MPM04 — 4" Oil Filled Submersible Motor
Majestic Pump's 4-inch (100 mm) oil-filled submersible motor — a wet-type, oil-cooled and oil-lubricated borewell motor built to drive submersible pumps reliably, in single & three-phase from 0.5 to 10 HP.
MPM04 Oil Filled Submersible Motor
A 4-inch (100 mm) wet-type oil-filled submersible motor designed to drive Majestic Pump submersible pumps. The non-toxic, eco-friendly dielectric oil keeps the windings cool and the bearings well lubricated for smooth, trouble-free running. High-temperature insulated windings, oil-lubricated bearings and a high-strength stainless-steel shaft make it dependable in continuous duty — available in single & three-phase up to 7.5 kW, in Stainless Steel or Cast Iron upper-housing constructions.
Overview
The MPM04 is built for the realities of deep-well pumping. Fully sealed to IP 68 and filled with a clean dielectric oil, it cools and lubricates itself as it runs — so the windings stay protected and the bearings keep turning smoothly through long, continuous duty cycles. Direct coupling to the pump via a NEMA-standard keyway or spline keeps the set compact and efficient, while a stainless-steel shaft and pressure-equalizing diaphragm guard against wear and the pressure swings of borewell operation. One frame, two supplies: choose single-phase for domestic and light farm duty, or three-phase for heavier continuous loads.
Oil-Cooled & Lubricated
A non-toxic, eco-friendly oil of high dielectric strength cools the windings and lubricates the bearings for cool, quiet, low-wear running.
IP 68 Sealed Build
Sealed for permanent submersion, with Class F insulation and S1 continuous duty for years of dependable underwater service.
Single & Three-Phase
0.5–3.5 HP single-phase (CSR start) and 0.5–10 HP three-phase (DOL start) from a single 4-inch frame.
Technical Details
Technical Data
Features
- Suitable for 100 mm (4") and larger borewells
- Available with Capsule Couple or Spline Couple
- Non-toxic, eco-friendly oil-filled design with high dielectric strength
- High-strength stainless-steel shaft
- Enameled copper winding wire
- Anti-friction ball bearings for long service life
- Pressure-equalizing spring-loaded diaphragm
- Stainless Steel or Cast Iron upper-housing constructions
- Built to NEMA standard
Applications
Standards & Compliance
- Manufactured to NEMA standard
- IP 68 degree of protection (continuous submersion)
- Class F insulation system
- S1 continuous duty rating
FAQ
What borewell size does the MPM04 fit?
It's a 4-inch (100 mm) motor with a 98 mm maximum outer diameter, so it fits 100 mm (4") and larger borewells.
Should I choose single-phase or three-phase?
Single-phase (0.5–3.5 HP, CSR start) suits domestic and light farm supplies; three-phase (0.5–10 HP, DOL start) is better for higher, continuous loads where a 3-phase supply is available. See the Technical Data tabs for ratings.
Why an oil-filled motor?
The non-toxic dielectric oil both cools and lubricates the motor, giving low-wear, trouble-free operation and a long service life without periodic re-greasing.
Can it be supplied matched to a Majestic pump?
Yes — the MPM04 is rated to pair directly with our submersible pumps via its NEMA-standard coupling, so you can order a complete, ready-to-run set.
Do you supply export quantities?
Yes — bulk and container-load supply with export-ready documentation. Reach out to our team for pricing and lead times.
Get a quote for the MPM04
Share your borewell size, head and flow — we'll confirm the right rating, pricing and lead time.
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