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Tungsten Carbide Mirco PCB Drill bit

Name: Tungsten Carbide Mirco PCB Drill bit
Brand: Welltronics Technology Limited
Rating: 4.9 (15 reviews)

$0.18 ~ $2.00 / Piece/Pieces

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Basic Info

Model No.	well-drill01
Brand Name	Welltronics
Diameter	3.175mm
Overall Length	38mm
Material	Carbide
Suitable for	PCB FR4 drilling
Flute length	7.5-10.5mm
Flute diameter	0.2-6.5mm
Packing	50pcs/box
MOQ	50PCS
Delivery time	0-7days

Product description

PCB drill bits are precision tools used to drill holes on printed circuit boards (PCBs) in electronic manufacturing. They are usually made of superhard materials such as tungsten steel (hard alloy) or tungsten carbide. They are designed to meet the requirements of high hardness, high wear resistance, and low thermal expansion coefficient to meet the challenges of high speed (usually ≥100,000 rpm), small aperture (minimum 0.05mm), and complex materials (such as FR-4, high-frequency ceramic substrates) in PCB processing.

Key features:

Material: tungsten steel (WC-Co alloy) or tungsten carbide (WC matrix + Co/Ni binder), hardness up to HRA 92-94;

Structure: straight shank, stepped or coated, blade diameter accuracy within ±0.005mm;

Coating technology: TiAlN, DLC (diamond-like carbon), etc., to improve wear resistance and high temperature resistance

Name	Drill bit, PCB drill bit,PCB drill
Material	Tungsten carbide
Ovenrall length	38.1mm±0.1mm
Diameter	3.175mm
Flute length	4.3-10.5mm(depends on flute dia)
Flute dia	0.2-6.5mm
Packing	50pcs/box, 40box/carton
MOQ	50PCS

PCB drill bit Advantage:

1、 Large chip removal space: small chip removal resistance, smooth chip removal, small drilling heat, reduce drilling pollution;

2、 Extraordinary cutting edge sharpness: due to the use of nanotechnology and advanced grinding technology, the cutting edge of the drill is sharper than before, which can reduce the cutting force and improve the processing efficiency.

3、 Tool design based on customer application: rich variety of drill bits can meet different application needs

Q: When processing high-frequency materials (such as Rogers 4350B), which one is more suitable for micro-holes below 0.1mm, tungsten steel drill or tungsten carbide drill?

Tungsten steel drill:

Advantages: High toughness (strong impact resistance), suitable for processing hard plates filled with glass fiber or ceramics;

Limitations: Fast hardness decay at high temperatures, and the hole diameter is easy to expand during continuous processing (such as a 0.1mm hole may expand to 0.105mm).

Tungsten carbide drill:

Advantages: Higher hardness (HRA 93-94), wear resistance increased by more than 30%, suitable for low-loss drilling of high-frequency materials;

Limitations: Large brittleness, requires a high-precision spindle (radial runout ≤3μm) to avoid chipping.