KM4000 Milling Machine

Designed specifically for machining extra-wide keyways, stress relief grooves, motor mounting slots, and more.

The KM4000 portable keyway milling machine is a compact, rugged unit ideal for machining extra-wide keyways, stress relief grooves, motor mounting slots, and various other applications.

Compact Design, Powerful Performance

• Compact design requires only 8.5 inches (215.9 mm) of shaft length for mounting with no obstructions, and only 10.5 inches (266.7 mm) with obstructions.

• Can be mounted on shafts ranging from 4 to 24 inches (101.6 – 609.6 mm) in diameter and positioned anywhere along the shaft, offering exceptional flexibility.

• Universal motor coupled with a three-stage gear reduction system delivers ample torque for efficient cutting.

• Anti-friction bearings throughout enhance performance and extend service life.

• Capable of machining new keyways up to 3.25 inches (82.6 mm) wide and 7.88 inches (200.2 mm) long in a single setup.

• 2-inch (50.8 mm) cross-travel allows for machining wide or long keyways using a single end mill.

High-Quality Components, Efficient Operation

• Self-centering, self-aligning profile base ensures perfect keyway alignment with the shaft.

• Precision-ground dovetail ways provide smooth longitudinal and cross movement for accurate machining.

• Precision Acme lead screws with roller thrust bearings ensure smooth operation and precise positioning.

• Adjustable dials with zero-reset function enable precise control of cutting depth.

• Fully sealed lubrication system allows for operation at various angles, enhancing versatility.

• Optional drill motor attachment enables rapid longitudinal movement, reducing setup time.

• Motor features soft start and maintains consistent speed under increasing load, ensuring uniform machining results.

Specifications

Industries Served

The KM4000 is widely used in the following industries:

• Construction

• Bridge Building & Repair

• Power Generation

• Shipbuilding

• Pulp & Paper

• Steel & Aluminum Processing

Typical Applications

• Machining keyways on tapered shafts

• Milling stress relief grooves in bridge decks

• Machining motor mounting slots in plates or I-beams

• Cutting inspection windows in vessels

• Machining keyways on motor shafts

Mounting Options

• Shaft End Mounting: Requires only 8.5 inches (215.9 mm) of shaft length with no obstructions, and only 10.5 inches (266.7 mm) with obstructions. (Note: The KM4000 can machine keyways within 2.2 inches (55.88 mm) of an obstruction.)

• Mid-Shaft Mounting: The machine can be leveled for machining long keyways.

• Tapered Shaft Mounting: Shims are used to adjust the clamping.

Setup and Operation

Install the end mill into the spindle of the KM4000 portable keyway milling machine, then mount the machine onto the shaft—operation is that simple. For straight shafts, an experienced operator can set up the machine and be ready to machine a new keyway in 15 minutes!

Shim adjustments for tapered shafts may take slightly longer.

The KM4000 features 2.0 inches (50.8 mm) of cross travel, enabling the use of smaller, more economical end mills to machine wide or long keyways. The graduated cross slide is positioned using a hand crank.