DRILLSTAR CARBIDE TOOLS ARE WORKING IN MANY PLACES AROUND THE WORLD
Carbide Reamers are high-precision cutting tools designed to finish pre-drilled or bored holes with exceptional dimensional accuracy and surface finish, leveraging the superior hardness and wear resistance of tungsten carbide (WC-Co) composites. These reamers are engineered to expand hole diameters by 0.1–2mm while correcting minor deviations in roundness, straightness, and surface roughness, making them indispensable for achieving tight tolerances (H7–H9) in challenging materials such as hardened steel (up to 55 HRC), titanium, and cast iron.
Available in both standard and custom configurations—including straight, tapered, and fluted designs—Carbide Reamers feature precision-ground cutting edges and optional coatings to optimize performance across diverse machining applications. Their ability to maintain consistent hole quality in high-volume production and complex geometries sets them apart from high-speed steel (HSS) reamers, especially in demanding industrial environments.
Superior Material Performance:
Manufactured from submicron carbide (0.8–1.2μm grain size) with 8–12% cobalt binder, offering hardness up to 92 HRA and resistance to micro-chipping during interrupted cuts.
PVD coatings (TiN, TiCN, AlCrN) reduce friction by 25% and extend tool life by 30% in abrasive materials like fiberglass-reinforced plastics.
Precision Geometry Design:
Helical flutes (15°–30° helix angle) for smooth chip evacuation in through-holes, while straight flutes excel in blind-hole applications.
Back-tapered shanks (0.005–0.01mm/mm) minimize friction with the bore wall, reducing torque and heat generation during deep-hole reaming.
Dimensional Accuracy:
Ground to ISO h5/h6 tolerances (±0.001–0.003mm) for the cutting diameter, ensuring hole sizes within H7 tolerance (e.g., 50mm hole ±0.03mm).
Laser-scribed diameter markings for quick identification and tool setup in CNC machines.
Versatile Applications:
Available in diameters 3–150mm and lengths up to 1,500mm, with options for coolant-through designs to enhance chip removal in deep holes (≥20x D).
Chamfered or radiused leading edges to facilitate entry into pre-drilled holes and prevent edge chipping.
Quality Assurance:
100% inspection via coordinate measuring machines (CMM) for diameter, straightness, and flute spacing, compliant with ASME B94.21 and ISO 3685 standards.
Automotive Engine Machining: Finishing cylinder head bolt holes (cast iron) and transmission shaft bores (aluminum alloys) to H7 tolerance, ensuring precise fit for press-fit components.
Aerospace Structure Assembly: Reaming titanium alloy wing root holes for fastener installation, where hole straightness (≤0.05mm/m) and surface finish (Ra ≤0.8μm) are critical for load transfer.
Mold & Die Making: Precision reaming of ejector pin holes in hardened tool steel (52 HRC), enabling smooth ejection of plastic parts and reducing mold wear.
Medical Device Production: Finishing holes in cobalt-chromium orthopedic implants for press-fit interfaces, requiring dimensional accuracy within ±5μm and ultra-smooth surfaces (Ra ≤0.4μm).
Q: When should I use a carbide reamer instead of an HSS reamer?
A: Choose carbide for materials harder than 30 HRC, abrasive composites, or when higher precision/surface finish is needed. HSS is suitable for softer steels and lower-volume applications.
Q: Can these reamers be used for through-hole and blind-hole reaming?
A: Yes, helical flute reamers are ideal for through-holes (chip evacuation), while straight flute or stub reamers work best for blind holes (reduced flute length to prevent chip trapping).
Q: How do I prevent reamer breakage in deep holes?
A: Use appropriate coolant (synthetic for steel, oil-based for aluminum), maintain feed rates within 0.05–0.2mm/rev, and ensure the reamer is properly aligned with the hole axis using a guide bushing.
Q: Do you offer reamers with left-hand flutes for special applications?
A: Yes, custom reamers with left-hand flutes, variable pitch, or special coatings can be engineered for unique machining requirements—contact our technical team for design support.
Extremely unequal flute spacing means that the divide is not the same for each tooth. As there are no teeth diametrically opposite each other, the reamer produces a hole with improved hole roundness variance.
Internal coolant nozzles (axial for straight flute and lateral for spiral flute) deliver coolant directly to the cutting zone, resulting in longer tool life and good chip evacuation.
For all industry segments e.g. general machining, die and mould, automotive, energy and power generation.
Diameter range: 3.97–20 mm (0.156–0.787 inch)
Straight flute and spiral flute
Cylindrical shank
Internal coolant
Carbide grade AU10 (TiAlN)
Hole tolerance H7
1. Cylindrical type straight flute solid carbide reamers
2. Cylindrical type spiral flutes solid carbide reamers
3. Morse type straight flutes solid carbide reamers
4. Morse type spiral flutes solid carbide reamers
Carbide Reamers are high-precision cutting tools designed to finish pre-drilled or bored holes with exceptional dimensional accuracy and surface finish, leveraging the superior hardness and wear resistance of tungsten carbide (WC-Co) composites. These reamers are engineered to expand hole diameters by 0.1–2mm while correcting minor deviations in roundness, straightness, and surface roughness, making them indispensable for achieving tight tolerances (H7–H9) in challenging materials such as hardened steel (up to 55 HRC), titanium, and cast iron.
Available in both standard and custom configurations—including straight, tapered, and fluted designs—Carbide Reamers feature precision-ground cutting edges and optional coatings to optimize performance across diverse machining applications. Their ability to maintain consistent hole quality in high-volume production and complex geometries sets them apart from high-speed steel (HSS) reamers, especially in demanding industrial environments.
Superior Material Performance:
Manufactured from submicron carbide (0.8–1.2μm grain size) with 8–12% cobalt binder, offering hardness up to 92 HRA and resistance to micro-chipping during interrupted cuts.
PVD coatings (TiN, TiCN, AlCrN) reduce friction by 25% and extend tool life by 30% in abrasive materials like fiberglass-reinforced plastics.
Precision Geometry Design:
Helical flutes (15°–30° helix angle) for smooth chip evacuation in through-holes, while straight flutes excel in blind-hole applications.
Back-tapered shanks (0.005–0.01mm/mm) minimize friction with the bore wall, reducing torque and heat generation during deep-hole reaming.
Dimensional Accuracy:
Ground to ISO h5/h6 tolerances (±0.001–0.003mm) for the cutting diameter, ensuring hole sizes within H7 tolerance (e.g., 50mm hole ±0.03mm).
Laser-scribed diameter markings for quick identification and tool setup in CNC machines.
Versatile Applications:
Available in diameters 3–150mm and lengths up to 1,500mm, with options for coolant-through designs to enhance chip removal in deep holes (≥20x D).
Chamfered or radiused leading edges to facilitate entry into pre-drilled holes and prevent edge chipping.
Quality Assurance:
100% inspection via coordinate measuring machines (CMM) for diameter, straightness, and flute spacing, compliant with ASME B94.21 and ISO 3685 standards.
Automotive Engine Machining: Finishing cylinder head bolt holes (cast iron) and transmission shaft bores (aluminum alloys) to H7 tolerance, ensuring precise fit for press-fit components.
Aerospace Structure Assembly: Reaming titanium alloy wing root holes for fastener installation, where hole straightness (≤0.05mm/m) and surface finish (Ra ≤0.8μm) are critical for load transfer.
Mold & Die Making: Precision reaming of ejector pin holes in hardened tool steel (52 HRC), enabling smooth ejection of plastic parts and reducing mold wear.
Medical Device Production: Finishing holes in cobalt-chromium orthopedic implants for press-fit interfaces, requiring dimensional accuracy within ±5μm and ultra-smooth surfaces (Ra ≤0.4μm).
Q: When should I use a carbide reamer instead of an HSS reamer?
A: Choose carbide for materials harder than 30 HRC, abrasive composites, or when higher precision/surface finish is needed. HSS is suitable for softer steels and lower-volume applications.
Q: Can these reamers be used for through-hole and blind-hole reaming?
A: Yes, helical flute reamers are ideal for through-holes (chip evacuation), while straight flute or stub reamers work best for blind holes (reduced flute length to prevent chip trapping).
Q: How do I prevent reamer breakage in deep holes?
A: Use appropriate coolant (synthetic for steel, oil-based for aluminum), maintain feed rates within 0.05–0.2mm/rev, and ensure the reamer is properly aligned with the hole axis using a guide bushing.
Q: Do you offer reamers with left-hand flutes for special applications?
A: Yes, custom reamers with left-hand flutes, variable pitch, or special coatings can be engineered for unique machining requirements—contact our technical team for design support.
Extremely unequal flute spacing means that the divide is not the same for each tooth. As there are no teeth diametrically opposite each other, the reamer produces a hole with improved hole roundness variance.
Internal coolant nozzles (axial for straight flute and lateral for spiral flute) deliver coolant directly to the cutting zone, resulting in longer tool life and good chip evacuation.
For all industry segments e.g. general machining, die and mould, automotive, energy and power generation.
Diameter range: 3.97–20 mm (0.156–0.787 inch)
Straight flute and spiral flute
Cylindrical shank
Internal coolant
Carbide grade AU10 (TiAlN)
Hole tolerance H7
1. Cylindrical type straight flute solid carbide reamers
2. Cylindrical type spiral flutes solid carbide reamers
3. Morse type straight flutes solid carbide reamers
4. Morse type spiral flutes solid carbide reamers
