16 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
J30QN16BTA 598 44.250 36.250 13.500 20.125 3.28 3.50 3.00
J30QN16BTB 753 44.250 36.250 16.937 20.125 3.28 3.50 3.00
J30QN16BTC 900 44.250 36.250 19.437 20.125 3.28 3.50 3.00
J30QN16RTA 598 44.250 36.250 13.500 20.125 3.28 3.50 3.00
J30QN16RTB 753 44.250 36.250 16.937 20.125 3.28 3.50 3.00
J30QN16RTC 900 44.250 36.250 19.437 20.125 3.28 3.50 3.00
J35QN16BTA 655 48 39.500 13.500 20.125 3.27 4.25 3.38
J35QN16BTB 810 48 39.500 16.937 20.125 3.27 4.25 3.38
J35QN16BTC 956 48 39.500 19.437 20.125 3.27 4.25 3.38
J35QN16RTA 655 48 39.500 13.500 20.125 3.27 4.25 3.38
J35QN16RTB 810 48 39.500 16.937 20.125 3.27 4.25 3.38
J35QN16RTC 956 48 39.500 19.437 20.125 3.27 4.25 3.38
J40QN16BTA 666 48.750 40.250 13.500 20.125 3.27 4.25 3.38
J40QN16BTB 821 48.750 40.250 16.937 20.125 3.27 4.25 3.38
J40QN16BTC 967 48.750 40.250 19.437 20.125 3.27 4.25 3.38
J40QN16RTA 666 48.750 40.250 13.500 20.125 3.27 4.25 3.38
J40QN16RTB 821 48.750 40.250 16.937 20.125 3.27 4.25 3.38
J40QN16RTC 967 48.750 40.250 19.437 20.125 3.27 4.25 3.38
J45QN16BTA 666 48.750 40.250 13.500 20.125 3.27 4.25 3.38
J45QN16BTB 821 48.750 40.250 16.937 20.125 3.27 4.25 3.38
J45QN16BTC 967 48.750 40.250 19.437 20.125 3.27 4.25 3.38
J45QN16RTA 666 48.750 40.250 13.500 20.125 3.27 4.25 3.38
J45QN16RTB 821 48.750 40.250 16.937 20.125 3.27 4.25 3.38
J45QN16RTC 967 48.750 40.250 19.437 20.125 3.27 4.25 3.38
J50QN16BTA 843 53.875 43.625 15.125 20.125 4.63 6.13 4.00
J50QN16BTB 998 53.875 43.625 17.562 20.125 4.63 6.13 4.00
J50QN16BTC 1144 53.875 43.625 19.937 20.125 4.63 6.13 4.00
J50QN16RTA 843 53.875 43.625 15.125 20.125 4.63 6.13 4.00
J50QN16RTB 998 53.875 43.625 17.562 20.125 4.63 6.13 4.00
J50QN16RTC 1144 53.875 43.625 19.937 20.125 4.63 6.13 4.00
J55QN16BTA 843 53.875 43.625 15.125 20.125 4.63 6.13 4.00
J55QN16BTB 998 53.875 43.625 17.562 20.125 4.63 6.13 4.00
J55QN16BTC 1144 53.875 43.625 19.937 20.125 4.63 6.13 4.00
J55QN16RTA 843 53.875 43.625 15.125 20.125 4.63 6.13 4.00
J55QN16RTB 998 53.875 43.625 17.562 20.125 4.63 6.13 4.00
J55QN16RTC 1144 53.875 43.625 19.937 20.125 4.63 6.13 4.00
J70QN16BTA 888 55.250 43.375 19.187 20.125 4.36 6.25 4.50
J70QN16BTB 1044 55.250 43.375 21.937 20.125 4.36 6.25 4.50
J70QN16BTC 1190 55.250 43.375 26.937 20.125 4.36 6.25 4.50
J70QN16RTA 888 55.250 43.375 19.187 20.125 4.36 6.25 4.50
J70QN16RTB 1044 55.250 43.375 21.937 20.125 4.36 6.25 4.50
J70QN16RTC 1190 55.250 43.375 26.937 20.125 4.36 6.25 4.50
J75QN16BTA 1225 62 49.625 20.062 20.125 4.75 6.75 4.75
J75QN16BTB 1379 62 49.625 22.437 20.125 4.75 6.75 4.75
J75QN16BTC 1526 62 49.625 24.937 20.125 4.75 6.75 4.75
J75QN16RTA 1225 62 49.625 20.062 20.125 4.75 6.75 4.75
J75QN16RTB 1379 62 49.625 22.437 20.125 4.75 6.75 4.75
J75QN16RTC 1526 62 49.625 24.937 20.125 4.75 6.75 4.75
J80QN16BTA 1225 62 49.625 20.062 20.125 4.75 6.75 4.75
J80QN16BTB 1379 62 49.625 22.437 20.125 4.75 6.75 4.75
J80QN16BTC 1526 62 49.625 24.937 20.125 4.75 6.75 4.75
J80QN16RTA 1225 62 49.625 20.062 20.125 4.75 6.75 4.75
J80QN16RTB 1379 62 49.625 22.437 20.125 4.75 6.75 4.75
J80QN16RTC 1526 62 49.625 24.937 20.125 4.75 6.75 4.75

*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