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Alpha Ultracut APR Series Flush Cutting Blades
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At a Glance
Quick Decision Guide
Blade Diameter
4-1/2"
Blade Thickness
1.7mm
Maximum RPM
13,200
Arbor
20mm Quad Drive
Primary Application
Flush Cutting
Tool Compatibility
Angle Grinders with Quad Drive Adapter
Material Compatibility
Metal, Wood, Plastic, Composites, Masonry & Concrete
Common Uses
Anchor Bolts, Rebar, Pipe & Protruding Materials
Why Choose This Product
Key Benefits
Close Surface Cutting
Cuts protruding materials flush with floors, walls and surrounding surfaces
Multi-Material Performance
Cuts metal, wood, plastic, composites, masonry and concrete
Jobsite Applications
Removes anchor bolts, rebar, pipe and other protruding materials
Quad Drive System
Uses Alpha's specialized adapter for angle-grinder flush cutting
No Conventional Lock Nut
Adapter design provides the clearance needed for close cutting
Three Blade Sizes
Available in 4-1/2", 5" and 7" diameters
Product Information
Product Details
Specifications
Brand
Alpha®
Part Number
APR45QA
UPC
749173610035
Product Type
Flush Cutting Blade
Series
Ultracut APR
Blade Diameter
4-1/2"
Blade Thickness
1.7mm
Maximum RPM
13,200
Arbor
20mm Quad Drive
Primary Application
Flush Cutting
Tool Compatibility
Angle Grinders with Alpha Quad Drive Adapter
Mounting System
Quad Drive Adapter
Lock Nut Requirement
Conventional Lock Nut Not Required with Quad Drive Adapter
Common Cutting Applications
Anchor Bolts, Rebar, Pipe & Protruding Materials
Metal Compatibility
Angle Iron, Pipe, Electrical Conduit, Rebar, Metal Studs, Structural Metal, Sheet Metal, Grid & Stainless Steel
Additional Materials
Wood, Plastics, Composite Materials, Masonry & Concrete
Application Environment
Manufacturing Facility & Jobsite
About This Product
Flush Cutting Blades for Metal, Masonry and Concrete
Alpha® Ultracut APR Series Flush Cutting Blades are high-performance vacuum-brazed diamond blades for cutting close to floors, walls, and other surrounding surfaces. When paired with the appropriate Alpha® Quad Drive Adapter, the blade mounts on a compatible angle grinder without a conventional lock nut, providing the clearance needed for accurate flush cutting.
Cut Anchor Bolts, Rebar and Pipe Flush
The APR Series provides a practical solution for removing anchor bolts, concrete rebar, pipe, and other protruding materials from floors and walls. Its specialized design supports controlled flush cuts in manufacturing, fabrication, construction, renovation, demolition, and jobsite applications.
Multi-Material Cutting Capability
Each flush cut blade can cut angle iron, pipe, electrical conduit, rebar, metal studs, structural metal, sheet metal, grid, stainless steel, wood, plastic, composite materials, masonry, and concrete. This broad material range reduces blade changes when a project involves several construction and fabrication materials.
20mm Quad Drive Mounting in Three Blade Sizes
APR Series blades use a 20mm Quad Drive arbor and require a compatible Alpha® Quad Drive Adapter for angle-grinder mounting. The threaded adapter eliminates the conventional lock nut used with standard grinder blades. Blade diameters include 4-1/2", 5", and 7" for different cutting depths and tool configurations.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What is the Alpha Ultracut APR Series designed for?
The APR Series is designed for flush cutting applications where material must be cut close to a floor, wall, or surrounding surface. Common uses include removing anchor bolts, concrete rebar, and pipe.
What materials can Ultracut APR flush cutting blades cut?
The blades cut angle iron, pipe, electrical conduit, rebar, metal studs, structural metal, sheet metal, grid, stainless steel, wood, plastic, composite materials, masonry, and concrete.
What grinder and adapter are required for the APR Series?
Each blade has a 20mm Quad Drive arbor and requires a compatible Alpha® Quad Drive Adapter. An appropriate adapter allows the blade to mount on an angle grinder with a 5/8"-11 spindle. Alpha also offers a comparable adapter for M14-2 grinders.
Does an APR flush cut blade require a standard lock nut?
No. The Alpha® Quad Drive Adapter uses a threaded arbor and eliminates the conventional lock nut, allowing the blade to cut closer to the surrounding surface.
What sizes and maximum RPM ratings are available?
The 4-1/2" APR45QA is rated for a maximum of 13,200 RPM, the 5" APR05QA for 12,200 RPM, and the 7" APR07QA for 8,400 RPM.
Can the Ultracut APR Series be used with water?
Yes. Alpha states that water can reduce dust and improve blade performance and service life. Use water only with equipment and electrical protection approved for wet cutting.
Is the Ultracut APR recommended for granite or porcelain?
No. Alpha recommends a sintered metal-bond diamond blade instead of the vacuum-brazed APR Series for granite and porcelain. If these materials must be cut with the APR blade, Alpha recommends using water to cool the cutting edge.
Can an Ultracut APR blade be used for grinding?
No. The APR Series is designed for flush cutting and is not intended for grinding. The diamond layer beneath the steel core protects against undercutting and is not a grinding surface.