
Century 3/4 HP Pool Pump Motor, 115/230V, C-Face Threaded Shaft, B127
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Quick overview
- Dual voltage Wired for either 115V or 230V, so it drops into most existing installations.
- C-face with threaded shaft Mounts C-face and takes a threaded impeller, matching the pumps it replaces.
- Stainless shaft 303 stainless steel shaft with 7/16" threads resists the corrosion that kills plated shafts.
- Switchless design A permanent split capacitor motor with no start switch to burn out.
- Open dripproof, 50 C ambient Rated for continuous duty at a 50 C ambient on a rigid base.
- Ball bearings both ends Ball bearings at the drive end and the opposite drive end, running counterclockwise from the pump end.
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Frequently bought together

Century 3/4 HP Pool Pump Motor, 115/230V, C-Face Threaded Shaft, B127

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Product details
The Century B127 is a 3/4 HP replacement pool pump motor, dual voltage at 230/115 V, running 3450 rpm on a 1.5 service factor. It is an S56J frame motor with C-face mounting and a threaded shaft, which is the combination used by a large run of older pool pumps.
How it is built
It is a permanent split capacitor motor, switchless, so there is no centrifugal start switch to fail. The enclosure is open dripproof on a rigid base, rated for continuous duty at a 50 C ambient, with ball bearings at both ends and a UL 1081 design. Rotation is counterclockwise viewed from the pump end.
The shaft
The shaft is 303 stainless steel with 7/16" threads, 0.625" in diameter and a 2.57" extension, and the motor measures 12.01" overall. Stainless matters here: a plated shaft in a wet pump seal chamber will pit and then chew up every seal you fit afterwards. Century lists ST1072 as a substitute part number for this motor.
Change the pump shaft seal while the motor is out. It is a few dollars against a job you do not want to do twice.
| Brand | Century |
|---|---|
| Manufacturer part number | B127 |
| UPC | 786674011886 |
| Substitute part number | ST1072 |
| Horsepower | 3/4 HP, 0.56 kW |
| Voltage | 230/115 V |
| Speed | 3450 rpm |
| Service factor | 1.5 |
| Frame | S56J |
| Phase | 1 |
| Frequency | 60 Hz |
| Current | SF 6.0/12.0 A |
| Enclosure | Open dripproof |
| Mounting | C face, rigid base |
| Shaft | 303 stainless steel, 7/16" threads |
| Shaft dimensions | 0.625" diameter, 2.57" extension |
| Overall length | 12.01" |
| Shipping weight | 23 lb |
| Ships | Parcel |
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Questions and answers
What people ask about this product, answered by our pool techs.
Is this motor 115V or 230V?
What frame and shaft does it have?
Is ST1072 the same motor?
Should I replace the shaft seal at the same time?
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