Dewalt DW4821B25 Bi-metal Reciprocating Saw Blade 18 Tpi

Product Description

The DEWALT DW4821B25 is a bulk pack of 25 bi-metal reciprocating saw blades designed for demanding cutting tasks in trade and professional applications. Each blade measures 8 inches in length with an 18 TPI (teeth per inch) straight-back configuration, making it well-suited for fine-tooth cutting in metal, conduit, pipe, and similar materials. The bi-metal construction combines a high-speed steel cutting edge with a flexible alloy steel body, delivering both edge retention and resistance to blade fatigue during extended use. This bulk quantity is practical for contractors, electricians, plumbers, and HVAC technicians who consume blades regularly on active job sites.

These blades are intended for use with standard reciprocating saws in residential and commercial construction, mechanical, and service applications. The 18 TPI count targets thinner stock and tubing where a finer tooth pitch produces cleaner cuts and reduces burring. Typical uses include cutting metal conduit, copper and iron pipe, threaded rod, and sheet metal in tight or overhead access areas where an angle grinder or pipe cutter cannot fit. The straight-back blade profile is compatible with the majority of standard reciprocating saw chucks on the market.

Key Features

• Bi-metal construction for durability and flex resistance during heavy cutting cycles
• 8-inch blade length provides reach in confined or deep-cut applications
• 18 TPI straight-back profile delivers fine, controlled cuts in metal and pipe
• Bulk pack of 25 blades reduces procurement frequency for high-volume users
• Straight-back design fits most standard reciprocating saw chuck systems

Compatibility

Designed as an OEM-style replacement blade for use in standard reciprocating saws accepting universal shank bi-metal blades. Verify chuck compatibility with your specific tool before installation.

Installation Notes

Blade changes should be performed by a qualified tradesperson with the tool unplugged or battery removed before accessing the chuck. Use appropriate eye protection and gloves when handling saw blades, as cutting edges are sharp. Follow the tool manufacturer's chuck-engagement procedure to ensure the blade is fully seated and locked before operation. Discard bent or chipped blades immediately rather than continuing use.

Technical Specifications

• Blade Length: 8 inches
• Teeth Per Inch (TPI): 18
• Blade Style: Straight Back
• Blade Material: Bi-Metal
• Pack Quantity: 25 blades
• Weight: 1.45 pounds
• UPC: 028877338248

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW4821B25