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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.)
Block Size (in.)	Fitting	Outside Diameter	Rim Thickness	Center Pin Dia.	Synthetic Rope Size (in.)	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.		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

(approx. 0.1Mb)

Model

Part N°	Block Size (in.)	Fitting	Guide Price
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
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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.