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Zhuzhou TGC Cemented Carbide Co.,Ltd.
Zhuzhou TGC Cemented Carbide Co.,Ltd. Specialized in production of all kinds of tungsten carbide rods
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Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

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Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

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Brand Name : OUQI

Model Number : Endmills blanks

Certification : ISO9001:2008 ISO14001:2004

Place of Origin : China

MOQ : 10pc

Price : negotiable

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability : 5000kgs per month

Delivery Time : Standard products in one week

Packaging Details : plastic box/box + Cartons

Material : 8% Cobalt

ISO Grade : K20-k30

Diameter : 3mm

Leght : 40mm

Tolerance : h6/h5

Surface Roughness : Ra 0.2

Circularity : 0.02

straightness : 0.02

Density : 14.56

Hardness HV30 : 1900

T.R.S : 4000

Grain size : -

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Small PCB drills cemented carbide milling blanks with 8% Cobalt as the binder

Outer diameter: 3mm

Length: 40mm or as per required

Roughness: Ra 0.2 or Ra 0.05

Chamfer one side: 0.5*45°

Grade Density T.R.S Hardness Properties & Applications
g/cm3 N/mm2 HV30
YU08 14.56 4000 1900 Suitable for manufacturing micro-drills with a diameter less than 0.8mm for machining PCB. It is also suitable for manufacturing various kinds of solid cemented carbide tools for machining glass fiber, wood, plastics, paper and brass, Al alloy etc.

Regular size for small drills:

Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

Diameter mm Length mm Diameter mm Length mm
D Tolerance L Tolerance D Tolerance L Tolerance
1.60 +0/-0.006 20 0/+0.5 10.00 +0/-0.009 50 0/+0.5
2.35 30 0/+0.5 10.00 70 0/+0.5
2.35 45 0/+0.5 10.00 72 0/+0.5
3.00 60 0/+0.5 10.00 75 0/+0.5
4.00 +0/-0.008 40 0/+0.5 10.00 80 0/+0.5
4.00 46 0/+0.5 10.00 90 0/+0.5
4.00 50 0/+0.5 10.00 100 0/+0.5
4.00 60 0/+0.5 12.00 +0/-0.011 70 0/+0.5
4.00 75 0/+0.5 12.00 79 0/+0.5
4.00 100 0/+0.5 12.00 83 0/+0.5
5.00 50 0/+0.5 12.00 100 0/+0.5
5.00 60 0/+0.5 12.00 120 0/+0.5
5.00 100 0/+0.5 13.00 100 0/+0.5
6.00 40 0/+0.5 14.00 75 0/+0.5
6.00 50 0/+0.5 14.00 80 0/+0.5
6.00 58 0/+0.5 14.00 83 0/+0.5
6.00 60 0/+0.5 14.00 100 0/+0.5
6.00 67 0/+0.5 16.00 80 0/+0.5
6.00 75 0/+0.5 16.00 90 0/+0.5
6 100 0/+0.5 20.00 +0/-0.013 100 0/+0.5
8 +0/-0.009 50 0/+0.5
8 60 0/+0.5
8 63 0/+0.5
8 75 0/+0.5
8 90 0/+0.5
8 100 0/+0.5

General Tolerance for ground carbide rods

General tolerance for the h6 finished ground solid carbide rods
Diameter Tolerance μm Length Tolerance Straightness Tolerance Circularity Tolerances
＜3.0 -6/0 ＜100.0 +0.5/+1.0 ＜4.0 0.07 <3,0 2,0 micron
3.0-6.0 -8/0 100.0-165.0 +1.0/+2.5 4.5-5.0 0.06 3,0- 6,0 2,5 micron
6.0-1.0 -9/0 165.0-335.0 +1.0/+6.0 5.5-12 0.05 6,1-10,0 3,0 micron
10.0-18.0 -11/0 ＞12.5 0.04 10,1-18,0 3,5 micron
18.0-30.0 -13/0 18,1- 30,0 4,0 micron
30.0-50.0 -16/0 30,1- 50,0 5,0 micron

General tolerance for the h5 finished ground solid carbide rods
Diameter Tolerance μm Length Tolerance Straightness Tolerance Circularity Tolerances
＜3.0 -4/0 ＜100.0 +0.5/+1.0 ＜4.0 0.07 <3,0 2,0 micron
3.0-6.0 -5/0 100.0-165.0 +1.0/+2.5 4.5-5.0 0.06 3,0- 6,0 2,5 micron
6.0-1.0 -6/0 165.0-335.0 +1.0/+6.0 5.5-12 0.05 6,1-10,0 3,0 micron
10.0-18.0 -8/0 ＞12.5 0.04 10,1-18,0 3,5 micron
18.0-30.0 -9/0 18,1- 30,0 4,0 micron
30.0-50.0 -11/0 30,1- 50,0 5,0 micron

Our tungsten carbide rods:

  • 100% virgin material, no recycled material
  • Spray drying tower and HIP sintering furnace
  • Constant excellent quality
  • Large stock for all sizes, the regular products can be shipped in 3 days, and the special rods can be ground in one week.
  • 100% inspected before delivery. The inspection including raw material and dimension report will be sent you before delivery
  • Excellent grinding quality, Straightless and circularity could be 0.05 or 0.02.

Carbide grades

Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

What we can provide

Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt

Small Cemented Carbide Milling Blanks PCB Drill Bits 8% Cobalt


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