Klein Tools iron hand bender: radius, deduct and gain
The Klein Tools iron hand bender is a hand bender for EMT, rigid (RMC), and IMC, 1/2" to 1-1/4". These are the numbers BendMate uses for each of its shoes.
Part numbers: 51603, 51604, 51605 (heads 51608, 51609, 51610), 56211 (earlier 56203, 56204, 56205)
Specs by shoe
| Size | Centerline radius | Deduct | Gain | Notes |
|---|---|---|---|---|
| 1/2" EMT | 4 5/8" | 5" | 2 11/16" | Gain worked out from the radius. 51603 (head 51608); stub height 5 from the 51608 head sheet. Head also has 30° and 60° center-of-bend notches. The older 56203 datasheet lists a 4 in radius. |
| 3/4" EMT | 5 1/2" | 6" | 3 5/16" | Gain worked out from the radius. 51604 (head 51609). Head also has 30° and 60° center-of-bend notches. The older 56204 datasheet lists a 5 in radius. |
| 1/2" RMC | 5 1/2" | 6" | 3 3/16" | Gain worked out from the radius. Bent in the 3/4 EMT head; Klein gives one radius and stub height per head. |
| 1/2" IMC | 5 1/2" | 6" | 3 3/16" | Gain worked out from the radius. Bent in the 3/4 EMT head; Klein gives one radius and stub height per head. |
| 1" EMT | 7 3/8" | 8" | 4 5/16" | Gain worked out from the radius. 51605 (head 51610). Head also has 30° and 60° center-of-bend notches. The older 56205 datasheet lists a 7 in radius. |
| 3/4" RMC | 7 3/8" | 8" | 4 3/16" | Gain worked out from the radius. Bent in the 1 EMT head; Klein gives one radius and stub height per head. |
| 3/4" IMC | 7 3/8" | 8" | 4 3/16" | Gain worked out from the radius. Bent in the 1 EMT head; Klein gives one radius and stub height per head. |
| 1-1/4" EMT | 7 1/4" | 11" | 4 5/8" | Centerline radius: NEC minimum radius; check against your bender Gain worked out from the radius. 56211 head. Klein prints no radius for it; radius is the NEC minimum, so gain and shrink are estimates. Stub height 11 is from Klein's bender guide. Measure your bender. |
| 1" RMC | 7 1/4" | 11" | 4 7/16" | Centerline radius: NEC minimum radius; check against your bender Gain worked out from the radius. 56211 head (1-1/4 EMT groove). Radius is the NEC minimum for the head's 1-1/4 size, not measured. |
| 1" IMC | 7 1/4" | 11" | 4 3/8" | Centerline radius: NEC minimum radius; check against your bender Gain worked out from the radius. 56211 head (1-1/4 EMT groove). Radius is the NEC minimum for the head's 1-1/4 size, not measured. |
Marks on the shoe
- 1ArrowLine your marks up here. This is the arrow the app’s marks are for.Printed as “Alignment Arrow”
- 245° center markThe center of a 45° bend: line up a mark placed on a bend’s center, like a three-point saddle’s middle bend.Printed as “45° Center-of-Bend”
- 3Back of 90 and 60° center markThe back of a 90, and the center of a 60° bend: the two are only about 1/8" apart.Printed as “90° Back-of-Bend & 60° Center-of-Bend”
- 4Angle linesThe conduit lines up with each one as the bend reaches that angle, bending in the air.Printed as “Bend Angle Lines”
- 5Offset multipliersThe offset multiplier for each angle, for working an offset out by hand.Printed as “Bend Angle Multipliers”
The angle is read on the lines and marks on the head.
Where the numbers come from
Bend with the Klein Tools iron hand 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" EMT on the Klein Tools iron hand bender?
5". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 4 5/8" and its back-of-90 gain is 2 11/16".
What is the deduct for 3/4" EMT on the Klein Tools iron hand bender?
6". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 5 1/2" and its back-of-90 gain is 3 5/16".
What is the deduct for 1" EMT on the Klein Tools iron hand bender?
8". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 7 3/8" and its back-of-90 gain is 4 5/16".
What is the deduct for 1-1/4" EMT on the Klein Tools iron hand bender?
11". 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 5/8".
Brand and model names only identify the bender. BendMate isn’t affiliated with or endorsed by Klein Tools. Check the numbers against the markings on your own bender.