Four-blade reamer / Six-flute straight-groove reamer
The SR550 Series Slim-Shaft Through-Hole Reamers are industry-leading products developed by JIAYI Tools specifically for through-hole machining applications involving long overhangs and small holes. They feature a unique "slim-shaft vibration-damping structure + bidirectional finishing edge" design, In the machining of through holes with long overhangs and small diameters, we have achieved a breakthrough characterized by "zero tool vibration, zero chipping, and high surface finish," completely resolving the pain points associated with traditional fine-shank reamers—such as tool vibration, chipping at the exit, and poor accuracy— It provides disruptive micropore processing solutions for the aerospace, electronics, and medical device industries.
| Part number | SR550 Series |
|---|---|
| Type | Carbide Reamers |
| Product name | Six-Flute Deep-Hole Reamers/Through-Hole Reamers |
| Coating | Nano TiAlN |
| OEM / ODM | Made to your samples or drawings |
| Origin | Shenzhen, China |
Design details that keep reaming stable, accurate and chatter-free.
The front cutting edge features a 15° guide angle to reduce inlet compression deformation; the rear cutting edge features a 0.002 mm mirror-finish edge, ensuring no chipping or burrs at the exit and a consistent hole wall surface roughness of Ra ≤ 0.15 μm.
The tool body is machined from a single piece of ultra-fine-grain solid carbide (HRC 68) with no welded joints, ensuring no loosening or runout during high-speed, high-feed machining, with a repeatability of ≤0.003 mm.
Utilizing PVD nano-coating technology, the coating is only 2 μm thick, with a hardness as high as HV3800 and a coefficient of friction as low as 0.3, resulting in a tool life twice that of traditional coatings.
Features a 6-flute variable-pitch structure that disrupts cutting vibration frequencies, completely eliminating chatter marks; the flutes feature a 0.003 mm inverted-cone design to reduce friction with the bore wall, further improving bore wall finish
Features three built-in helical internal cooling channels capable of delivering cooling pressures up to 120 bar. Combined with a large-capacity chip-carrying groove design, this increases chip evacuation speed by 50%, preventing chips from scratching the bore wall.
The front edge features a 15° guide angle to reduce entry-point deformation; the rear edge features a 0.002 mm mirror-finish edge to ensure no chipping or burrs at the exit, consistently achieving a hole wall surface roughness of Ra ≤ 0.15 μm.
The front angle features a 5°–8° adaptive design that automatically optimizes cutting force when machining different materials, reducing tool wear and improving machining stability.
Each reamer passes G2.5-grade dynamic balance testing, ensuring vibration-free operation at high speeds of 20,000 rpm and guaranteeing machining stability.
Starting values. Our engineers can tune parameters to your machine and workpiece.
| Workpiece material | Cutting speed vc (m/min) | Feed f (mm/rev) | Coolant |
|---|---|---|---|
| Aluminum Alloy | 80–120 | 0.05–0.15 | MQL |
| Stainless Steel | 30–60 | 0.03–0.08 | Internal + MQL |
| Steel | 40–70 | 0.04–0.1 | Emulsion |
Typical bores and industries for this reamer.
Machining φ1–φ6 mm micro-holes in titanium alloy or stainless steel substrates for aircraft engine blades and sensors, with a depth-to-diameter ratio of up to 10:1 and roundness ≤ 0.002 mm.
Machining φ0.5–φ3 mm mounting holes in aluminum alloy substrates for smartphone camera modules and connectors to meet the assembly requirements of precision electronic components.
Machining φ0.8–φ5 mm through-holes in stainless steel substrates for orthopedic implants and surgical instruments to ensure the precision and biocompatibility of medical devices.
Machining φ2–φ8 mm ejector pin holes on the base plates of injection molds and stamping dies to ensure high-precision fit of the ejector pins, with repeatable positioning accuracy ≤ 0.005 mm.
Send your bore size, tolerance and drawing. We manufacture standard sizes and custom reamers made to your samples or drawings.