Gardner Bender Sidewinder (Mechanical, Chicago-style): radius, deduct and gain
The Gardner Bender Sidewinder (Mechanical, Chicago-style) is a mechanical bender for EMT, rigid (RMC), and IMC, 1/2" to 2". These are the numbers BendMate uses for each of its shoes.
Part numbers: BWF888 frame; shoes BT57510, BT12515, BT2000 (EMT), BR57510, BR12515 (rigid & IMC); sets BW11, BW12, BW15, BW20, BW27, BW30, BW201, BW221
Specs by shoe
| Size | Centerline radius | Deduct | Gain | Notes |
|---|---|---|---|---|
| 1/2" EMT | 3 5/16" | 5 5/8" | 2 1/8" | Gain worked out from the radius. BT57510 shoe. |
| 3/4" EMT | 5 1/16" | 7 1/2" | 3 1/8" | Gain worked out from the radius. BT57510 shoe. |
| 1" EMT | 6 7/16" | 9 3/4" | 3 15/16" | Gain worked out from the radius. BT57510 shoe. |
| 1-1/4" EMT | 9 15/16" | 13 1/4" | 5 3/4" | Gain worked out from the radius. BT12515 shoe. |
| 1-1/2" EMT | 11 3/8" | 15 3/4" | 6 5/8" | Gain worked out from the radius. BT12515 shoe. |
| 2" EMT | 9 7/16" | 12 3/4" | 6 1/4" | Gain worked out from the radius. BT2000 shoe, used with its follow bar, strap and steel roller. |
| 1/2" RMC | 3 1/4" | 5 1/4" | 2 1/4" | Gain worked out from the radius. BR57510 shoe. |
| 3/4" RMC | 5" | 8 1/8" | 3 3/16" | Gain worked out from the radius. BR57510 shoe. |
| 1" RMC | 6 3/8" | 9 1/2" | 4 1/16" | Gain worked out from the radius. BR57510 shoe. |
| 1-1/4" RMC | 8 1/16" | 11 3/4" | 5 1/8" | Gain worked out from the radius. BR12515 shoe. |
| 1-1/2" RMC | 9 9/16" | 14 1/4" | 6" | Gain worked out from the radius. BR12515 shoe. |
| 1/2" IMC | 3 1/4" | 5 1/4" | 2 3/16" | Gain worked out from the radius. BR57510 rigid & IMC shoe. GB prints no separate IMC set-back, so the rigid values are used. |
| 3/4" IMC | 5" | 8 1/8" | 3 3/16" | Gain worked out from the radius. BR57510 rigid & IMC shoe. GB prints no separate IMC set-back, so the rigid values are used. |
| 1" IMC | 6 3/8" | 9 1/2" | 4" | Gain worked out from the radius. BR57510 rigid & IMC shoe. GB prints no separate IMC set-back, so the rigid values are used. |
| 1-1/4" IMC | 8 1/16" | 11 3/4" | 5 1/8" | Gain worked out from the radius. BR12515 rigid & IMC shoe. GB prints no separate IMC set-back, so the rigid values are used. |
| 1-1/2" IMC | 9 9/16" | 14 1/4" | 6" | Gain worked out from the radius. BR12515 rigid & IMC shoe. GB prints no separate IMC set-back, so the rigid values are used. |
Marks on the shoe
- 1Front edge of the shoeLine your marks up here. This is the arrow the app’s marks are for.
The angle is read with the pointer on the degree scale.
Where the numbers come from
Bend with the Gardner Bender Sidewinder (Mechanical, Chicago-style) 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" EMT on the Gardner Bender Sidewinder (Mechanical, Chicago-style)?
5 5/8". 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 1/8".
What is the deduct for 3/4" EMT on the Gardner Bender Sidewinder (Mechanical, Chicago-style)?
7 1/2". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 5 1/16" and its back-of-90 gain is 3 1/8".
What is the deduct for 1" EMT on the Gardner Bender Sidewinder (Mechanical, Chicago-style)?
9 3/4". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 6 7/16" and its back-of-90 gain is 3 15/16".
What is the deduct for 1-1/4" EMT on the Gardner Bender Sidewinder (Mechanical, Chicago-style)?
13 1/4". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 9 15/16" and its back-of-90 gain is 5 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.