Solid Carbide Spiral Flute Machine Reamer H7 CNC Reamer TiAlN Coated for Steels & Cast Iron

Short Description:

This Spiral Flute Solid Carbide Machine Reamer is a precision reaming tool engineered for high-accuracy hole finishing on CNC machining centers, drilling machines and lathes.

Made from micro-grain solid carbide (tungsten steel) with ISO K10/K20 grade substrate, it delivers stable H7-class hole tolerance, excellent surface finish and long service life when reaming steel, cast iron, aluminum alloys and other metals.

Material: Micro-grain solid carbide (tungsten steel)
Workpiece Materials: Carbon steel, alloy steel, cast iron, stainless steel, aluminum alloys, non-ferrous metals
Surface Finish: Ra ≤ 0.4 μm （ down to Ra 0.2 μm ）
Hardness: 91.5 – 92.5 HRA （ HV ≥ 1800 ）

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Product Detail

Product Tags

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Bullet Points

Precision Reaming：Achieves stable H7-class hole tolerance with smooth, consistent reaming in one pass.
Chip Evacuation：Spiral flutes carry chips out continuously, preventing clogging and heat buildup — ideal for blind holes.
Blind & Through Holes：Right-hand helix with right-hand cut for blind holes; left-hand helix with right-hand cut for through holes.
Machine Compatibility：Compatible with CNC machining centers, drilling machines and lathes.
Coating Options：TiAlN/TiN coatings improve surface finish, extend tool life and lower overall machining cost.

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Applications

Automotive Manufacturing：Precision reaming of engine bores, cylinder blocks/heads, gearbox and transmission housings to guarantee assembly tolerance and sealing.
Aerospace Industry：Hole finishing on aircraft aluminum structural parts and critical fastening holes where tight tolerances are mandatory.
Mold & Die Making：Efficient reaming of ejector pin holes, guide pin holes and insert holes in mold steel for longer mold life.
Hydraulics & Precision Parts：Precision reaming of valve bodies, pump housings and cylinder bores requiring roundness and low roughness.
General Metalworking & CNC Job Shops：Batch reaming of structural parts, flanges and sleeves for higher line efficiency and yield.

Hot Q&A

Do you support custom orders?

Answer: Yes. Please provide the hole tolerance, surface finish requirement and drawing; diameter, tolerance band, helix angle, coating and shank can all be customized.

Does it work for both blind and through holes?

Answer: Yes. Right-hand helix with right-hand cut is recommended for blind holes, left-hand helix with right-hand cut for through holes; please specify the hole type when ordering.

What tolerance and surface finish can I expect?

Answer: IT6–IT7 (standard H7) reaming tolerance and Ra 0.2–0.4 μm surface finish, depending on workpiece material and cutting parameters.

How do you guarantee quality?

Answer: Every batch passes online production inspection, technical sampling audit and final full inspection; non-human quality defects are covered by replacement within the warranty period, and machining technical support is provided.