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Master Power ® - Cooper - Stuhr
Die Grinders

Die Grinder No. 4419

Nominal Motor Power:
0.3-0.5 Hp
0.22-0.37 kw

23,000 to 30,000 RPM

Front or rear exhaust

100% ball bearing construction

One piece spindle-hardened

Hardened and ground motor parts for long life

Trim comfortable ergonomic design enables excellent control

Aluminum housing

General
Air Inlet 1/4" NPT
Use 1/4" (6.4mm) I.D. hose
Performance rated & 90 psi (620 kPa) air pressure

Standard Equipment
71852000 1/4" Collet (Models 4419)
44003 1/4" Cooper Collet (Model 4413)
Collet Wrenches
Owners Manual
Parts Sheet

Optional Accessories
Collets:
4413
1/8" - 44001, 3/16" - 44002
4319 & 4419
1/8" Collet - 718523, 3/16" Collet - 718524

Die Grinder No. 4439

Nominal Motor Power:
0.5-0.9 Hp
0.37-0.67 kw

23,000 RPM

Front or rear exhaust

100% ball bearing construction

One piece spindle-hardened and chrome plated

Hardened and ground motor parts for long life

Ergonomically designed three bearing motor housing reduces vibration

All steel housing

General
Air Inlet 1/4" NPT
Use 1/4" (6.4mm) I.D. hose
Performance rated & 90 psi (620 kPa) air pressure

Standard Equipment
718515 1/4" 200 Series Collet
(Models 4438, 4439, 4538
Collet Wrenches
Owners Manual
Parts Sheet

Optional Accessories
Collets:
60538 Master Guard oil (4 oz.)
60539 Master Guard oil (1 qt.)
22034 Hose Line Oiler
Tune-up kit

Right Angle Die Grinder
No. 4414

Nominal Motor Power:
0.3-0.9 Hp
0.22-0.67 kw

15,000 to 23,000 RPM

Front or rear exhaust

100% ball bearing construction

Full feathering throttle
(Model 4414, 4417)

Exceptional long life with rugged, heat treated, precision gearing

Hardened and ground one piece spindle

Compact all steel housing
(Models 4529, 4530)

General
Air Inlet 1/4" NPT
Use 1/4" (6.4mm) I.D. hose
Performance rated & 90 psi (620 kPa) air pressure

Standard Equipment
Collets:
4414, 4417: No. 44003 - 1/4"
4529, 4530: No. 71852000 - 1/4"
Collet Wrenches
Owners MAnual
Parts List

Optional Accessories
Collets:
4414: 1/8" (3.2 mm) - 44001
4414: 3/16" (4.8 mm) - 44002
4417: 1/8" (3.2 mm) - 44001
4417: 3/16" (4.8 mm) - 44002
4529: 3/16" (4.8 mm) - 44002
4530: 3/16" (4.8 mm) - 44002
Slide Handle: 80170500

Heavy Duty Die Grinder
No. 4448

Nominal Motor Power:
1.5 Hp
1.1 kw

17,000 RPM

Non-Governed

One piece hard chrome spindle is supported by four precision ball bearings for super toughness, less runout and long life.

Unique floating rotor design made up of hardened and ground motor parts

Steel motor housing - withstands rugged uses

General
Air Inlet 3/8" NPT
Use 3/8" (9.6mm) I.D. hose
Performance rated & 90 psi (620 kPa) air pressure

Standard Equipment
Wheel Collar
1/4" Collet
Two Collet Wrenches

Owners Manual
Parts Sheet
Optional Accessories
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