Straight Flute Reamers
Rigid general-purpose geometry for sizing continuous through-holes and shallow blind holes.
CNC reamers collection
Precision CNC Reamers: Controlled Hole Finishing Tools
Bauron supplies reamer geometries for accurately sizing pre-drilled holes, controlling bore form, and supporting application-specific surface-finish requirements.
Precision hole finishing
Controlled Bore Geometry for Production and Toolroom Work
Reaming is a finishing process that removes a controlled allowance from a pre-drilled hole. Tool geometry, runout, alignment, stock allowance, cutting conditions, and chip direction all influence the resulting diameter and surface.
The Bauron portfolio covers rigid machine reaming, manual fitting, interrupted bores, blind and through holes, tapered forms, piloted profiles, repair applications, and custom multi-diameter features.
Core categories
Comprehensive Reamer Portfolio
Spiral Flute Reamers
Helical cutting edges provide progressive engagement across blind holes, cross-holes, keyways, and interrupted bores.
Machine & Chucking Reamers
Solid-body tools for controlled, repeatable hole finishing in rigid CNC, lathe, and production-machine setups.
Tapered & Form Reamers
Application-specific profiles for taper pins, Morse tapers, chambers, pilots, and multi-diameter bores.
Adjustable & Expansion Reamers
Mechanically adjustable tools for non-standard diameters, repair work, fitting, and controlled stock removal.
All reamer products
Explore CNC Reamer Types
Select a reamer to review its applications, features, specifications, material options, FAQs, and interactive 3D model.
- Adjustable Reamers
- Bridge Reamers
- Car Reamers
- Chamber Reamers
- Chucking Reamers
- Combination Reamers
- Expansion Reamers
- Right-Hand Spiral Reamers
- Left-Hand Spiral Reamers
- Machine Reamers
- Morse Taper Reamers
- Piloted Reamers
- Shell Reamers
- Spiral Flute Reamers
- Step Reamers
- Straight Flute Reamers
- Taper Pin Reamers
- Taper Shank Reamers
- Hand Reamers
- Tapered Reamers
Substrate and coating options
Reamer Materials Matched to the Bore Application
Aluminum & Non-Ferrous Alloys
Sharp edges, polished flute surfaces, and low-friction coating options help manage chip adhesion and built-up edge.
Stainless Steels & Superalloys
Cobalt HSS or solid-carbide substrates with application-matched coatings support dimensional control under elevated heat and cutting load.
Hardened Steels & Cast Iron
Rigid carbide geometries and prepared cutting edges help resist abrasive wear in stable machine setups.
General Steels & Mixed Production
HSS and HSS-Co options provide toughness for job-shop work, interrupted cuts, maintenance, and varied production requirements.
Custom Reamers
Application-Specific Bore Geometry & Tool Manufacturing
When a standard reamer cannot meet the drawing, bore form, reach, or tolerance requirement, Bauron can review a custom tool for the intended machine, material, and production process.
Discuss a Custom Reamer- Custom diameters, tolerance classes, flute counts, helix directions, and cutting lengths
- Piloted, stepped, tapered, chamber, and combination reamer profiles
- Application-matched carbide, HSS-Co, edge preparation, and coating options
- Manufacturing from CAD files, technical drawings, bore data, or physical samples
Technical questions
Frequently Asked Questions About CNC Reamers
How is a reamer different from a drill?
A drill creates the initial hole and removes most of the material. A reamer removes a smaller, controlled allowance from a pre-drilled hole to improve diameter, roundness, alignment, and surface finish.
When should I choose straight flutes instead of spiral flutes?
Straight flutes suit continuous bores and general-purpose work. Spiral flutes provide progressive engagement and directional chip control, making them useful for interrupted bores, keyways, cross-holes, and specific blind- or through-hole applications.
How much stock should be left for reaming?
The required allowance depends on hole diameter, workpiece material, reamer geometry, machine rigidity, and target tolerance. Excess stock can overload the tool, while too little may prevent consistent cutting; confirm the allowance for the application.
Can Bauron review a custom reamer design?
Bauron can review custom diameter, tolerance, pilot, step, taper, flute, shank, substrate, and coating requirements based on the workpiece and machining process.
Review Your Bore Requirements with Bauron
Explore the reamer catalog or submit a drawing with the bore diameter, tolerance, depth, material, machine, stock allowance, and production target.
Share the Bore, Material, and Machining Challenge
Bauron provides design and engineering support for application-specific reaming tools. Share the bore geometry, tolerance, finish target, material, machine, and coolant strategy for technical review.