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1/4 Shank Carving Cutting Grinding Drillling Polishing Tool, 12 mm Double Cut Burr (70 mm)
A 12 mm double-cut cylinder burr, 25 mm cut length on a 70 mm long 1/4 inch shank – the heavy-removal bench standard.
Design and Construction
A 12 mm cylinder double-cut head with 25 mm of cut length on a 70 mm long 6 mm shank. The long shank plus large head clears collars and reaches into work while moving serious material – up to a few cm³ per minute in mild steel.
How It Works
Run at about 15,000-25,000 RPM, the wide cylinder planes flat areas fast and the long shank reaches over clamps and into pockets.
Applications
Heavy weld dressing, plate-edge preparation, foundry fettling, fabrication rework.
Field Cases
- Plate shop: flattens a 150 mm weld run on 20 mm plate in under a minute.
- Foundry: fettles feed pads on grey-iron castings where grinding discs glaze.
- Fabrication rework: reaches a seam 80 mm inside a box-section through the end hole.
Performance Data
| Metric | Value / Observation |
|---|---|
| Cut diameter | 12 mm |
| Cut length | 25 mm |
| Over length | 70 mm |
| Removal rate | Several cm³/min in mild steel (typical bench data) |
Suitable Materials
Cast iron, steel, stainless steel and non-ferrous metals.
Material Comparison: Removal Rate by Head Diameter
What the bigger head buys – typical industry data for a 6 mm shank:
| Metric | 12 mm (this burr) | 8 mm | 6 mm |
|---|---|---|---|
| Head diameter | 12 mm | 8 mm | 6 mm |
| Max safe speed | About 35,000 RPM | About 55,000 RPM | About 65,000 RPM |
| Recommended start in steel | About 20,000-25,000 RPM | About 30,000 RPM | About 50,000 RPM |
| Removal per pass | Highest – widest contact | Medium | Light |
| Torque demand | Highest – stiffer tool preferred | Medium | Low |
Delivery Scope
Burr in plastic case; production packing available.
Why Choose VPOINT
Large head plus long reach in one tool removes the need for a separate extension setup.
Precision & Quality Control
Large heads are dynamically checked for balance and runout at working speed.
Specifications
Standard specifications:
| Item | Specification |
|---|---|
| Cut diameter | 12 mm (0.47 inch) |
| Cut length | 25 mm |
| Over length | 70 mm |
| Shank | 6.35 mm (1/4 inch) |
Frequently Asked Questions
Is 70 mm the total length?
Yes, overall length including the 12 mm head.
What speed for the 12 mm head?
About 15,000-25,000 RPM.
Can it run in a drill press?
Yes, for held workpieces; keep the speed low.
Which cut type?
Double cut for fastest removal.
Left-hand version?
Available on request.
Related Search Terms
F type ball nose burr, long shank ball burr, 100mm carbide burr, deep cavity burr, impeller repair burr, weld root dressing tool, weld dressing rotary burr, fabrication deburring tool, steel shaping burr, metal carving bits, maintenance rotary files, grinder attachment burrs, cnc deburring tool, machine shop burrs, industrial carbide burrs, tool steel grinding
