Consolidated Toledo Drill

Consolidated Toledo Drill - Drill, Taps, and Specialty Tools

Consolidated Toledo Drill

America´s Finest High Speed Cutting Tools™

Tap — Feeds and Speeds

Toledo Drill - Basic Anatomy Taps Diagram

How to Tap Effectively & Optimize Tool Life
To minimize tapping issues the following rules should be followed:

    • Use a pitch controlled tapping attachment.

    • Choose the correct lubricant ( Ultra S/P™ Super Premium ).

    • Use the correct Tapping Drill Size and Type of Tap.

    • Choose the correct Speeds and Feeds.

    • Keeping taps sharp, check tap for wear.

    • Ensure accurate alignment.

    • Check hardness of material, especially when changing batches of material.


Chamfer Tap Style Diagram

Tapping Speed can be calculated using: ( Use Table below )
RPM = Feed Speed (SFM) / 0.26 x Tap's Outer Dimension

Tapping speeds should be
"DECREASED" if

• Lubricant is poor or Flow is restricted.

• Bottom lead or Spiral flute taps are used.

• Thread depth ( % ) increase.

• Thread pitch is course.

• Cutting taper threads ( 50% normal speed )

Tapping speeds can be
"INCREASED" if

• Thread depth decreases.

• Thread pitch is fine.

• Coolant flow and Quality is good.

• Spiral point plug taps are used.


Tapping Speeds
Proper tapping speeds are very important in obtaining efficient tapping results. The optimum speed for tapping is highest speed that conditions permit, consistent with acceptable tool life. Speeds must be reduced as length of hole increases. Holes, taps with tapered chamfers are able to operate faster than taps with bottoming chamfers. Vertical tapping speeds can be increased, compared to horizontal tapping.

Recommended Feeds and Speeds:
Table below suggests a "starting point" for selecting the speed to operate the tap.

Material Recommended Feeds and Speeds (SFM)
Aluminum - Cast Alloys 60 - SFM
Aluminum - Diecast Alloys 70 - SFM
Aluminum - Wrought Alloys 80 - SFM
Brass 60 - 100 SFM
Bronze 30 - 40 SFM
Copper 60 - 80 SFM
Gun Metal 50 - 60 SFM
Cast Iron - Grey 30 - 60 SFM
Cast Iron - Ductile 50 - SFM
Cast Iron - Alloys 15 - 30 SFM
Malleable Alloy 20 - 40 SFM
Magnesium Alloys 50 - 70 SFM
Nickel Alloys 10 - SFM
Nimonic Alloys 10 - 12 SFM
Mild Steel 30 - 50 SFM
Steel - Medium Carbon 35 - SFM
Tool Steels 15 - 25 SFM
Cast Steel 25 - SFM
Titanium Alloys 10 - SFM
Stainless Steel - 300 Series 10 - 20 SFM
Stainless Steel - 400 Series 15 - SFM
Plastic 50 - 70 SFM
Zinc - Diecasting 80 - SFM