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