High Speed Steel Step Drills & Sets
#4TM TIN UNIBIT STEP DRILL

High Speed Steel Step Drills & Sets

Made In The USA
Item #: 01-906-059
Brand: UNIBIT
Size Type: Metric
Size Range: 4mm to 22mm by 2mm
No. of Holes: 10

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Up to 13 different hole sizes without changing bits

Applications

  • Specialty step drill designed to machine a large number of different hole diameters with a single tool.
  • Single cutting edge creates perfectly round holes in metal, plastic, and wood without center punching.
  • For use with thin materials.
  • Two general variations are available for either self-starting holes or for enlarging existing holes.
  • Single flute design helps to ensure perfectly round holes in a wide range of ferrous, non-ferrous and non-metallic materials.

Features

  • Right hand (clockwise rotation) cutting direction.
  • Multi-step design with progressively larger holes.
  • Self-starting or hole enlarging styles.
  • Straight shank diameters of 1/4", 3/8" or 1/2" (6.5mm, 10mm, or 13mm).
  • Conical design permits as many as 13 different size holes to be drilled with one drill.
  • These drills, depending on the model, have a step 1/8" to 3/8" (3.5mm to 11mm) thick between sizes.
  • 20 different models are available to produces holes from 1/8" to 1-3/8" or 4mm to 35mm.
  • The hardened, high speed steel drill body is available in either an uncoated style or with a TiN coating for longer life in tougher materials.
Cobalt
  • M35 grade provides high heat & abrasion resistance.
  • Longest cutting life.
  • 6 times longer life vs. competition.

Technical Data

  • 1/8" to 3/8" (3.5mm to 11mm) step thicknesses.
  • Cylindrically ground from the solid.
  • Bright finish.
UNIBIT HSS Metric Self-Starting Multiple Hole Size TiN Coated Step Drill
Product Specifications
Brand UNIBIT
Size Type Metric
Size Range 4mm to 22mm by 2mm
No. of Holes 10
Finish Coating TiN
Model # 4MT
Application Specialty step drill designed to machine a large number of different hole diameters with a single tool. Single cutting edge creates perfectly round holes in metal, plastic, wood and other thin materials without center punching.
Hardness 58 to 60 RC
No. of Flutes Single Flute
OC_Steel X
Overall Length N/A
Prop. 65 Yes
Shank Diameter 10mm
Shank Size 10mm
Step Thickness 5mm
Tool Material High Speed Steel
Type High Speed Steel Step Drills & Sets
Weight 0.19 lbs.
Country of Origin UNITED STATES OF AMERICA
Prop 65 Warning Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.