18 inch

shorty-j-5

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 Thickness Throat


Opening

Hook Hook
Length Length Width w/Latch Thick. Width
J55QN18BTA 1264 60 47.625 19.187 22.750 4.63 6.13 4
J55QN18BTB 1489 60 47.625 21.562 22.750 4.63 6.13 4
J55QN18BTC 1627 60 47.625 23.312 22.750 4.63 6.13 4
J55QN18RTA 1264 60 47.625 19.187 22.750 4.63 6.13 4
J55QN18RTB 1489 60 47.625 21.562 22.750 4.63 6.13 4
J55QN18RTC 1627 60 47.625 23.312 22.750 4.63 6.13 4
J70QN18BTA 1296 58.875 47.625 19.187 22.750 4.36 6.250 4.500
J70QN18BTB 1522 58.875 47.625 21.562 22.750 4.36 6.250 4.500
J70QN18BTC 1660 58.875 47.625 23.312 22.750 4.36 6.250 4.500
J70QN18RTA 1296 58.875 47.625 19.187 22.750 4.36 6.250 4.500
J70QN18RTB 1522 58.875 47.625 21.562 22.750 4.36 6.250 4.500
J70QN18RTC 1660 58.875 47.625 23.312 22.750 4.36 6.250 4.500
J80QN18BTA 1425 63 51 20.062 22.750 4.750 6.75 4.750
J80QN18BTB 1650 63 51 22.312 22.750 4.750 6.75 4.750
J80QN18BTC 1815 63 51 24.062 22.750 4.750 6.75 4.750
J80QN18RTA 1425 63 51 20.062 22.750 4.750 6.75 4.750
J80QN18RTB 1650 63 51 22.312 22.750 4.750 6.75 4.750
J80QN18RTC 1815 63 51 24.062 22.750 4.750 6.75 4.750
J100QN18BTA 1651 64.500 51.625 20.062 22.750 4.77 7.63 5.500
J100QN18BTB 1877 64.500 51.625 22.312 22.750 4.77 7.63 5.500
J100QN18BTC 2015 64.500 51.625 24.062 22.750 4.77 7.63 5.500
J100QN18RTA 1651 64.500 51.625 20.062 22.750 4.77 7.63 5.500
J100QN18RTB 1877 64.500 51.625 22.312 22.750 4.77 7.63 5.500
J100QN18RTC 2015 64.500 51.625 24.062 22.750 4.77 7.63 5.500

*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