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Conduit bending systems
Choose the bender by the conduit and attachment system—not by motor power alone. This guide separates hand, cordless/electric and hydraulic workflows and links to model-specific compatibility tools.
Start with the system, not the motor
Conduit type → trade size → bender model → shoe → roller/backformer → bend procedure. A powered bender is only useful when the attachment stack matches the conduit you are actually bending.
Last technical review: August 26, 2026.
| Bender type | Typical strength | What must be matched | Best use case |
|---|---|---|---|
| Hand bender | Portable, inexpensive, fast for branch-size work | Head size, EMT vs rigid/IMC marking, stub reference, bend direction | Service work and common 1/2"–1" branch conduit |
| Cordless / electric branch bender | Repeatability and reduced manual effort | Exact shoe family, supported conduit type and size, springback setting | Repeated branch bends near the installation point |
| Floor electric bender | High production and broader 1/2"–2" capacity | Power-unit generation, shoe group, roller/support package | Commercial/industrial prefabrication and repetitive bends |
| Hydraulic bender | High force and larger/rigid applications | Shoe, follow bar/roller, ram setup and manufacturer bending tables | Heavy conduit and deliberate high-force bending |
Milwaukee model 5150-20 is a portable cordless powered bender for galvanized EMT through 1" and RMC through 3/4". Milwaukee publishes three removable shoe sizes and states that those shoes are exclusive to the 5150-20 system.
The Greenlee 555 ecosystem is built around a floor power unit plus model-specific single-shoe or multi-conduit attachment groups. The 555C, 555CX, 555DX and 555DX-22 do not all use the same EMT support package.
Compare hand and powered approaches specifically for EMT, including Milwaukee hand bender sizes and the larger 555-series powered workflow.
EMT, rigid metallic conduit, IMC and PVC-coated rigid can require different shoe and support geometry. A 1" label alone is not enough to establish a valid setup.
A branch bender optimized for 1/2"–1" EMT is a different purchase from a 1/2"–2" production bender. Buying for only today’s size can create an expensive second-tool problem later.
Power units are frequently sold separately from some shoes, rollers or material-specific groups. The accessory cost and availability are part of the system cost.
Battery power and a tripod can be valuable at the point of installation; a heavier floor bender can be more appropriate in a prefab area where 2" conduit and repeated setups are normal.
Use the manufacturer pages below to confirm conduit type, size and attachment requirements first. Then compare current high-capacity electric bender listings without treating the retailer listing as compatibility evidence.
The power unit name is only the first identifier. Greenlee’s current 555 documentation provides a useful example: the 28008 rigid shoe group and 12586 PVC-coated rigid group are documented across 555C, 555CX, 555DX and 555DX-22 in the single-shoe manual, while the 23803 EMT group is for 555C and the legacy 13934 EMT group is for 555CX, 555DX and 555DX-22. The related roller/support pieces also differ.
Milwaukee’s current 5150-20 system takes the opposite approach: Milwaukee states that the 49-16-0012, 49-16-0034 and 49-16-0001 bending shoes are exclusively compatible with the M18 FUEL Branch Conduit Bender. That makes the tool/shoe relationship simpler, but still not interchangeable with a conventional hand bender head.
If a shoe looks similar but the manufacturer does not document the bender model, conduit type and size, ElectricalTradeTools.com leaves the relationship unknown rather than inferring fit from appearance.
Offset spacing and shrink can be expressed with repeatable field constants, but a layout calculation does not tell you which shoe belongs on a power unit. Use the Conduit Bending Chart & Calculator for common offset constants, then follow the specific bender manual for alignment marks, springback and setup.
For a fast two-bend offset, the dedicated Conduit Offset Calculator calculates center-to-center mark spacing and the published shrink allowance from the selected angle.
For the broader Greenlee ecosystem, see Greenlee Conduit Benders. Large rigid work is covered in Rigid Conduit Benders, while pump-driven systems are compared in Hydraulic Conduit Benders.
Use the Conduit Offset Calculator for two-bend offsets and the 3-Point Saddle Calculator for the standard 45° centered saddle method.
A hand bender uses operator leverage and is normally matched to a specific conduit size. An electric or powered bender uses a motor or hydraulic power and usually supports a larger production workflow, but still requires the correct shoe, roller or backformer for the conduit type and size.
Some systems can, but the same shoe is not automatically used for every material. The bender power unit, shoe group, roller or support and conduit-size range must be checked in the manufacturer documentation.
Only when the manufacturer explicitly documents that relationship. Greenlee, for example, publishes model-specific 555-series shoe-group compatibility, while Milwaukee states that its 5150-20 bending shoes are exclusive to that tool.
Powered bending is most attractive when the job involves repetitive bends, larger conduit, prefabrication or enough production volume that setup consistency and reduced manual effort justify the equipment.
Offset geometry is mathematical, but field tables are rounded and manufacturer procedures can differ. Use the multiplier/shrink values tied to the method or bender instructions you are following.