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- Crosby N411B, N412B & N413B Loose Swivel Pulley Sheave Hooks. Options at 1, 2 or 3 sheave - Range from 900kg to 3630kg

Crosby N411B, N412B & N413B Loose Swivel Pulley Sheave Hooks. Options at 1, 2 or 3 sheave - Range from 900kg to 3630kg
Western Blocks For Synthetic Fiber Rope with Loose Swivel Hooks.
Model:
Western N-41*-B / LSH-2542


- These blocks are built to carry the increased loads of synthetic fiber ropes.
- All hooks are heat-treated alloy steel.
- You can now use a smaller size rope, and in turn, a smaller block, providing capacities which were previously not possible.
- Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, these blocks meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26.
- N-411B Single Sheave.
- N-412B Double Sheave.
- N-413B Triple Sheave.
Specifications
Block Size (in.) |
Fitting | 411 B* Stock No. | 412 B* Stock No. | 413 B* Stock No. |
4 | S | 755105 | 755301 | 755506 |
6 | S | 755123 | 755329 | 755524 |
4 | N | 757103 | 757309 | 757504 |
6 | N | 757121 | 757327 | 757522 |
*Bearing Code: B- Self Lubricating Bronze Bushed. Fitting Type: S- Round Pin Anchor; N- Swivel Hook Latch
Imperial Specifications
Block Size (in.) | Fitting | Sheave Size (in.) | Synthetic Rope Size (in.) | Working Load Limit (lbs.)* | Weight Each (lbs.) | ||||||
Outside Diameter | Rim Thickness |
Center Pin Dia. | Single | Double | Triple | Single | Double | Triple | |||
4 | S | 2.25 | .62 | .38 | 1/2 | 2000 | 3000 | 3000 | 3.00 | 4.00 | 6.00 |
6 | S | 3.50 | 1.00 | .50 | 3/4 | 3000 | 7000 | 8000 | 6.25 | 10.00 | 14.00 |
4 | N | 2.25 | .62 | .38 | 1/2 | 2000 | 3000 | 3000 | 3.00 | 4.00 | 6.00 |
6 | N | 3.50 | 1.00 | .50 | 3/4 | 3000 | 4000 | 6000 | 6.25 | 10.00 | 14.00 |
*Ultimate Load is 4 times the Working Load Limit
Metric Specifications
Block Size (in.) | Fitting | Sheave Size (mm) | Synthetic Rope Size (mm) | Working Load Limit (t)* | Weight Each (kg.) | |||||||
Outside Diameter | Rim Thickness | Center Pin Dia. | ||||||||||
Single | Double | Triple | Single | Double | Triple | |||||||
4 | S | 57.2 | 15.8 | 9.65 | 13 | .90 | 1.36 | 1.36 | 1.36 | 1.81 | 2.72 | |
6 | S | 89.0 | 25.4 | 12.7 | 19 | 1.36 | 3.18 | 3.63 | 2.83 | 4.54 | 6.35 | |
4 | N | 57.2 | 15.8 | 9.65 | 13 | .91 | 1.36 | 1.36 | 1.36 | 1.81 | 2.72 | |
6 | N | 89.0 | 25.4 | 12.7 | 19 | 1.36 | 1.81 | 2.72 | 2.83 | 4.54 | 6.35 |
*Ultimate Load is 4 times the Working Load Limit.
- These blocks are built to carry the increased loads of synthetic fiber ropes.
- All hooks are heat-treated alloy steel.
- You can now use a smaller size rope, and in turn, a smaller block, providing capacities which were previously not possible.
- Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, these blocks meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26.
- N-411B Single Sheave.
- N-412B Double Sheave.
- N-413B Triple Sheave.
Specifications
Block Size (in.) |
Fitting | 411 B* Stock No. | 412 B* Stock No. | 413 B* Stock No. |
4 | S | 755105 | 755301 | 755506 |
6 | S | 755123 | 755329 | 755524 |
4 | N | 757103 | 757309 | 757504 |
6 | N | 757121 | 757327 | 757522 |
*Bearing Code: B- Self Lubricating Bronze Bushed. Fitting Type: S- Round Pin Anchor; N- Swivel Hook Latch
Imperial Specifications
Block Size (in.) | Fitting | Sheave Size (in.) | Synthetic Rope Size (in.) | Working Load Limit (lbs.)* | Weight Each (lbs.) | ||||||
Outside Diameter | Rim Thickness |
Center Pin Dia. | Single | Double | Triple | Single | Double | Triple | |||
4 | S | 2.25 | .62 | .38 | 1/2 | 2000 | 3000 | 3000 | 3.00 | 4.00 | 6.00 |
6 | S | 3.50 | 1.00 | .50 | 3/4 | 3000 | 7000 | 8000 | 6.25 | 10.00 | 14.00 |
4 | N | 2.25 | .62 | .38 | 1/2 | 2000 | 3000 | 3000 | 3.00 | 4.00 | 6.00 |
6 | N | 3.50 | 1.00 | .50 | 3/4 | 3000 | 4000 | 6000 | 6.25 | 10.00 | 14.00 |
*Ultimate Load is 4 times the Working Load Limit
Metric Specifications
Block Size (in.) | Fitting | Sheave Size (mm) | Synthetic Rope Size (mm) | Working Load Limit (t)* | Weight Each (kg.) | |||||||
Outside Diameter | Rim Thickness | Center Pin Dia. | ||||||||||
Single | Double | Triple | Single | Double | Triple | |||||||
4 | S | 57.2 | 15.8 | 9.65 | 13 | .90 | 1.36 | 1.36 | 1.36 | 1.81 | 2.72 | |
6 | S | 89.0 | 25.4 | 12.7 | 19 | 1.36 | 3.18 | 3.63 | 2.83 | 4.54 | 6.35 | |
4 | N | 57.2 | 15.8 | 9.65 | 13 | .91 | 1.36 | 1.36 | 1.36 | 1.81 | 2.72 | |
6 | N | 89.0 | 25.4 | 12.7 | 19 | 1.36 | 1.81 | 2.72 | 2.83 | 4.54 | 6.35 |
*Ultimate Load is 4 times the Working Load Limit.
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You can easily add more than one item to the Quote Request. This is highly recommend as we will be able to suit your needs much more efficiently.
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