BB Tools

118° Carbide Micro Drill for Steel | 0.3–3.99mm, 4mm Shank

$12.00 USD

Oferta Agotado

118° Carbide Micro Drills for Steel

BB2055 is BB Tool’s coated solid carbide micro drill series for steel machining. This listing offers metric cutting diameters from 0.3 to 3.99 mm, a 4 mm shank and a 50 mm overall length. Its broad selection of small diameters helps you choose a drill for the hole size specified on your drawing.

Choose the Complete Specification

Select the cutting diameter, cutting length and point angle together. Some diameters have more than one cutting-length option. The 4 mm shank is the clamping diameter, not the hole diameter; overall length is not the drilling depth.

For the 0.41–0.50 mm cutting-diameter options, the cutting length is 5 mm. Check the specification image and the full option name before ordering.

Name:BB Micro Drill Material:Micro-grained carbde

Number of flutes:2 Series:BB2055

Diameter of shank:4mm Application:For general purpose

BB2055 Micro Drill Specifications

4 mm shank. The 0.41–0.50 mm cutting-diameter sizes have a 5 mm cutting length. Overall length is 50 mm. Check the point angle listed in the specification table and selected option. Select the complete dimensions shown in the product options. Tap a specification image to view it at full size.

View text specifications

Cutting diameter	Shank diameter	Cutting length	Overall length	Point angle	Tolerance
0.3~0.4	4	4	50	118°	-0.005
0.41~0.5	4	5	50	118°	-0.005
0.51~0.99	4	6	50	118°	-0.005
1.01~1.49	4	8	50	118°	-0.005
1.51~1.99	4	10	50	118°	-0.005
1.0	4	11	50	118°	-0.005
1.1	4	11	50	118°	-0.005
1.2	4	11	50	118°	-0.005
1.25	4	12	50	118°	-0.005
1.3	4	12	50	118°	-0.005
1.35	4	12	50	118°	-0.005
1.4	4	12	50	118°	-0.005
1.45	4	12	50	118°	-0.005
1.5	4	12	50	118°	-0.005
1.55	4	12	50	118°	-0.005
1.6	4	12	50	118°	-0.005
1.65	4	12	50	118°	-0.005
1.7	4	12	50	118°	-0.005
1.75	4	12	50	118°	-0.005
1.8	4	12	50	118°	-0.005
1.85	4	12	50	118°	-0.005
1.9	4	12	50	118°	-0.005
1.95	4	12	50	118°	-0.005
2.01~2.49	4	12	50	118°	-0.005
1.95	4	15	50	118°	-0.005
2	4	15	50	118°	-0.005
2.05	4	15	50	118°	-0.005
2.1	4	15	50	118°	-0.005
2.15	4	15	50	118°	-0.005
2.2	4	15	50	118°	-0.005
2.25	4	15	50	118°	-0.005
2.3	4	15	50	118°	-0.005
2.35	4	15	50	118°	-0.005
2.4	4	15	50	118°	-0.005
2.45	4	15	50	118°	-0.005
2.5	4	15	50	118°	-0.005
2.51~3.0	4	15	50	118°	-0.005
3.01~3.49	4	18	50	118°	-0.005
3.05	4	20	50	118°	-0.005
3.1	4	20	50	118°	-0.005
3.15	4	20	50	118°	-0.005
3.2	4	20	50	118°	-0.005
3.25	4	20	50	118°	-0.005
3.3	4	20	50	118°	-0.005
3.35	4	20	50	118°	-0.005
3.4	4	20	50	118°	-0.005
3.45	4	20	50	118°	-0.005
3.5	4	20	50	118°	-0.005
3.3	4	20	50	135°	-0.005
3.4	4	20	50	135°	-0.005
3.6	4	20	50	135°	-0.005
3.7	4	20	50	135°	-0.005
3.5	4	20	50	135°	-0.005
3.51~3.99	4	20	50	118°	-0.005
3.8	4	20	50	135°	-0.005
3.9	4	20	50	135°	-0.005

Machine Use and Setup

Use this coated solid carbide drill in a stable machine setup. It is designed for machine use, not handheld electric drills.

Primary application: small-hole drilling in steel. For aluminum machining, see the BF2055 uncoated micro drills linked below.

-Diameter of shank :4mm

Recommended Cutting Conditions

Select cutting conditions for the workpiece and the exact drill size. Check the holder, tool alignment and workpiece clamping before drilling. Use a stable machine setup and appropriate cooling and chip removal; do not apply one speed or feed to the entire size range.