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24 inch

Four-Sheave-J-Block

Key to four sheave J-Block Model Numbers

J 15 Q 10 B T A
Shorty “J” Crane Block Safe Working Limit-Tons

Number of Sheaves

Q=4
Quadruple

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
J60Q24BTA 1322 59.625 53.500 14.875 28.750 4.63 6.13 4.00
J60Q24BTB 2026 59.625 53.500 21 28.750 4.63 6.13 4.00
J60Q24BTC 2486 59.625 53.500 27.500 28.750 4.63 6.13 4.00
J60Q24RTA 1322 59.625 53.500 14.875 28.750 4.63 6.13 4.00
J60Q24RTB 2026 59.625 53.500 21 28.750 4.63 6.13 4.00
J60Q24RTC 2486 59.625 53.500 27.500 28.750 4.63 6.13 4.00
J70Q24BTA 1374 59.875 53.625 14.875 28.750 4.36 6.25 4.50
J70Q24BTB 2078 59.875 53.625 21 28.750 4.36 6.25 4.50
J70Q24BTC 2538 59.875 53.625 27.500 28.750 4.36 6.25 4.50
J70Q24RTA 1374 59.875 53.625 14.875 28.750 4.36 6.25 4.50
J70Q24RTB 2078 59.875 53.625 21 28.750 4.36 6.25 4.50
J70Q24RTC 2538 59.875 53.625 27.500 28.750 4.36 6.25 4.50
J75Q24BTA 1489 64 57 15 28.750 4.75

6.75

 4.75
J75Q24BTB 2192 64 57 21 28.750 4.75 6.75 4.75
J75Q24BTC 2652 64 57 27.500 28.750 4.75 6.75 4.75
J75Q24RTA 1489 64 57 15 28.750 4.75 6.75 4.75
J75Q24RTB 2192 64 57 21 28.750 4.75 6.75 4.75
J75Q24RTC 2652 64 57 27.500 28.750 4.75 6.75 4.75
J80Q24BTA 1489 64 57 15 28.750 4.75 6.75 4.75
J80Q24BTB 2192 64 57 21 28.750 4.75 6.75 4.75
J80Q24BTC 2652 64 57 27.500 28.750 4.75 6.75 4.75
J80Q24RTA 1489 64 57 15 28.750 4.75 6.75 4.75
J80Q24RTB 2192 64 57 21 28.750 4.75 6.75 4.75
J80Q24RTC 2652 64 57 27.500 28.750 4.75 6.75 4.75
J90Q24BTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J90Q24BTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J90Q24BTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J90Q24RTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J90Q24RTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J90Q24RTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J100Q24BTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J100Q24BTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J100Q24BTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J100Q24RTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J100Q24RTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J100Q24RTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J110Q24BTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J110Q24BTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J110Q24BTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J110Q24RTA 1779 65.125 57.500 15.500 28.750 4.77 7.63 5.50
J110Q24RTB 2486 65.125 57.500 21.500 28.750 4.77 7.63 5.50
J110Q24RTC 2946 65.125 57.500 28 28.750 4.77 7.63 5.50
J115Q24BTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J115Q24BTB 3239 72 62.875 24.125 28.750 5.60 9.13 6.00
J115Q24BTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J115Q24RTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J115Q24RTB 3239 72 62.875 24.125 28.750 5.60 9.13 6.00
J115Q24RTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J125Q24BTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J125Q24BTB 3239 72 62.875 24.125 28.750 5.60 9.13 6.00
J125Q24BTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J125Q24RTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J125Q24RTB 3239 72 62.875 24.125 28.750 5.60 9.13 6.00
J125Q24RTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J135Q24BTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J135Q24BTB 3239 72 62.875 24.125 28.750 5.60 9.13 6.00
J135Q24BTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J135Q24RTA 2533 72 62.875 18.125 28.750 5.60 9.13 6.00
J135Q24RTB 3239 72 62.875 24.125 28.750 5.60 9.13

6.00
J135Q24RTC 3699 72 62.875 24.125 28.750 5.60 9.13 6.00
J150Q24BTA 2838 74.750 65 18.125 28.750 5.34 9.93 7.00
J150Q24BTB 3544 74.750 65 24.125 28.750 5.34 9.93 7.00
J150Q24BTC 4004 74.750 65 30.625 28.750 5.34 9.93 7.00
J150Q24RTA 2838 74.750 65 18.125 28.750 5.34 9.93 7.00
J150Q24RTB 3544 74.750 65 24.125 28.750 5.34 9.93 7.00
J150Q24RTC 4004 74.750 65 30.625 28.750 5.34 9.93 7.00
J165Q24BTA 2838 74.750 65 18.125 28.750 5.34 9.93 7.00
J165Q24BTB 3544 74.750 65 24.125 28.750 5.34 9.93 7.00
J165Q24BTC 4004 74.750 65 30.625 28.750 5.34 9.93 7.00
J165Q24RTA 2838 74.750 65 18.125 28.750 5.34 9.93 7.00
J165Q24RTB 3544 74.750 65 24.125 28.750 5.34 9.93 7.00
J165Q24RTC 4004 74.750 65 30.625 28.750 5.34 9.93 7.00


Dead End Chart

Wire Rope Size T U For Pin Size
7/16″ thru 5/8″ 1 1.28 1-1/4
3/4″ thru 1″ 1.25 1.65 1-5/8
1-1/8″ thru 1-3/8″ 1.75 2.51 2-1/2

*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

HEAVY DUTY HOOK LATCHES ARE STANDARD EQUIPMENT
Johnson’s new heavy duty J-Latches are standard equipment for blocks up to 165 tons.
Larger blocks are equipped with standard bar latches.

When Ordering Please Specify:
·Model Number ·Wire Rope Size ·Options Required