Bullet by MARSHALLTOWN CenterFire SuperShear Spray Foam Insulation Corded Open Cell Saw

Description

Engineered to meet commercial weatherization specs, the CenterFire SuperShear Open Cell Saw trims excess spray foam flush against wall studs without creating airborne dust. Dual reciprocating serrated blades shear open-cell foam flush to studs in single passes. The high-torque corded motor powers continuous wall passes, though trimming dense closed-cell foam causes blade bind and motor heat.

Constructed with an extruded aluminum blade guide bar and a glass-filled nylon gear housing, this insulation saw resists rough drop impacts on jobsite floors. A 120V corded electric motor draws 8A, driving twin counter-reciprocating serrated blades through an orbital stroke mechanism at 3,200 SPM. Total tool weight equals 16 lbs. The slim tool chassis measures 40in long by 6in wide, allowing close trimming between 16in on-center wooden wall studs.

Key Features of Bullet CK53-0027

Insulation contractors buy Bullet CK53-0027 saws to speed up open-cell foam trimming on commercial projects. Weatherization teams evaluate tool pricing to equip crews with dedicated stud-flush foam shears.

• The 120V 8A motor generates 3,200 strokes per minute to slice through open-cell foam without tearing.
• Twin counter-reciprocating serrated steel blades cancel out tool vibration in the operator’s hands.
• A rigid aluminum guide spine holds the blades flat against wall studs for flush cuts.
• The open-cell blade profile cuts foam flush without producing fine airborne static dust.
• An ergonomic dual-grip handle provides balanced tool guidance across tall wall bays.
• Hardened steel drive gears sustain prolonged run cycles during multi-room insulation jobs.
• A quick-release blade clamp system allows fast blade swaps without specialized shop tools.

Reciprocating Speed Vibration Cut Testing

Jobsite tests in 0.5-pound open-cell polyurethane foam confirm stud-flush trimming without gouging wooden studs. The counter-reciprocating blade mechanism cuts hand-arm vibration down to 2.4 m/s², maintaining 3,100 SPM under sustained cutting resistance. Noise levels hold at 81 dB during active cutting passes. Motor casing heat climbs by 22°F to stabilize at 98°F after trimming ten consecutive 8-foot stud bays. The extruded aluminum guide spine shows zero lateral deflection under 12 lbs of side pressure against wall studs.

Field Usability Periodic Maintenance Schedule

The dual-trigger grip requires 4 lbs finger pressure to run, while guiding the saw flat across wall studs calls for 8 lbs forward arm push. Do not use this open-cell foam saw for dense closed-cell polyurethane foam, fiberglass batts, or rigid foam board.

• Blow foam dust from motor air vents with clean compressed air every 4 hours of use.
• Apply light mineral oil along the reciprocating blade guide channels every 8 hours of sawing.
• Inspect blade clamp screws and check gear case grease levels every 30 days of operation.

Factory Package Crate Warranty Terms

MARSHALLTOWN covers this CenterFire saw with a 1-Year commercial warranty against material defects. The package includes the CK53-0027 corded power saw, a set of 36in open-cell serrated blades, blade guide spine, blade removal wrench, hex keys, and an illustrated factory instruction manual.