High Speed Cobalt Steel Weld Cutter Spot Drill Bit Weld Removal Tool, HSS M42 Bit Spotting Drills with 90 Degree Angle, 120° HSS-COBALT SPOT DRILL SET 6, 8, 10, 12mm, Nc Spot Drill Hss Carbide Stub Center Bits 60 90 120 Degree, SPOTTING DRILL SET 90DEG HSS-COBALT TiNite Round Shank 90 Degree Drilling Tool, Spot Drill HSS Co Cobalt NC Center Bit 60 90 120 Degree, Carbide Spot Drill NC Spotting Drill Set, Woodworking Metalworking & Multipurpose Drill Bits China Supplier Factory
High Speed Cobalt Steel Weld Cutter Spot Drill Bit Weld Removal Tool Specifications
Material Cobalt Steel
Cutting Diameter 8 Millimeters
Finish Type Black Oxide
Shank Type Straight
ADVANCED M35 COBALT HSS WITH MULTI-LAYER COATING Our spot weld drill bit set is forged from professional-grade M35 high-speed steel (HSS) with 5% cobalt content. The upgraded industrial coating combines a TiAlN base layer plus an outer black aluminum nitride (AlNi) layer – significantly boosting surface hardness, reducing friction heat, and extending bit life even when drilling repeatedly into high-strength automotive steel.
VERSATILE FOR AUTO BODY & METAL REPAIR Works effectively on a wide range of materials including car body steel, aluminum panels, and other common metals. Ideal for collision repair, panel replacement, rust repair on floor pans, quarter panels, rocker panels, and general automotive sheet metal spot weld removal. One tool for professional mechanics and serious DIYers.
PRECISE APPLICATION FOR MULTIPLE REPAIR SCENARIOS Engineered for A‑pillar solder joint removal, mechanical plate positioning drilling, general spot weld cutting, and automotive sheet metal weld removal. The sharp spur point and spring-loaded centering tip prevent bit walking, delivering clean cuts without burrs or damaging the second panel – no need for secondary weld cleanup.
FAST & EFFICIENT WITH PLATE PROTECTION Removes spot welds quickly without twisting or distorting metal plates. The unique flute design clears chips efficiently, reduces heat buildup, and saves you significant time and effort during car repair, frame straightening, or rust restoration projects.
COMPLETE 5‑PIECE 5/16″ KIT WITH ETCHED SIZES Includes 5 pieces of 5/16 inch (8mm) cobalt spot weld drill bits, Each bit features permanently etched size markings for easy identification, so you can grab the right bit instantly during your repair project.
HSS-Co5 (Cobalt) Spot Weld Drill.
These drills are designed for removing spot welds and are especially useful for vehicle body repairs.
The drills are designed to cut through existing spot welds, releasing damaged panels and enabling replacements to be fitted with minimum fuss.
The HSS-Co5 material ensures a long bit life.
Spotting drill bits are used to start and precisely identify holes. They make a shallow hole that prevents drill bits from wandering or moving when they begin to drill.
Drilling a precise hole may be difficult. Material behaviour, surface imperfections, and drill tip geometry are all elements that might contribute to incorrect holes. A Spot Drill eliminates the possibility of drill wandering and contributes to a more precise result.
What Exactly Is Spot Drill?
A spot drill has a small flute length and a precise tolerance point geometry.
It is critical to understand that a spot drill has no land or body relief and is NOT intended to drill beyond the depth of the point angle, which is adequate to drill a detent or “dimple” in the workpiece.
Spot drills are used to increase the precision of secondary drill operations. However, if the spot drill diameter is more significant than the final hole size, they can also be used as a chamfering tool.
Ideally, the spot drill diameter should be around 70% of the ultimate drill diameter. The point angle of the spot drill should be more than or less than the point angle of the final drill. Solid Tungsten Carbide TiAlN Coated Spot Weld Drill Bit
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SIZE
|
Diameter
|
Total Length
|
Flute Length
|
Cutting Angle
|
|
3.0
|
3
|
46
|
12
|
60° / 90° / 120°
|
|
4.0
|
4
|
55
|
14
|
60° / 90° / 120°
|
|
5.0
|
5
|
62
|
16
|
60° / 90° / 120°
|
|
6.0
|
6
|
66
|
18
|
60° / 90° / 120°
|
|
7.0
|
7
|
70
|
20
|
60° / 90° / 120°
|
|
8.0
|
8
|
79
|
22
|
60° / 90° / 120°
|
|
9.0
|
9
|
84
|
24
|
60° / 90° / 120°
|
|
10.0
|
10
|
89
|
26
|
60° / 90° / 120°
|
|
11.0
|
11
|
95
|
28
|
60° / 90° / 120°
|
|
12.0
|
12
|
102
|
30
|
60° / 90° / 120°
|
|
13.0
|
13
|
102
|
32
|
60° / 90° / 120°
|
