A.Y. McDonald · Submersible Motor
Baker 10 in Submersible Motor
10 in water well motor, 125 to 250 HP, three-phase, 5 models.
125-250 HP at 60 Hz
460V 3Ph
10 in Flange
16900 lbf Downward Thrust
IP68, Class Y Insulation
85°F Water Temperature Rating
10 in Motor, 56.3-71.7 in L
596-911 lb Weight
What Ships and What It Needs to Run
Included: the motor with its lead; lead length per model is in the Models table.
Pump end required, ordered separately: a Baker pump end of the same horsepower with a 10 in motor bracket.
Motor control: Three-phase motors need a starter kit or drive. Overload protection must be provided by the user.
Drop cable and splice kit: sized to your setting depth and ordered separately.
Overview
Baker’s 10 in asynchronous two-pole submersible motors run from 125 to 250 HP. They are the rewindable type: the copper, PVC-insulated stator sits in an AISI 304 stainless steel outer shell, with painted cast iron supports and a keyed shaft end.
A Kingsbury-type thrust bearing with graphite tilting pads and a ceramic disc carries the load, and a ceramic and carbon mechanical seal closes the motor. Overload protection must be provided by the user. Four-pole versions can be made available; contact us.
Genuine A.Y. McDonald equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier. Watermain Supply is an Authorized Stocking A.Y. McDonald and Baker Water Systems Distributor.
3-Year A.Y. McDonald Motor Warranty
Covered for 3 years from the date of manufacture under A.Y. McDonald’s published terms for Baker submersible motors. The terms add a 5-year term from the date of manufacture for Baker submersible motors, including assembled pumps with pump ends up to 25 GPM, in potable water applications.
Room to Grow
One motor per pump end, matched by horsepower. Need more head or flow later? Pair a larger pump end with the matching larger motor: Baker 10 in motors run from 125 to 250 HP in this listing, all on the same 10 in flange.
Models & Ratings (60 Hz)
| Model |
Part No. |
HP |
Power |
kW |
Service Factor |
Rated Amps |
SF Amps |
Downward Thrust |
Lead |
Length |
Weight |
| SM1033 125HP460V |
3132-723 |
125 |
460V 3Ph |
92 |
1.15 |
149.4 A |
171.8 A |
16900 lbf |
16 ft |
56.3 in |
596 lb |
| SM1033 150HP460V |
3132-724 |
150 |
460V 3Ph |
110 |
1.15 |
180.5 A |
207.6 A |
16900 lbf |
16 ft |
59.5 in |
656 lb |
| SM1033 175HP460V |
3132-725 |
175 |
460V 3Ph |
129 |
1.15 |
207 A |
238.1 A |
16900 lbf |
16 ft |
63.4 in |
715 lb |
| SM1033 200HP460V |
3132-726 |
200 |
460V 3Ph |
147 |
1.15 |
236 A |
271.4 A |
16900 lbf |
16 ft |
68.5 in |
776 lb |
| SM1033 250HP460V |
3132-727 |
250 |
460V 3Ph |
185 |
1.15 |
297 A |
341.6 A |
16900 lbf |
16 ft |
71.7 in |
911 lb |
Electrical, thrust and lead figures from the catalog motor tables; length and weight from the catalog dimension tables by horsepower. — where the catalog prints no figure. Sources: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 185-187, 196-197; Baker Pumps and Accessories price list, effective 7/1/2026.
Shared Specifications
| Included |
Motor with lead |
| Flange |
10 in |
| Insulation class |
Y |
| Degree of protection |
IP68 |
| Cooling flow past the motor |
1.64 ft/sec |
| Voltage tolerance |
+10% |
| Maximum starts |
10 per hour |
| Maximum operating depth |
984 ft |
| Maximum operating pressure |
425 PSI |
| Water temperature rating |
85°F |
| Speed |
Two-pole, about 3450 RPM at 60 Hz |
| Frequency |
60 Hz |
| App connection |
None |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 185-187, 196-197.
Performance — Electrical Data
A submersible motor is sized to the pump end: the same horsepower, the same flange, and enough downward thrust capacity for the pump. The figures below are the catalog electrical data, for sizing the breaker, starter or drive and the drop cable.
| HP |
Power |
Efficiency (%) |
Power Factor |
Locked Rotor / Rated Amps |
Lead Conductors |
| 125 |
460V 3Ph |
84 |
0.90 |
6.0 |
3x35+1x35 |
| 150 |
460V 3Ph |
84 |
0.84 |
5.7 |
3x35+1x35 |
| 175 |
460V 3Ph |
85 |
0.85 |
6.3 |
3x35+2x35 |
| 200 |
460V 3Ph |
85 |
0.85 |
6.1 |
3x35+2x35 |
| 250 |
460V 3Ph |
85 |
0.85 |
5.6 |
3x35+2x35 |
Electrical data at 60 Hz as printed. Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 185-187, 196-197.
Before You Buy — The Limits That Decide the Fit
| Well size |
Built for 10 in diameter or larger water wells |
| Cooling |
1.64 ft/sec of water flow past the motor |
| Water temperature |
Rated to 85°F |
| Starts |
10 per hour |
| Setting depth |
Up to 984 ft operating depth; up to 425 PSI operating pressure |
| Control |
Three-phase motors need a starter kit or drive |
| Voltage |
Match voltage and phase to your service; tolerance +10% |
| Application |
Water wells; the manufacturer excludes use in swimming areas |
Materials of Construction
| Shaft |
Stainless steel |
| Shaft end |
Stainless steel AISI 304 |
| Mechanical seal |
Ceramic and carbon |
| Bearing ring |
Carbon |
| Cable |
NBR |
| Structural parts |
Cast iron |
| External sleeve |
Stainless steel AISI 304 |
| Thrust bearing, rotating |
Carbon with antimony |
| Thrust bearing, stationary |
AISI 420 |
| Diaphragm |
NBR-EPDM |
| Bolts and screws |
Stainless steel AISI 304 |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 185-187, 196-197.
