18 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-25D18BTA | 460 | 42.375 | 38.625 | 7.750 | 22.750 | 2.80 | 3.00 | 2.38 |
| J-25D18BTB | 686 | 42.375 | 38.625 | 11.062 | 22.750 | 2.80 | 3.00 | 2.38 |
| J-25D18BTC | 824 | 42.375 | 38.625 | 12.187 | 22.750 | 2.80 | 3.00 | 2.38 |
| J-25D18RTA | 460 | 42.375 | 38.625 | 7.750 | 22.750 | 2.80 | 3.00 | 2.38 |
| J-25D18RTB | 686 | 42.375 | 38.625 | 11.062 | 22.750 | 2.80 | 3.00 | 2.38 |
| J-25D18RTC | 824 | 42.375 | 38.625 | 12.187 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18BTA | 474 | 42.875 | 39.125 | 7.750 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18BTB | 700 | 42.875 | 39.125 | 11.062 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18BTC | 838 | 42.875 | 39.125 | 12.187 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18RTA | 474 | 42.875 | 39.125 | 7.750 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18RTB | 700 | 42.875 | 39.125 | 11.062 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-30D18RTC | 838 | 42.875 | 39.125 | 12.187 | 22.750 | 3.28 | 3.50 | 3.00 |
| J-35D18BTA | 530 | 46.625 | 42.375 | 7.750 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-35D18BTB | 756 | 46.625 | 42.375 | 11.062 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-35D18BTC | 894 | 46.625 | 42.375 | 12.187 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-35D18RTA | 530 | 46.625 | 42.375 | 7.750 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-35D18RTB | 756 | 46.625 | 42.375 | 11.062 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-35D18RTC | 894 | 46.625 | 42.375 | 12.187 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18BTA | 677 | 49.125 | 44.875 | 8.625 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18BTB | 900 | 49.125 | 44.875 | 11.937 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18BTC | 1040 | 49.125 | 44.875 | 13.687 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18RTA | 677 | 49.125 | 44.875 | 8.625 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18RTB | 900 | 49.125 | 44.875 | 11.937 | 22.750 | 3.27 | 4.25 | 3.38 |
| J-40D18RTC | 1040 | 49.125 | 44.875 | 13.687 | 22.750 | 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
Before use, please review our 