BB Center Drill HSS Co M35 Countersink Chamfer Lath Bit A Form 60 Degree Diameter 1 1.5 1.6 2 3.15 4 5 6 for Metal Aluminum
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Specifications
- Brand Name
- BB
- DIY Supplies
- Metalworking
- Type
- Center Drill Bit
- High-concerned chemical
- None
- Origin
- Mainland China
- Model Number
- A B
- Material
- High Speed Steel
- Use
- Metal Drilling
- is_customized
- Yes
- Tip angle
- 60° countersink angle
- Made of
- Carbide & HSS
- A
- Plain form
- B
- Bell form
Product Description
BB® Center Drill 60°
is used for producing center holes in work pieces which require machining between centers.
-Right-hand cut
1mm-3.15mm---10pcs/pack
4mm- 5mm--- 5pcs/pack
6mm---1pcs/pack
HSS suitable for center drill and chamfering in general materials. HRC＜20
1*D3.15*31
1.25*3.15*31
1.5*D4
1.6*D4*35.5
2*D5*40
2.5*D6.3*44
3*D8*50
3.15*8D*50
4*D10*56
5*D12.5*63
6*D16*90
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Pros & Cons
Pros
- HSS Co M35 for durable 60° countersink chamfering on metal/aluminum
- Multiple sizes 1-6mm for precise lathe center holes
- A plain/B bell forms for versatile metalworking DIY
- Customizable quantities from Mainland China
Cons
- HRC<20 limit, not for hardened steels without care
- Pack sizes vary, not uniform bulk
- Right-hand cut only, no left-hand options
- Requires proper speeds to avoid breakage
Common Questions
What material is the BB center drill bit made from?
High-speed steel (HSS) Co M35, also carbide options for metal drilling.
What sizes and angles are available for the countersink chamfer bits?
60° tip angle, diameters 1, 1.5, 1.6, 2, 3.15, 4, 5, 6mm; A plain or B bell form.
What materials can these center drills be used on?
For metal aluminum, general materials HRC<20, machining center holes.
How are these center drill bits used in lathes?
Right-hand cut for producing center holes in workpieces between centers.
What pack quantities and customization for shipping?
Packs vary: 10pcs for 1-3.15mm, 5pcs for 4-5mm, 1pc for 6mm; customized yes.
Product information last updated on February 8, 2026