14 inch

Triple-Sheave-J-Block

Key to three sheave J-Block Model Numbers

J 10 T 10 B T A
Shorty “J” Crane Block Safe Working Limit-Tons

Number of Sheaves

T=3
Triple

Sheave Size – Nom. O.D.

Sheave Bearing:

B = Bronze Bushed
R= Roller Bearing

Hook-Thrust Bearing

Cheek Weights:
A = No wts.
AB = Med. wts.
B = Std. wts.
C = X-Heavy wts.


MODEL WT A B E F H J K
Overall Net Thick- Throat Opening Hook Hook
Length Length ness Width w/ Latch Thick. Width
J20T14BTA 320 32 29 8.875 18 2.80 3.00 2.38
J20T14BTAB 430 32 29 10.375 18 2.80 3.00 2.38
J20T14BTB 505 32 29 13.375 18 2.80 3.00 2.38
J20T14BTC 670 32 29 17.625 18 2.80 3.00 2.38
J20T14RTA 320 32 29 8.875 18 2.80 3.00 2.38
J20T14RTAB 430 32 29 10.375 18 2.80 3.00 2.38
J20T14RTB 505 32 29 13.375 18 2.80 3.00 2.38
J20T14RTC 670 32 29 17.625 18 2.80 3.00 2.38
J25T14BTA 320 32 29 8.875 18 2.80 3.00 2.38
J25T14BTAB 430 32 29 10.375 18 2.80 3.00 2.38
J25T14BTB 505 32 29 13.375 18 2.80 3.00 2.38
J25T14BTC 670 32 29 17.625 18 2.80 3.00 2.38
J25T14RTA 320 32 29 8.875 18 2.80 3.00 2.38
J25T14RTAB 430 32 29 10.375 18 2.80 3.00 2.38
J25T14RTB 505 32 29 13.375 18 2.80 3.00 2.38
J25T14RTC 670 32 29 17.625 18 2.80 3.00 2.38
J30T14BTA 370 37.75 34 8.875 18 3.28 3.50 3.00
J30T14BTAB 480 37.75 34 10.375 18 3.28 3.50 3.00
J30T14BTB 555 37.75 34 13.375 18 3.28 3.50 3.00
J30T14BTC 720 37.75 34 17.625 18 3.28 3.50 3.00
J30T14RTA 370 37.75 34 8.875 18 3.28 3.50 3.00
J30T14RTAB 480 37.75 34 10.375 18 3.28 3.50 3.00
J30T14RTB 555 37.75 34 13.375 18 3.28 3.50 3.00
J30T14RTC 720 37.75 34 17.625 18 3.28 3.50 3.00
J35T14BTA 430 41.50 37.25 8.875 18 3.27 4.25 3.38
J35T14BTAB 540 41.50 37.25 10.375 18 3.27 4.25 3.38
J35T14BTB 610 41.50 37.25 13.375 18 3.27 4.25 3.38
J35T14BTC 775 41.50 37.25 17.625 18 3.27 4.25 3.38
J35T14RTA 430 41.50 37.25 8.875 18 3.27 4.25 3.38
J35T14RTAB 540 41.50 37.25 10.375 18 3.27 4.25 3.38
J35T14RTB 610 41.50 37.25 13.375 18 3.27 4.25 3.38
J35T14RTC 775 41.50 37.25 17.625 18 3.27 4.25 3.38


Dead End Chart

Wire Rope Size T U For Pin Size
7/16" thru 5/8" 1 1.28 1-1/4
3/4" thru 1" 1.25 1.65 1-5/8
1-1/8" thru 1-3/8" 1.75 2.51 2-1/2

*Gunnebo Johnson Design Factor is 4 to 1, with some exceptions;

45 Ton models 3.6 to 1

60 Ton models 3.7 to 1

325 Ton models 3.7 to 1