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.

Crosby-catalogue-page-number-342-349.pdf

Product Warnings

(approx. 0.5Mb)
crosby-catalogue-page-355.pdf

Crosby catalogue page 355

(approx. 0.1Mb)
Model
Part N° Block Size (in.) Fitting Guide Price Quantity
2542-T1534
755105
4 S Quote Required
2542-T1535
755123
6 S Quote Required
2542-T1536
757103
4 N Quote Required
2542-T1537
757121
6 N Quote Required
Add to Quote Basket   ?  
  • 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.

Crosby-catalogue-page-number-342-349.pdf

Product Warnings

(approx. 0.5Mb)
crosby-catalogue-page-355.pdf

Crosby catalogue page 355

(approx. 0.1Mb)
Model
Part N° Block Size (in.) Fitting Guide Price Quantity
2542-T1534
755105
4 S Quote Required
2542-T1535
755123
6 S Quote Required
2542-T1536
757103
4 N Quote Required
2542-T1537
757121
6 N Quote Required
Add to Quote Basket   ?  

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