0.75 | 4.21 | 9.57 | 14.02 | 13.27 | 13.0 |
|
8-501-08 |
8 | 6 | 5/8 - 3/4 | 3.43 | 2.99 | 4.09 | 1.26 | 5.98 | 12.60 | 19.06 | 17.80 | 28.7 |
|
8-501-0808 |
8 | 8 | 5/8 - 3/4 | 3.43 | 2.99 | 4.09 | 1.26 | 8.66 | 13.10 | 21.90 | 20.64 | 43.0 |
|
8-541-12 |
12 | 6 | 3/4 - 7/8 | 3.07 | 3.15 | 5.28 | 1.73 | 6.57 | 14.13 | 21.26 | 19.63 | 53.6 |
|
8-541-15 |
15 | 8 | 3/4 - 7/8 | 3.07 | 3.15 | 5.28 | 1.73 | 8.66 | 13.99 | 23.19 | 21.46 | 65.1 |
|
8-541-1510 |
15 | 10 | 3/4 - 7/8 | 3.07 | 3.15 | 5.28 | 1.73 | 11.00 | 16.70 | 28.10 | 26.37 | 94.8 |
|
8-501-1512 |
15 | 12 | 3/4 - 7/8 | 3.07 | 3.15 | 5.28 | 1.73 | 13.00 | 16.80 | 30.30 | 28.57 | 117.9 |
|
8-551-20 |
20 | 8 | 1 - 1-1/8 | 4.29 | 3.66 | 5.91 | 2.17 | 8.50 | 17.05 | 26.42 | 24.25 | 90.8 |
|
8-551-2010 |
20 | 10 | 1 - 1-1/8 | 4.29 | 3.66 | 5.91 | 2.17 | 11.00 | 18.90 | 30.60 | 28.46 | 119.0 |
|
8-551-2012-29 |
20 | 12 | 1 - 1-1/8 | 4.29 | 3.66 | 5.91 | 2.17 | 13.00 | 19.10 | 32.80 | 30.63 | 137.8 |
LOADS ON BLOCKS
Angle Factor Mutipliers
The Working Load Limit (WLL) for Yoke Group blocks indicates the maximum load that should be exerted on the block and its connecting fitting. This total load value may be different from the weight being lifted or pulled by a hoisting system. It is necessary to determine the total load being imposed on each block in the system to properly determine the rated capacity block to be used. A single sheave block used to change load line direction can be subjected to total loads greatly different from the weight being lifted or pulled. The total load value varies with the angle between the incoming and departing lines to the block. The following chart indicates the factor to be multiplied by the line pull to obtain the total load on the block.
| Angle | Factor | Angle | Factor |
| 0 | 2.00 | 100 | 1.29 |
| 10 | 1.99 | 110 | 1.15 |
| 20 | 1.97 | 120 | 1.00 |
| 30 | 1.93 | 130 | 0.84 |
| 40 | 1.87 | 135 | 0.76 |
| 45 | 1.84 | 140 | 0.68 |
| 50 | 1.81 | 150 | 0.52 |
| 60 | 1.73 | 160 | 0.35 |
| 70 | 1.64 | 170 | 0.17 |
| 80 | 1.53 | 180 | 0.00 |
| 90 | 1.41 | - | - |
SHEAVE SIZE AND WIRE ROPE STRENGTH
| Ratio A |
Strength Efficiency Compared |
Ratio A |
Strength Efficiency Compared |
| 40 | 95 | 8 | 83 |
| 30 | 93 | 6 | 79 |
| 20 | 91 | 4 | 75 |
| 15 | 89 | 2 | 65 |
| 10 | 86 | 1 | 50 |
Ratio A = Sheave Diameter ÷ Rope Diameter
Strength Efficiency
Bending wire rope reduces its strength. To account for the effect of bend radius on wire rope strength when selecting a sheave, use the table above.
| Ratio B |
Relative Fatigue |
Ratio B |
Relative Fatigue |
| 30 | 10.0 | 16 | 2.1 |
| 25 | 6.6 | 14 | 1.5 |
| 20 | 3.8 | 12 | 1.1 |
| 18 | 2.9 | - | - |