24 inch

Seven-Sheave-J-Block

Key to seven sheave J-Block Model Numbers

J 250 SV 24 B T A
Shorty “J” Crane Block Safe Working Limit-Tons

Number of Sheaves

SV = 7
Seven

Sheave Size – Nom. O.D.

Sheave Bearing:

B = Bronze Bushed
R= Roller Bearing

Hook-Thrust Bearing

Cheek Weights:
A = No 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
J-250SV24BTA 5575 95.375 76.250 30.781 28.750 8.52 12.81 8
J-250SV24BTB 6279 95.375 76.250 36.750 28.750 8.52 12.81 8
J-250SV24BTC 6742 95.375 76.250 43.250 28.750 8.52 12.81 8
J-250SV24RTA 5575 95.375 76.250 30.781 28.750 8.52 12.81 8
J-250SV24RTB 6279 95.375 76.250 36.750 28.750 8.52 12.81 8
J-250SV24RTC 6742 95.375 76.250 43.250 28.750 8.52 12.81 8
J-265SV24BTA 5575 95.375 76.250 30.781 28.750 8.52 12.81 8
J-265SV24BTB 6279 95.375 76.250 36.750 28.750 8.52 12.81 8
J-265SV24BTC 6742 95.375 76.250 43.250 28.750 8.52 12.81 8
J-265SV24RTA 5575 95.375 76.250 30.781 28.750 8.52 12.81 8
J-265SV24RTB 6279 95.375 76.250 36.750 28.750 8.52 12.81 8
J-265SV24RTC 6742 95.375 76.250 43.250 28.750 8.52 12.81 8
J-300SV24BTA 6445 95.250 76.750 32.937 28.750 9.13 12.73 9
J-300SV24BTB 7149 95.250 76.750 38.875 28.750 9.13 12.73 9
J-300SV24BTC 7612 95.250 76.750 45.375 28.750 9.13 12.73 9
J-300SV24RTA 6445 95.250 76.750 32.937 28.750 9.13 12.73 9
J-300SV24RTB 7149 95.250 76.750 38.875 28.750 9.13 12.73 9
J-300SV24RTC 7612 95.250 76.750 45.375 28.750 9.13 12.73 9
J-325SV24BTA 6445 95.250 76.750 32.937 28.750 9.13 12.73 9
J-325SV24BTB 7149 95.250 76.750 38.875 28.750 9.13 12.73 9
J-325SV24BTC 7612 95.250 76.750 45.375 28.750 9.13 12.73 9
J-325SV24RTA 6445 95.250 76.750 32.937 28.750 9.13 12.73 9
J-325SV24RTB 7149 95.250 76.750 38.875 28.750 9.13 12.73 9
J-325SV24RTC 7612 95.250 76.750 45.375 28.750 9.13 12.73 9

*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