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20 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
J55QN20BTA 1438 61.250 49.625 19.187 24.750 4.63 6.13 4
J55QN20BTB 1737 61.250 49.625 21.937 24.750 4.63 6.13 4
J55QN20BTC 2081 61.250 49.625 26.937 24.750 4.63 6.13 4
J55QN20RTA 1438 61.250 49.625 19.187 24.750 4.63 6.13 4
J55QN20RTB 1737 61.250 49.625 21.937 24.750 4.63 6.13 4
J55QN20RTC 2081 61.250 49.625 26.937 24.750 4.63 6.13 4
J60QN20BTA 1438 61.250 49.625 19,187 24.750 4.63 6.13 4
J60QN20BTB 1737 61.250 49.625 21.937 24.750 4.63 6.13 4
J60QN20BTC 2081 61.250 49.625 26.937 24.750 4.63 6.13 4
J60QN20RTA 1438 61.250 49.625 19.187 24.750 4.63 6.13 4
J60QN20RTB 1737 61.250 49.625 21.937 24.750 4.63 6.13 4
J60QN20RTC 2081 61.250 49.625 26.937 24.750 4.63 6.13 4
J65QN20BTA 1471 61.500 49.625 19.187 24.750 4.36 6.250 4.500
J65QN20BTB 1770 61.500 49.625 21.937 24.750 4.36 6.250 4.500
J65QN20BTC 2114 61.500 49.625 26.937 24.750 4.36 6.250 4.500
J65QN20RTA 1471 61.500 49.625 19.187 24.750 4.36 6.250 4.500
J65QN20RTB 1770 61.500 49.625 21.937 24.750 4.36 6.250 4.500
J65QN20RTC 2114 61.500 49.625 26.937 24.750 4.36 6.250 4.500
J70QN20BTA 1471 61.500 49.625 19.187 24.750 4.36 6.250 4.500
J70QN20BTB 1770 61.500 49.625 21.937 24.750 4.36 6.250 4.500
J70QN20BTC 2114 61.500 49.625 26.937 24.750 4.36 6.250 4.500
J70QN20RTA 1471 61.500 49.625 19.187 24.750 4.36 6.250 4.500
J70QN20RTB 1770 61.500 49.625 21.937 24.750 4.36 6.250 4.500
J70QN20RTC 2114 61.500 49.625 26.937 24.750 4.36 6.250 4.500
J75QN20BTA 1485 65.625 53 20.062 24.750 4.750 7 4.750
J75QN20BTB 1785 65.625 53 22.687 24.750 4.750 7 4.750
J75QN20BTC 2129 65.625 53 27.687 24.750 4.750 7 4.750
J75QN20RTA 1485 65.625 53 20.062 24.750 4.750 7 4.750
J75QN20RTB 1785 65.625 53 22.687 24.750 4.750 7 4.750
J75QN20RTC 2129 65.625 53 27.687 24.750 4.750 7 4.750
J80QN20BTA 1485 65.625 53 20.062 24.750 4.750 6.75 4.750
J80QN20BTB 1785 65.625 53 22.687 24.750 4.750 6.75 4.750
J80QN20BTC 2129 65.625 53 27.687 24.750 4.750 6.75 4.750
J80QN20RTA 1485 65.625 53 20.062 24.750 4.750 6.75 4.750
J80QN20RTB 1785 65.625 53 22.687 24.750 4.750 6.75 4.750
J80QN20RTC 2129 65.625 53 27.687 24.750 4.750 6.75 4.750
J90QN20BTA 1828 66.500 53.625 20.062 24.750 4.77 7.63 5.500
J90QN20BTB 2128 66.500 53.625 22.687 24.750 4.77 7.63 5.500
J90QN20BTC 2472 66.500 53.625 27.687 24.750 4.77 7.63 5.500
J90QN20RTA 1828 66.500 53.625 20.062 24.750 4.77 7.63 5.500
J90QN20RTB 2128 66.500 53.625 22.687 24.750 4.77 7.63 5.500
J90QN20RTC 2472 66.500 53.625 27.687 24.750 4.77 7.63 5.500
J100QN20BTA 1828 66.500 53.625 20.062 24.750 4.77 7.63 5.500
J100QN20BTB 2128 66.500 53.625 22.687 24.750 4.77 7.63 5.500
J100QN20BTC 2472 66.500 53.625 27.687 24.750 4.77 7.63 5.500
J100QN20RTA 1828 66.500 53.625 20.062 24.750 4.77 7.63 5.500
J100QN20RTB 2128 66.500 53.625 22.687 24.750 4.77 7.63 5.500
J100QN20RTC 2472 66.500 53.625 27.687 24.750 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