20 inch

shorty-j-6

Key to six sheave J-Block Model Numbers

J 30 SX 14 B T A
Shorty “J” Crane Block Safe Working Limit-Tons

Number of Sheaves

SX = 6
Sextuple

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
J65SX20BTA 1448 61.250 49.375 22.187 24.750 4.36 6.250 4.500
J65SX20BTB 1748 61.250 49.375 24.812 24.750 4.36 6.250 4.500
J65SX20BTC 2090 61.250 49.375 29.812 24.750 4.36 6.250 4.500
J65SX20RTA 1448 61.250 49.375 22.187 24.750 4.36 6.250 4.500
J65SX20RTB 1748 61.250 49.375 24.812 24.750 4.36 6.250 4.500
J65SX20RTC 2090 61.250 49.375 29.812 24.750 4.36 6.250 4.500
J70SX20BTA 1448 61.250 49.375 22.187 24.750 4.36 6.250 4.500
J70SX20BTB 1748 61.250 49.375 24.812 24.750 4.36 6.250 4.500
J70SX20BTC 2090 61.250 49.375 29.812 24.750 4.36 6.250 4.500
J70SX20RTA 1448 61.250 49.375 22.187 24.750 4.36 6.250 4.500
J70SX20RTB 1748 61.250 49.375 24.812 24.750 4.36 6.250 4.500
J70SX20RTC 2090 61.250 49.375 29.812 24.750 4.36 6.250 4.500
J75SX20BTA 1822 65.625 53 22.187 24.750 4.750 7 4.750
J75SX20BTB 2122 65.625 53 24.812 24.750 4.750 7 4.750
J75SX20BTC 2466 65.625 53 29.812 24.750 4.750 7 4.750
J75SX20RTA 1822 65.625 53 22.187 24.750 4.750 7 4.750
J75SX20RTB 2122 65.625 53 24.812 24.750 4.750 7 4.750
J75SX20RTC 2466 65.625 53 29.812 24.750 4.750 7 4.750
J80SX20BTA 1822 65.625 53 22.187 24.750 4.750 6.75 4.750
J80SX20BTB 2122 65.625 53 24.812 24.750 4.750 6.75 4.750
J80SX20BTC 2466 65.625 53 29.812 24.750 4.750 6.75 4.750
J80SX20RTA 1822 65.625 53 22.187 24.750 4.750 6.75 4.750
J80SX20RTB 2122 65.625 53 24.812 24.750 4.750 6.75 4.750
J80SX20RTC 2466 65.625 53 29.812 24.750 4.750 6.75 4.750
J90SX20BTA 2130 66.500 53.500 22.187 24.750 4.77 7.63 5.500
J90SX20BTB 2431 66.500 53.500 24.812 24.750 4.77 7.63 5.500
J90SX20BTC 2775 66.500 53.500 29.812 24.750 4.77 7.63 5.500
J90SX20RTA 2130 66.500 53.500 22.187 24.750 4.77 7.63 5.500
J90SX20RTB 2431 66.500 53.500 24.812 24.750 4.77 7.63 5.500
J90SX20RTC 2775 66.500 53.500 29.812 24.750 4.77 7.63 5.500
J100SX20BTA 2130 66.500 53.500 22.187 24.750 4.77 7.63 5.500
J100SX20BTB 2431 66.500 53.500 24.812 24.750 4.77 7.63 5.500
J100SX20BTC 2775 66.500 53.500 29.812 24.750 4.77 7.63 5.500
J100SX20RTA 2130 66.500 53.500 22.187 24.750 4.77 7.63 5.500
J100SX20RTB 2431 66.500 53.500 24.812 24.750 4.77 7.63 5.500
J100SX20RTC 2775 66.500 53.500 29.812 24.750 4.77 7.63 5.500
J115SX20BTA 2778 73.625 58.875 23.937 24.750 5.60 9.13 6
J115SX20BTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J115SX20BTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J115SX20RTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J115SX20RTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J115SX20RTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J125SX20BTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J125SX20BTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J125SX20BTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J125SX20RTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J125SX20RTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J125SX20RTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J130SX20BTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J130SX20BTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J130SX20BTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J130SX20RTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J130SX20RTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J130SX20RTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J140SX20BTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J140SX20BTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J140SX20BTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J140SX20RTA 2778 73.625 58.875 23.937 24.750 5.600 9.13 6
J140SX20RTB 3078 73.625 58.875 26.437 24.750 5.600 9.13 6
J140SX20RTC 3420 73.625 58.875 31.437 24.750 5.600 9.13 6
J150SX20BTA 2963 76.250 61 23.937 24.750 5.34 9.93 7
J150SX20BTB 3263 76.250 61 26.437 24.750 5.34 9.93 7
J150SX20BTC 3605 76.250 61 31.437 24.750 5.34 9.93 7
J150SX20RTA 2963 76.250 61 23.937 24.750 5.34 9.93 7
J150SX20RTB 3263 76.250 61 26.437 24.750 5.34 9.93 7
J150SX20RTC 3605 76.250 61 31.437 24.750 5.34 9.93 7
J165SX20BTA 2963 76.250 61 23.937 24.750 5.34 9.93 7
J165SX20BTB 3263 76.250 61 26.437 24.750 5.34 9.93 7
J165SX20BTC 3605 76.250 61 31.437 24.750 5.34 9.93 7
J165SX20RTA 2963 76.250 61 23.937 24.750 5.34 9.93 7
J165SX20RTB 3263 76.250 61 26.437 24.750 5.34 9.93 7
J165SX20RTC 3605 76.250 61 31.437 24.750 5.34 9.93 7

*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