Destiny Tool
408.988.8898
  • Home
    • Quick Links
  • About
    • Terms & Conditions
    • Test Tool Policy
    • RGA Returned Goods Authorization
    • Sponsorship
  • Technical
    • Carbide Substrate
    • Geometry
    • Coatings
    • Chip Formation
    • ISO 513 & Formulas
    • Speeds & Feeds >
      • Viper S&F
      • Diamond Back S&F
      • Raptor DVH S&F
      • Raptor 3/6 S&F
      • Python S&F
      • Miniature S&F
    • Ball End Mills
    • Charts & Calculators
    • Surface Finish
    • Torque Efficiency
    • Toolholders
    • End Mill Troubleshooting
  • Products
    • Select an End Mill
    • Viper DVH
    • Diamond Back
    • Raptor DVH
    • Raptor DVH 3/6
    • Python
    • Miniatures >
      • Viper Mini ERS
      • Cobra Miniatures
    • Specialty Tools >
      • Chamfer Tools
      • Countersinks
      • Corner Rounders
      • Dovetail Cutters
      • Drill Mills
      • Engraving Tools
      • Spot Drills
      • Thread Mills
  • News
  • Events
  • Contact
    • Consultation Request
    • Test Tool Report
    • Specials Request
    • Distributor LogIn
Destiny Tool Spot Drills

Spot Drills

Spot drilling prior to the full drill cycle can ensure accurate hole location by avoiding drill deflection. Spot Drilling is recommended when a drill might have a tendency to move off center and particularly recommend in deep-hole drilling. These drills are designed to be extremely rigid to precisely spot a hole for a twist drill.  The primary purpose of a spot drill to make a "dimple" in the workpiece so that the twist drill does not deflect and "walk" off-center and the hole is drilled in the correct location.

Our carbide NC spot drills are stocked standards, with a 90° or 120° and a a 140° point angle.  These carbide spot drill are especially useful in abrasive workpiece materials where the machining conditions are rigid. 

Spot Drill Point Depth

 60 ̊   0.866 x dia = point depth  
 82 ̊   0.575 x dia = point depth  
 90 ̊   0.500 x dia = point depth  
118 ̊  0.300 x dia = point depth  
120 ̊  0.288 x dia = point depth  
135 ̊  0.207 x dia = point depth 

About Spot Drills

A spot drill typically has a tight tolerance point geometry with a very short flute length. 

It is important to know that a spot drill has no land or body relief, and is NOT designed to drill past the depth of the point angle, which is just enough to drill an detent or "dimple" in the workpiece. 

Spot drills are used to improve the accuracy of secondary drill operations but they can be used as a chamfering tool if the spot drill diameter is larger than the final hole size. 

Ideally, the spot drill diameter should be about 70% of the size of your final drill diameter. The spot drill point angle should be greater than or less than the final drill’s point angle. 

  • Spot drilling is not recommended in hardened steels.
  • Contacting the corners of the carbide drill before the center point in the opening of the hole could lead to corner chipping.

Using  a spot drill with an angle less than the drill point angle WILL cause the drill flutes to be "blown off"

Never use a 90 ̊ Spot drill that will be followed by a 140 ̊ drill point!
Picture

Spot Drill Products

online database form by Ragic

CONTACT US

Destiny Tool
18434 Technology Dr.
​Morgan Hill, CA 95037
US TF: 800.527.8665  
Tel: 408.988.8898    
​Fax: 408.988.2606
info@destinytool.com

FORMS

Consultation Request
Test Tool Form
Specials RFQ
RGA Form
​Check Stock
Sponsorship

REGISTER

Picture

CONNECT WITH US


Picture
Picture
Picture
 WARNING: These products contain Cobalt, a chemical known to the State of California to cause cancer. ​For more information go to www.P65Warnings.ca.gov
​©2022  Destiny Tool. All Rights Reserved        site design: Rapid Production Marketing