5 piece step drill bits set replaces 50 individual drill bits which saves you a lot of trouble and space,Two-flute design gives you faster, smoother cutting. Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck
1. This is a new type of HSS 4241 steel large step taper drill cobalt coated to reduce friction and run cooler
2. Cobalt steel with titanium coating ensures the bits have exceptional durability and will stay sharp for many years.
3. It is very suitable for cutting holes in various materials, including carbon steel, brass, wood, plastic, etc.
4.The bits come supplied in an organized aluminum case for easy storage and transport.
5This set is a must-have for HVAC professionals and DIY enthusiasts.
6.Aluminum Box Package Size: 15cm * 10.5cm * 4.2cm (L * W * H)
This is a set of step drills made of high speed steel 4241. Different specifications can meet different drilling requirements.
Note:
1. Hand drill (above 550W), thickness 1-2mm, hole diameter greater than 14mm, requires bench drill operation. (It is recommended to drill a workpiece with a stainless steel hardness of 25° or less)
2. When drilling operation, water injection and cooling while drilling, effectively extend the service life of the drill. (Recommended speed 250-400)
Features:
Made of fine quality high speed steel, wear resistant, not easy to rust, has a long service life.
Double groove design for faster and smoother cutting.
Different specifications can meet different drilling requirements.
Suitable for workpiece with hardness is less than 25°, such as carbon steel, iron plate, aluminum plate, pvc plate, wood board and so on.
Shank Type: Triangle
Cooling Type (internal/outer cooling): water injection cooling
Material: high speed steel 4241
Category: Reaming drill
Shank Diameter: 6 (mm)
Series: Imperial step drill
Size:
1/4″ to 1-3/8″ (10 steps): 1/4″, 3/8″ 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″
3/16″ to 7/8″ (12 steps): 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″
1/4″ to 3/4″ (9 steps): 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″
1/8″ to 1/2″ (13 steps): 1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2″
3/16″ to 1/2″ (6 steps): 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″
Shank diameter:
1/4″ to 1-3/8″: 8mm / 0.3in
3/16″ to 7/8″: 8mm / 0.3in
1/4″ to 3/4″: 8mm / 0.3in
1/8″ to 1/2″: 6mm / 0.2in
3/16″ to 1/2″: 6mm / 0.2in
Package list:
5 * Step Drill
1 * Aluminum Box
