16 inch

Key to two sheave J-Block Model Numbers
J | 5 | D | 10 | B | T | A |
Shorty “J” Crane Block | Safe Working Limit-Tons |
Number of Sheaves Double |
Sheave Size – Nom. O.D. |
Sheave Bearing: B = Bronze Bushed |
Hook-Thrust Bearing |
Cheek Weights: |
Model | WT. | A | B | E | F | H | J | K |
Overall | Net | Thick- | Width | Throat-Opening | Hook | Hook | ||
|
|
Length
|
Length
|
ness
|
|
w/ Latch
|
Thick.
|
Width
|
J-20D16BTA | 328 | 38.250 | 34.500 | 6.625 | 20.125 | 2.80 | 3.00 | 2.38 |
J-20D16BTB | 484 | 38.250 | 34.500 | 10.062 | 20.125 | 2.80 | 3.00 | 2.38 |
J-20D16BTC | 630 | 38.250 | 34.500 | 12.562 | 20.125 | 2.80 | 3.00 | 2.38 |
J-20D16RTA | 328 | 38.250 | 34.500 | 6.625 | 20.125 | 2.80 | 3.00 | 2.38 |
J-20D16RTB | 484 | 38.250 | 34.500 | 10.062 | 20.125 | 2.80 | 3.00 | 2.38 |
J-20D16RTC | 630 | 38.250 | 34.500 | 12.562 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16BTA | 328 | 38.250 | 34.500 | 6.625 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16BTB | 484 | 38.250 | 34.500 | 10.062 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16BTC | 630 | 38.250 | 34.500 | 12.562 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16RTA | 328 | 38.250 | 34.500 | 6.625 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16RTB | 484 | 38.250 | 34.500 | 10.062 | 20.125 | 2.80 | 3.00 | 2.38 |
J-25D16RTC | 630 | 38.250 | 34.500 | 12.562 | 20.125 | 2.80 | 3.00 | 2.38 |
J-30D16BTA | 351 | 40.250 | 36.500 | 6.625 | 20.125 | 3.28 | 3.50 | 3.00 |
J-30D16BTB | 506 | 40.250 | 36.500 | 10.062 | 20.125 | 3.28 | 3.50 | 3.00 |
J-30D16BTC | 652 | 40.250 | 36.500 | 12.562 | 20.125 | 3.28 | 3.50 | 3.00 |
J-30D16RTA | 351 | 40.250 | 36.500 | 6.625 | 20.125 | 3.28 | 3.50 | 3.00 |
J-30D16RTB | 506 | 40.250 | 36.500 | 10.062 | 20.125 | 3.28 | 3.50 | 3.00 |
J-30D16RTC | 652 | 40.250 | 36.500 | 12.562 | 20.125 | 3.28 | 3.50 | 3.00 |
J-35D16BTA | 425 | 45 | 40.750 | 7.750 | 20.125 | 3.27 | 4.25 | 3.38 |
J-35D16BTB | 581 | 45 | 40.750 | 11.187 | 20.125 | 3.27 | 4.25 | 3.38 |
J-35D16BTC | 727 | 45 | 40.750 | 13.687 | 20.125 | 3.27 | 4.25 | 3.38 |
J-35D16RTA | 425 | 45 | 40.750 | 7.750 | 20.125 | 3.27 | 4.25 | 3.38 |
J-35D16RTB | 581 | 45 | 40.750 | 11.187 | 20.125 | 3.27 | 4.25 | 3.38 |
J-35D16RTC | 727 | 45 | 40.750 | 13.687 | 20.125 | 3.27 | 4.25 | 3.38 |
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