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Double Cut Solid Carbide Burr Bits for Locksmiths
Fine double-cut burr bits sized for lock work – small heads, controlled bite, chamber-safe cutting.
Design and Construction — a VPOINT tungsten carbide burr bit in the standard SA–SM head-code system, sized for steel / stainless welds and similar work. YG8 carbide at HRA 89–91; die-grinder reference speeds are in the performance table below, with the flute-style guidance in the FAQ. ISO 9001 production, batch-verified, custom sizes from drawings.
Design and Construction
Locksmith-spec double-cut burr bits: small heads (3-6 mm) with fine crossed flutes on slim shanks. The fine double cut takes a small, controlled bite – essential when the workpiece is a cylinder you must not distort.
How It Works
Fine crossed flutes shear small chips at high RPM; light pressure plus the small head keeps heat and distortion away from the cylinder.
Applications
Locksmith service, keyway repair, pin-chamber cleanup, small-lock maintenance.
Field Cases
- Lock service: pin chambers cleaned without ovalising the bore.
- Key cutter: warded keyway burrs dressed to spec.
- Trade school: fine double cut taught as the controlled-entry default.
Performance Data
| Metric | Value / Observation |
|---|---|
| Head sizes | 3-6 mm locksmith class |
| Speed range | 30,000-50,000 RPM (small heads run fast) |
| Bite control | Fine double cut = small chips, low grab |
| Hardness | 1,300-1,500 HV |
Suitable Materials
Brass, zinc, steel lock components.
Material Comparison: Fine Double Cut vs Standard Double Cut on Lock Parts
Why the fine pattern matters on brass and zinc:
| Factor | Fine Double Cut (this bit) | Standard Double Cut |
|---|---|---|
| Tooth pitch | Fine – more points engaged | Coarse – fewer, deeper bites |
| Bite per pass | Light, controllable | Heavier – can pull the tool |
| Brass behaviour | Clean shear | Grab and chatter risk |
| Chamber walls | Undistorted | Ovalising risk at edges |
| Finish | Fine as-cast | Needs blending after |
Delivery Scope
Bits in protective tubes; custom head profiles per order.
Why Choose VPOINT
Small heads with fine flutes ground specifically for lock dimensions.
Precision & Quality Control
Small heads magnification-inspected; runout checked at the nose.
Specifications
Locksmith range:
| Item | Specification |
|---|---|
| Head sizes | 3-6 mm |
| Shank | 3 mm class |
| Cut type | Fine double cut |
| Head material | Solid YG carbide |
Frequently Asked Questions
Which head code do I need?
＋The SA–SM code defines the contour: SA cylinder, SC ball-nose end, SD ball, SF tree-pointed, SH tree-radius, SL tree-tapered, SM cone. Match the contour to the cavity or corner you are shaping.
Can I use one burr across different metals?
＋Yes with the right flute style — double-cut for steel and iron, Aluma-cut for aluminium and soft non-ferrous. Swapping styles between jobs keeps edges clean.
Are custom shanks or head sizes available?
＋Yes — non-standard head diameters, shank sizes and logo marking are produced to order from drawings.
Why fine double cut for locks?
Small heads need a small bite – the fine pattern controls it.
Brass safe?
Yes – clean shear without grab.
Custom profiles?
Yes, ground to your lock type.
Speed?
30,000-50,000 RPM – small heads like high RPM.
Steel locks too?
Yes, with reduced pressure.
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Sources & standards: ISO 9001 quality management · UNSPSC commodity codes · eClass product classification
