DeWalt Bi-Metal Reciprocating Saw Blades DW4821B 8 Inch 100 Pack Sawsall Set (18 TPI Heavy Gauge Pipe Conduit Angle Iron Steel Demolition Slicing)

DeWalt DW4821B 8-Inch 18 TPI Bi-Metal Reciprocating Saw Blades (100-Pack)

The DeWalt DW4821B 8-inch 18 TPI bi-metal reciprocating saw blades cut, crop, and demolish heavy-gauge metals, structural steel angle iron, thick-wall black iron pipe, and rigid electrical conduit. Engineered with an aggressive shank angle and patented sharp tooth geometry, each blade maximizes tooth engagement per stroke to deliver exceptionally rapid, straight cutting action through industrial alloys. Featuring a high-durability bi-metal construction with an electron-beam welded high-speed steel cutting edge, a flexible spring steel back, and a friction-reducing anti-stick coating, this bulk 100-piece pack equips mechanical contractors, commercial electricians, and demolition crews with shatter-resistant performance and up to 50% longer operational life across heavy production jobsites.

Best Used For:

• Commercial Electrical Conduit Installation: Slicing cleanly through bundles of intermediate metal conduit (IMC), electrical metallic tubing (EMT), and rigid steel conduit without binding.
• Mechanical and Plumbing Pipe Cutting: Sectioning schedule 40/80 black iron, galvanized steel pipe, copper mains, and cast-iron drainage lines during retrofits.
• Structural Demolition and Metal Framing: Cropping structural steel studs, heavy angle iron, threaded rod arrays, and unistrut framing channels on commercial builds.

Key Performance & Safety Features

• Up to 50% Extended Operating Life: Patented toothforms optimize chip evacuation to lower cutting friction and maintain sharp cutting edges through dense metals.
• Fast-Cut 18 TPI Tooth Geometry: Fine-pitch teeth deliver smooth, burr-free cuts across medium-to-heavy gauge sheet metals and structural piping.
• Aggressive Tapered Shank Angle: Enhances continuous tooth contact throughout the stroke cycle for accelerated feed speed and forceful cutting penetration.
• Shatter-Resistant Bi-Metal Construction: Electron-beam welds a hardened high-speed steel cutting edge to a flexible alloy backing to eliminate blade snapping under heavy torque.
• Friction-Reducing Anti-Stick Coating: Minimizes heat buildup and prevents pitch or metal gumming during repetitive cutting cycles.
• Bulk 100-Piece Contractor Packaging: Reduces per-cut operating expenses and ensures high-volume fabrication crews remain fully equipped on the jobsite.

What's Included

• (100) DeWalt DW4821B 8-Inch 18 TPI Bi-Metal Reciprocating Saw Blades

Technical Specifications

Pro-Tip: When cutting thick-walled pipe or structural angle iron, rock the saw forward and back slightly during the cut; this oscillating motion decreases the instantaneous contact surface area, accelerating chip clearing and keeping blade operating temperatures low for maximum tooth longevity.