8% Cobalt HSS M42 Swan Neck Spot Weld Drill Bit, 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
8% Cobalt HSS M42 Swan Neck Spot Weld Drill Bit Specifications
Shank Form Flat
Material High Speed Steel Cobalt (HSSE Co8%)
Type Spot Weld Drill Bit
Size 8 mm
System of Measurement Metric
Finish Bright
Centre nib enables accurate positioning and less drilling pressure without work hardening
Shallow point design cuts through top panel while only slightly marking second panel
38mm short rigid drill designed for use with spot weld pneumatic disconnectors
Flatted shanks with 60° taper for good location in the disconnector
Made from HSS Co. The 8% cobalt formula improves abrasive & heat resistance, for increased strength at higher cutting temperatures
Applications
General workshop and trade drilling
Metal, plastic and timber
Fitters, fabricators and maintenance
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.
In hardened steel, spot drilling is not suggested.
Contacting the corners of the carbide drill before the middle point in the hole opening may result in corner chipping.
Using a spot drill with an angle less than the drill tip angle WILL result in “blown off” drill flutes. HSS-Co5 (Cobalt) Titanium Aluminium Nitride Coated (TiAlN) Spotting Drill
Spot drill bits start and detect holes. They make a small hole that keeps drill bits from wandering. A Spot Drill prevents drill straying and improves precision when used appropriately. Spotting drills make a tiny divot mark the drill’s centre before plunging. Some machinists use them to chamfer drilled holes. When utilizing a carbide or screw machine drill, spotting is optional. When utilizing a carbide or screw machine drill, spotting is optional. Investing in screw machine-length twist drills is wise. Two-part centre drills create a hole for a lathe’s centre. Spot drills and twist drills need a drill chuck or collet chuck. Three areas grasp the drill chuck. A collet distributes strain 360 degrees around the shank, reducing grip. Flat head cap screws can be spot-drilled and counterbored. You’ll need a drill with the screw’s head diameter. Spot drills cost double a countersink. HSS-COBALT TiN Plating 90° Spotting Drill Bit DIN1897
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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°
|
