Solid Carbide Internal-Coolant Machine Reamer H7 CNC Precision Reamer Steel Aluminum Alloys
Bullet Points
Coolant directly reaches the cutting edge, greatly extending service life:Internal through-coolant design delivers coolant straight to the cutting edge, cutting thermal stress and extending tool life by up to 2–3× vs. standard reamers in chip-adhesive materials.
H7/H6 accuracy guaranteed, stable hole quality: Stable H7 (custom H6) hole accuracy with IT6–IT7 class and runout ≤3μm, ensuring consistent bore quality in mass production.
Ultra-fine grain carbide substrate, wear-resistant & chipping-resistant: Ultrafine-grain solid carbide (HRA 90–94) delivers outstanding wear resistance and edge toughness, minimizing chipping on interrupted cuts.
Multi-material compatibility, multi-purpose per cutting edge: One geometry portfolio covers carbon/alloy steel, stainless steel, cast iron, aluminum, titanium and high-temp alloys — fewer tool SKUs to manage.
Applications
Aerospace:Precision reaming of turbine components and aircraft structural parts in titanium and high-temperature alloys; internal coolant enables stable deep-hole finishing in difficult-to-machine materials.
Automotive Manufacturing: High-volume finishing of dowel pin holes and oil gallery bores in engine blocks, cylinder heads and transmission housings, keeping H7 consistency at high cycle rates.
Mold & Die:Precision reaming of ejector pin, guide pin and insert holes in pre-hardened and hardened mold steels, delivering mirror-like bore finish and less post-polishing.
Hot Q&A
- What hole tolerance and surface quality can you guarantee?
Answer: Standard design targets H7 (IT7) hole tolerance; H6 available on request. Surface finish up to Ra 0.4μm with runout ≤3μm. Every reamer passes three inspections and inspection reports are available with shipment.
- Which workpiece materials can this reamer machine?
Answer: Carbon steel, alloy steel, stainless steel, cast iron, aluminum, titanium and high-temperature alloys. For chip-adhesive or difficult materials, we recommend internal-coolant + dedicated coating solutions.
- How does internal-coolant design outperform standard reamers?
Answer: Coolant flows through the tool directly to the cutting edges, reducing friction and heat, suppressing built-up edge and improving chip evacuation — yielding better bore finish and longer tool life, especially in deep holes and high-volume production.
- Do you support custom sizes? What is the MOQ?
Answer: Yes — custom diameter, tolerance, angles, flutes, coatings and step/combination reamer geometries are available per drawing. Standard sizes: MOQ as low as 10 pcs; custom items: typically 20–50 pcs depending on complexity. Please share your drawing for review.
