Product Description
Milwaukee Jig Saw Blade Bi-Metal 8 TPI 4 in. — 5 Pack
Model Number: 48-42-0850
The Milwaukee 48-42-0850 is a 5-pack of 4 in. Bi-Metal 8 TPI Jig Saw Blades — professional-grade bi-metal blades engineered for fast, durable cutting in wood, nail-embedded wood, and general construction materials. Milwaukee designs and manufactures bi-metal jig saw blades with precise material specification, tooth geometry, and heat treatment for real-world professional performance in the cutting applications that contractors and tradespeople encounter daily. Bi-metal construction bonds high-speed steel teeth to a flexible alloy steel blade body using a friction welding process that creates a full-length metallurgical bond — the HSS teeth provide the cutting edge hardness needed for wood cutting performance and wear resistance against nail and fastener impacts in remodel work, while the flexible alloy steel body absorbs the bending and vibration stress cycles of jig saw operation without blade body fracture, extending blade life significantly compared to all-HSS blades in the same applications.
The 8 TPI tooth specification provides fast cutting speed in dimensional lumber, plywood, OSB, and general construction wood materials — at 8 TPI, each tooth removes a larger chip per stroke than finer-tooth specifications, delivering faster material removal rates for production cutting in framing lumber, rough cutting, substrate work, and construction carpentry where cut speed is the priority and cut edge finish quality is a secondary consideration. The bi-metal 8 TPI specification is particularly well-suited for cutting through nail-embedded wood in remodel and demolition applications where occasional nail contact is expected — the HSS tooth edge has greater toughness than carbide and is more resistant to catastrophic fracture when it contacts embedded metal fasteners during cutting. The 5-pack provides the multi-blade supply for production cutting projects and remodel work where frequent blade changes maintain consistent cutting performance.
Milwaukee bi-metal jig saw blades are available in TPI specifications from 6 TPI coarse-cut through 24 TPI fine-cut, and in blade lengths from 2-3/4 in. through 6 in. for specific material thickness and access requirements — see the complete Milwaukee jig saw blade lineup for all specifications.
Features
- Bi-metal construction — HSS teeth for cutting performance and nail impact resistance
- Friction-welded full-length HSS/alloy bond for durability under jig saw bending loads
- 8 TPI for fast cutting speed in dimensional lumber, plywood, and construction materials
- Flexible alloy body resists fracture during nail-embedded wood cutting in remodel applications
- 5-pack for production cutting projects requiring sustained blade supply
Specifications
- TPI: 8
- Length: 4 in.
- Construction: Bi-Metal (HSS Teeth / Alloy Steel Body)
- Quantity: 5 Pack
- Application: Wood, Plywood, OSB, Nail-Embedded Wood, Construction Lumber
Includes
- (5) Milwaukee 48-42-0850 Bi-Metal Jig Saw Blades 8 TPI 4 in.
