Product Description
Milwaukee Jig Saw Bi-Metal 8 TPI 4 in. — 5 Pack
Model Number: 48-42-5850
The Milwaukee 48-42-5850 is a 5-pack of 4 in. Bi-Metal Jig Saw Blades at 8 TPI — professional-grade bi-metal reciprocating jig saw blades engineered and manufactured for the demanding performance requirements of professional users in construction, woodworking, remodeling, and general fabrication applications. Milwaukee designs and manufactures its jig saw blades with precise attention to the three key performance variables that determine real-world blade life and cutting performance: material specification, tooth geometry, and heat treatment. Bi-metal blade construction bonds a high-speed steel cutting tooth row to a flexible alloy steel blade body using a friction welding process that creates a continuous metallurgical bond along the full blade length — the HSS tooth material provides the high hardness needed for cutting edge retention and wear resistance in demanding cutting applications, while the flexible alloy steel body provides the fracture toughness needed to withstand the bending and vibration stress cycles that jig saw blades experience during curved, angled, and plunge cutting operations without blade breakage.
The 8 TPI tooth pitch is the general-purpose wood-cutting specification that balances two competing performance parameters: coarser tooth pitch (fewer teeth per inch) cuts faster because each tooth removes more material per stroke, while finer tooth pitch produces a smoother cut surface because more teeth are in contact simultaneously and each tooth removes less material. At 8 TPI, this blade provides the cutting speed needed for productive cutting through 2x dimensional lumber, plywood, OSB, engineered wood products, and composite materials while producing a cut surface quality acceptable for construction framing, substrate work, and rough carpentry applications where cut edge finish is not the primary concern. The 4 in. blade length provides adequate depth of cut for standard construction lumber dimensions and typical panel material thicknesses while maintaining compatibility with the stroke clearance of standard jig saws.
The 5-pack format provides the practical blade supply for projects involving extended jig saw use where progressive blade wear, occasional nail impacts in remodel work, or intentionally frequent blade changes to maintain cut quality through a project are anticipated needs.
Features
- Bi-metal construction — HSS teeth for cutting performance, flexible alloy steel body for durability
- Friction-welded HSS/alloy bond for full-length integrity without joint failure during cutting
- 8 TPI for fast wood cutting in dimensional lumber, plywood, and OSB
- 4 in. length for standard construction lumber and panel material depth of cut
- 5-pack for sustained project use with frequent changes or nail-impact replacements
Specifications
- TPI: 8
- Length: 4 in.
- Construction: Bi-Metal (HSS Teeth / Alloy Steel Body)
- Quantity: 5 Pack
- Application: Wood, Plywood, OSB, Engineered Wood, Construction Lumber
Includes
- (5) Milwaukee 48-42-5850 Bi-Metal Jig Saw Blades 8 TPI 4 in.
