Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender): radius, deduct and gain
The Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender) is a hydraulic bender for rigid (RMC), 1/2" to 4". These are the numbers BendMate uses for each of its shoes.
Part numbers: B316S (1/2-2), B340S, B343S Eject-O-Matic (1-1/4-4) and their pump kits; shoes BZ12011-BZ12061, BZ12341, BZ12351, BZ12391, BZ12392
Specs by shoe
| Size | Centerline radius | Deduct | Gain | Notes |
|---|---|---|---|---|
| 1/2" RMC | 3 5/16" | 1 1/8" | 2 1/4" | Gain worked out from the radius. BZ12011 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 3/4" RMC | 4 1/2" | 1 1/2" | 3" | Gain worked out from the radius. BZ12021 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 1" RMC | 5 13/16" | 1 7/8" | 3 13/16" | Gain worked out from the radius. BZ12031 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 1-1/4" RMC | 7 1/4" | 2 3/8" | 4 3/4" | Gain worked out from the radius. BZ12041 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 1-1/2" RMC | 8 1/4" | 2 3/4" | 5 7/16" | Gain worked out from the radius. BZ12051 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 2" RMC | 9 1/2" | 3 1/4" | 6 7/16" | Gain worked out from the radius. BZ12061 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 2-1/2" RMC | 10 1/2" | 3 11/16" | 7 3/8" | Gain worked out from the radius. BZ12341 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 3" RMC | 13" | 4 1/2" | 9 1/16" | Gain worked out from the radius. BZ12351 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
| 3-1/2" RMC | 15" | 5 3/16" | 10 7/16" | Gain worked out from the radius. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. Radius and deduct from GB's one-shot stub chart, which lists this size at radius 15. GB lists the BZ12391 shoe as 17-1/2, which would need a deduct of about 5-3/4; check your shoe and test-bend first. |
| 4" RMC | 20" | 6 1/2" | 13 1/16" | Gain worked out from the radius. BZ12392 shoe. The deduct is to the bending mark aligned with the arrow at the center of the shoe (the middle of the bend), not a hook. |
This bender’s deduct is measured to the middle of the shoe, so BendMate marks the center of every bend for it.
Marks on the shoe
- 1Middle of the shoeLine your marks up here: the bend forms evenly on both sides of it.
The angle is read on the angle gauge on the pivot shoe.
Where the numbers come from
Bend with the Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender) in BendMate
Choose it in the app and every mark comes from these numbers. Edit any of them to match your own bender.
Common questions
What is the deduct for 1/2" RMC on the Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender)?
1 1/8". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 3 5/16" and its back-of-90 gain is 2 1/4".
What is the deduct for 3/4" RMC on the Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender)?
1 1/2". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 4 1/2" and its back-of-90 gain is 3".
What is the deduct for 1" RMC on the Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender)?
1 7/8". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 5 13/16" and its back-of-90 gain is 3 13/16".
What is the deduct for 1-1/4" RMC on the Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender)?
2 3/8". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 7 1/4" and its back-of-90 gain is 4 3/4".
Brand and model names only identify the bender. BendMate isn’t affiliated with or endorsed by Gardner Bender. Check the numbers against the markings on your own bender.