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This line boring machine is an even more compact and affordable version of our top-selling BB5000 line boring machine, with the mounting flexibility needed for work in restrictive spaces. A variety of motor and bar options add power to this outstanding value.

Contact us today for more info, or check out our entire line of line boring machines.

Product Specifications

Bar Diameter:
1.75 inches (44.5 mm)
1.25 inches (31.8 mm) optional

Boring Diameter:
1.5 – 10 inches (38.1 – 254 mm)

Max. Stroke:
36 inches (914.4 mm)

Torque at Bar:
417 ft-lb hydraulic (565.4 N•m)

Power Option:
Electric, Pneumatic, or Hydraulic

Product Advantages

Quick and Easy Setup

Modular components make setup quick and easy.

Fast and easy setup using high quality cast-iron set-up cones and spherical bearing mounts.

Typical set-up time for an experienced operator is 30 minutes or less.


Over 100 ft lbs (135 N•m) of torque at the bar.

Specially-designed rotational drive unit provides a 4:1 worm gear reduction for increased torque at all speeds.


Extremely compact, and can be used easily in cramped, tight work spaces.

Compact design completes jobs where other machines won’t fit.

Affordable and Flexible

The CLIMAX BB4500 Portable Boring Machine is your “best-value” portable boring machine.

Through-bar design allows the rotational drive and feed unit to be mounted anywhere along the bar, even separate from one another.

CLIMAX-patented mounting components provide the flexibility to handle challenging boring jobs even when space is limited.


Available with electric, hydraulic, or pneumatic motor options.

Reversible electric motor.

Fast, easy two-bolt change-out process to switch motors.

Available in a variety of bar lengths, from 4 to 20 feet (1219.2 to 6096 mm) Bars are straightened, and have ½ inch or 12 mm square-broached tooling holes.

Many accessories available, including small bore kit, facing and grooving head options, and bore measuring tool.

Quality Components

Keyed, chromed 1-¾ inch (44.5 mm) bar.

World’s best rotational drive and axial feed unit.

Patented mounting system.

High-quality components provide smooth, reliable operation to get the job done.