6″ · KM6

Submersible motors · 6″ borehole

KOMAX KM6 Series:6” Submersible Water-Cooled Motor

6″ water-cooled motors for agriculture and municipal wells, from 5.5 to 75 HP. Single flange / Flat Top as standard, double flange optional, in cast iron with a stainless jacket or complete 316 stainless.

Power range: 5.5 HP (4 kW) – 75 HP (55 kW)Single flange / Flat Top up to 50 HP (37 kW)
Speed: 2-pole2,900 rpm @ 50 Hz · 3,600 @ 60 Hz
Voltage: 380–415 V50 Hz · 230 / 380 / 460 V @ 60 Hz
Mounting: Single flange / Flat TopDouble flange optional
Thrust load: 26,600 NMitchell type
Immersion: 150 mMax. depth · IP68

ConstructionStandard · Cast iron with NSF Certified EpoxyOptional · SS316 & SS2205 (Duplex Steel)Optional · Double flange

Request a quote Datasheet & catalog Find your model

IEC 60034-1NSF/ANSI/CAN 61CEPSQCA

Construction

What’s inside, part by part.

Taken from the cross-section in the catalog. Each detail exists to keep sand out, heat down and the shaft true.

01 · SEALING

Three layers of protection

A seal protector resists sand, clay and mud at 3,500 rpm, a lip/oil seal stops fine sand, and a spring-loaded silicon-carbide mechanical seal closes it.

02 · BRACKETS

GG25 with SS304 jacket

Upper and lower sockets in cast iron with an 8 mm wall, covered in SS304 sheet. 100% leak-proof and explosion-proof.

03 · SHAFT

SS431 hardened to 40 HRC

Integral single-piece shaft, fully machined and ground along its length for stiffness and accuracy.

04 · STATOR

High-grade silicon steel

Low core losses mean higher efficiency, lower current and lower heat. Ends welded to threaded flanges.

05 · WINDING

BOPP+BOPET copper

Pure copper with higher-temperature insulation than PE/PA, an oversized gauge and mechanised coil insertion.

06 · THRUST

Mitchell-type thrust bearing

Self-aligning, water-lubricated sliding blocks rated for 26,600 N (61,600 N on 60–75 HP double-flange models).

IP68Protection

A / BInsulation class

50 °CAmbient water

+6/−10%Voltage tolerance

Vertical*Mounting

16 cm/sMin. cooling flow

150 mMax. immersion

20Max. starts / hour

Rotation CCW facing shaft end · Water + non-toxic antifreeze filler · Wooden case packing.

Electrical data

Three-phase motor data for every rating.

Scroll sideways on small screens →

50 Hz · 380–415 V
	Motor size			Current (A)		Efficiency % at load			Power factor (cos φ) at load
Motor type	HP	kW	RPM	Full load	Safety	50	75	100	50	75	100	SF
KM6 055T	5.5	4	2,815	10.0	—	73.3	76.0	75.6	0.61	0.72	0.79	1.00
KM6 075T	7.5	6	2,810	13.2	—	73.2	76.7	76.4	0.60	0.73	0.80	1.00
KM6 100T	10	8	2,830	16.9	—	75.8	78.6	78.3	0.61	0.74	0.81	1.00
KM6 125T	12.5	9	2,840	20.8	—	78.2	80.9	80.2	0.60	0.73	0.81	1.00
KM6 150T	15	11	2,830	24.5	—	78.6	81.3	80.8	0.61	0.74	0.82	1.00
KM6 175T	17.5	13	2,845	28.4	—	80.4	82.4	81.4	0.61	0.74	0.81	1.00
KM6 200T	20	15	2,845	31.2	—	81.0	82.8	82.7	0.63	0.76	0.83	1.00
KM6 250T	25	19	2,845	39.4	—	82.9	83.7	83.2	0.62	0.75	0.82	1.00
KM6 300T	30	22	2,835	47.4	—	82.0	83.9	83.3	0.62	0.75	0.82	1.00
KM6 350T	35	26	2,855	56.0	—	84.1	85.4	84.4	0.59	0.72	0.80	1.00
KM6 400T	40	30	2,850	63.9	—	84.1	85.2	84.2	0.59	0.72	0.80	1.00
KM6 500T	50	37	2,820	80.2	—	83.8	84.1	82.7	0.61	0.74	0.81	1.00
KM6 600T	60	45	2,780	96.7	—	83.9	83.1	81.2	0.62	0.76	0.82	1.00
KM6 700T	70	52	2,780	113.0	—	83.1	82.6	80.7	0.63	0.76	0.83	1.00
KM6 750T	75	55	2,785	122.0	—	83.4	82.9	80.6	0.62	0.75	0.82	1.00

60 Hz · 460 V
	Motor size			Current (A)		Efficiency % at load			Power factor (cos φ) at load
Motor type	HP	kW	RPM	Full load	Safety	50	75	100	50	75	100	SF
KM6 055T	5.5	4	3,445	8.8	9.9	70.5	74.7	75.4	0.59	0.71	0.77	1.15
KM6 075T	7.5	6	3,440	11.7	13.1	71.4	75.2	76.4	0.60	0.72	0.79	1.15
KM6 100T	10	8	3,450	15.1	17.0	74.5	79.5	78.9	0.58	0.71	0.79	1.15
KM6 125T	12.5	9	3,460	18.2	20.5	78.5	81.2	81.4	0.60	0.72	0.79	1.15
KM6 150T	15	11	3,450	21.7	24.5	78.1	81.0	81.2	0.60	0.72	0.80	1.15
KM6 175T	17.5	13	3,455	24.9	27.9	79.3	82.2	82.1	0.61	0.73	0.80	1.15
KM6 200T	20	15	3,450	27.8	31.6	79.8	82.4	82.3	0.62	0.75	0.82	1.15
KM6 250T	25	19	3,450	34.8	39.3	81.2	83.7	83.6	0.62	0.74	0.80	1.15
KM6 300T	30	22	3,460	42.0	47.2	82.6	84.0	84.4	0.61	0.74	0.79	1.15
KM6 350T	35	26	3,465	48.5	54.6	83.5	85.6	85.9	0.59	0.71	0.79	1.15
KM6 400T	40	30	3,460	55.1	62.2	83.9	85.7	85.8	0.59	0.72	0.79	1.15
KM6 500T	50	37	3,440	69.7	78.9	83.7	85.0	83.9	0.60	0.73	0.80	1.15
KM6 600T	60	45	3,420	83.1	94.9	84.4	84.9	83.2	0.62	0.74	0.81	1.15
KM6 700T	70	52	3,420	95.9	109.9	84.1	85.2	83.3	0.63	0.76	0.82	1.15
KM6 750T	75	55	3,415	102.6	116.3	85.3	86.0	84.3	0.61	0.74	0.81	1.15

Values as published in catalog KM-R0426. Safety-factor current applies at 60 Hz (SF 1.15).

Construction options

Choose the metallurgy for your water.

Not sure which? Send us a water analysis with your enquiry and we’ll recommend one.

Standard

Cast iron, NSF-certified epoxy

The right choice for most fresh-water wells: agriculture, municipal supply and general industrial duty.

Brackets & housingsCast iron, NSF Certified Epoxy
ShaftAISI 431 stainless
Fasteners & flangesAISI 304/316
Drinking waterNSF/ANSI/CAN 61

Optional

SS316 & SS2205 (Duplex Steel)

For saline, brackish or chemically aggressive water, coastal installations and food or pharma process water.

Brackets & housingsSS316 or SS2205 duplex
ShaftAISI 431 / SS316
Fasteners & flangesSS316
Best forCorrosive / saline wells

Request a quote

Quote a KM6 for your project.

Pick the model, or just give us flow and head. An application engineer will reply with a selection, lead time and pricing, normally within one working day.

KOMAX KM6 Series:6” Submersible Water-Cooled Motor

The 6″ motor engineers specify for boreholes.

Typical applications