14 inch

Five-Sheave-J-Block

Key to five sheave J-Block Model Numbers

J 25 QN 10 B T A
Shorty “J” Crane Block Safe Working Limit-Tons

Number of Sheaves

QN=5
Quintuple

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- Width Throat Opening Hook Hook
Length Length ness w/ Latch Thick. Width
J-25QN14BTA 475 37.625 30.500 13.500 18 2.80 3.00 2.38
J-25QN14BTB 655 37.625 30.500 17.937 18 2.80 3.00 2.38
J-25QN14BTC 820 37.625 30.500 22.187 18 2.80 3.00 2.38
J-25QN14RTA 475 37.625 30.500 13.500 18 2.80 3.00 2.38
J-25QN14RTB 655 37.625 30.500 17.937 18 2.80 3.00 2.38
J-25QN14RTC 820 37.625 30.500 22.187 18 2.80 3.00 2.38
J-35QN14BTA 560 45.625 37.250 13.500 18 3.27 4.25 3.38
J-35QN14BTB 740 45.625 37.250 17.937 18 3.27 4.25 3.38
J-35QN14BTC 900 45.625 37.250 22.187 18 3.27 4.25 3.38
J-35QN14RTA 560 45.625 37.250 13.500 18 3.27 4.25 3.38
J-35QN14RTB 740 45.625 37.250 17.937 18 3.27 4.25 3.38
J-35QN14RTC 900 45.625 37.250 22.187 18 3.27 4.25 3.38
J-40QN14BTA 570 46.375 38 13.500 18 3.27 4.25 3.38
J-40QN14BTB 750 46.375 38 17.937 18 3.27 4.25 3.38
J-40QN14BTC 915 46.375 38 22.187 18 3.27 4.25 3.38
J-40QN14RTA 570 46.375 38 13.500 18 3.27 4.25 3.38
J-40QN14RTB 750 46.375 38 17.937 18 3.27 4.25 3.38
J-40QN14RTC 915 46.375 38 22.187 18 3.27 4.25 3.38
J-45QN14BTA 570 46.375 38 13.500 18 3.27 4.25 3.38
J-45QN14BTB 750 46.375 38 17.937 18 3.27 4.25 3.38
J-45QN14BTC 915 46.375 38 22.187 18 3.27 4.25 3.38
J-45QN14RTA 570 46.375 38 13.500 18 3.27 4.25 3.38
J-45QN14RTB 750 46.375 38 17.937 18 3.27 4.25 3.38
J-45QN14RTC 915 46.375 38 22.187 18 3.27 4.25 3.38
J-55QN14BTA 745 51.500 41.375 15.125 18 4.63 6.13 4.00
J-55QN14BTB 925 51.500 41.375 18.437 18 4.63 6.13 4.00
J-55QN14BTC 1090 51.500 41.375 22.687 18 4.63 6.13 4.00
J-55QN14RTA 745 51.500 41.375 15.125 18 4.63 6.13 4.00
J-55QN14RTB 925 51.500 41.375 18.437 18 4.63 6.13 4.00
J-55QN14RTC 1090 51.500 41.375 22.687 18 4.63 6.13 4.00

*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