About the Attachment Section 2 Page 5
MSD SABER SERIES SHEARS
ATTACHMENT GLOSSARY continued
Guide Blade A replaceable component located opposite the cutting blades in the lower shear. The main purpose of
the guide blade is to support the upper shear during the cutting cycle. This is a very important
maintenance item.
Guide Blade Thin metal shims used to adjust the guide blade out to maintain the proper guide blade gap. Shims come
Shims in a designated set that determines when the guide blade will be indexed or replaced.
Guide Blade The gap between the front wear plate and the guide blade as the upper shear is cycled into the lower.
Gap This is an important maintenance item to ensure longevity of the shear’s structure.
Hardsurface Welding process for protecting the parent material of the shear jaws. The hardsurface acts as a wear
surface.
Hub Shims Thin metal, circular shims used in the main pivot group of LaBounty shears. Hub shims provide factory
adjustment of the upper shear for close blade tolerance.
Lifting Points Small holes in the top of the shear to be used when mounting or transporting the shear. There are two
holes near the front of the shear and one lug at the rear. These points must never be used for cable
hanging the shear for cutting operations.
Lower The frontal area of the lower shear through which the upper piercing tip passes. This area contains the
Piercing Area guide blade and the cross blade.
Lower Shear The lower stationary jaw of the shear. The lower shear contains the lower cutting blades, the guide blade,
and the cross blade.
Lower Wear Replaceable, abrasion-resistant wear plates that protect the cross plate of the lower shear.
Plates
Main Bearing Hardened bushings that the main shaft of the shear rotates on during operation. There are two main
bearings, bolted in on both sides of the main pivot group.
Main Pivot High tolerance area of the shear that contains the two main bearings, two thrust washers, main shaft,
Group hub shims and two end caps.
Main Shaft The shaft on which the upper shear pivots causing the shearing action of the attachment.
Manifold Hydraulic block that directs the excavator’s hydraulic fl ow to the shear cylinder and rotation
Block assembly.
Motor Hydraulic rotation component that drives the turntable bearing or planetary gear box on rotating shears.
Mounting The bracket at the rear of the shear that allows it to be attached to the excavator. For a typical second
Bracket member mount, the mounting bracket pins to the excavator boom tip and stick cylinder.
Planetary Hydraulic rotation component on larger rotating shears. The planetary gear box rotates the body of the
Gear Box shear with hydraulic motor. The output shaft of the component directly drives the turntable bearing of the
rotating shear.
Rear Cylinder Pin that connects the rod end of the shear cylinder to the rear of the shear. The rear cylinder pin must be
Pin greased according to the required maintenance.
