Chopper

Chopper

Definition

A chopper is a manual or pneumatic cutting machine designed to precisely cut picture frame molding at specific angles. It is primarily used to create clean miters or angled cuts for accurate corner joining in picture framing.

Purpose and Usage

• Creates accurate angled cuts for corners, ensuring tight-fitting joints.
• Speeds up the framing process by providing consistent, repeatable cuts.
• Supports a range of cutting angles, typically for miters (45°) or compound angles for specialized frames.

Types of Choppers

• Manual Chopper: Requires hand operation, typically with a lever or sliding arm; ideal for small shops or occasional use.
• Pneumatic Chopper: Uses air pressure to drive the blade; provides faster, more consistent cuts, suitable for high-volume framing.
• Precision Features: Some choppers include adjustable stops, angle gauges, and blade guards for improved safety and accuracy.

Best Practices

• Ensure molding is properly secured in the chopper before cutting.
• Keep blades sharp to prevent tearing or splintering of the wood or composite molding.
• Measure and mark molding precisely before cutting, even with a chopper.
• Regularly maintain the machine, including lubrication and blade inspection, to ensure long-term accuracy and safety.

Related Terms

• Biscuit
• Butt Joint
• Miter Joint
• Lap Joint