AbrasiveStore.com

Contender: Made in the USA

 

Technical Information: High Speed Steel Drilling

Diameter at Point
 
Size (Inclusive) Tolerance
OVER #81 TO 1/8+.0000 TO -.0005
OVER 1/8 TO 1/4+.0000 TO -.0007
OVER 1/4 TO 1/2+.0000 TO -.0010
OVER 1/2 TO 1+.0000 TO -.0012
OVER 1 TO 2+.0000 TO -.0015
OVER 2 TO 3-1 /2+.0000 TO -.0020
 
 
Shank Diameter
 
Size (Inclusive) Tolerance
OVER #81 TO 1/8-.0000 TO -.0025
OVER 1/8 TO 1/4-.0005 TO -.0030
OVER 1/4 TO 1/2-.0005 TO -.0045
OVER 1/2 TO 2-.0005 TO -.0030
 
 
Back Taper
 
Size (Inclusive) Tolerance
OVER #81 TO 1/8.0000 TO .0008
OVER 1/8 TO 1/4.0002 TO .0008
OVER 1/4 TO 1/2.0002 TO .0009
OVER 1/2 TO 1.0003 TO .0011
OVER 1 TO 3-1 /2.0004 TO .0015
 
 
Flute Length
 
Size (Inclusive) Tolerance
OVER #81 TO 1/8+1/8 TO -1/16
OVER 1/8 TO 1/2+1/8 TO -1/8
OVER 1/2 TO 1+1/4 TO -1/8
OVER 1 TO 2+1/4 TO -1/4
OVER 2 TO 3-1 /2+3/8 TO -3/8
 
 
Overall Length
 
Size (Inclusive) Tolerance
OVER #81 TO 1/8+1/8 TO -1/16
OVER 1/8 TO 1/2+1/8 TO -1/8
OVER 1/2 TO 1+1/4 TO -1/8
OVER 1 TO 2+1/4 TO -1/4
OVER 2 TO 3-1 /2+3/8 TO -3/8
 
 
Included Point Angle
 
Size (Inclusive) Included Angle Tolerance
1/16 TO 1/2118°±5°
OVER 1/2 TO 1-1/2118°±3°
OVER 1-1/2 TO 3-1/2118°±2°
 
 
Lip Height
 
Size (Inclusive) TIV (Total Indicator Variation)
1/16 TO 1/8.0020
OVER 1/8 TO 1/4.0030
OVER 1/4 TO 1/2.0040
OVER 1/2 TO 1.0050
OVER 1 TO 3-1/2.0060
NOTE: 95% of drills in any one lot to fall within tolerances above.
Suggested Method Of Measurement:
1. Rotate the drill in a vee block against a back end stop.
2. Measure the cutting lip height variation on a comparator, or with an indicator set at allocation approximately 75% of the distance from the center to the periphery of the drill.
 
 
Centrality of Web
 
Size (Inclusive) TIV (Total Indicator Variation)
1/16 TO 1/8.0030
OVER 1/8 TO 1/4.0040
OVER 1/4 TO 1/2.0050
OVER 1/2 TO 1.0070
OVER 1 TO 3-1/2.0100
NOTE: 95% of drills in any one lot to fall within tolerances above.
Suggested Method Of Measurement:
1. Rotate the drill in a close fitting bushing.
2. Record the difference in indicator readings of the web at the point as the drill is indexed 180°.
 
 
Flute Spacing
 
Size (Inclusive) Tolerance (TIV) Actual Deviation
1/16 TO 1/8.0030.0015
OVER 1/8 TO 1/4.0060.0030
OVER 1/4 TO 1/2.0100.0050
OVER 1/2 TO 1.0140.0070
OVER 1 TO 3-1/2.0260.0130
NOTE: 95% of drills in any one lot to fall within tolerances above.
Suggested Method Of Measurement:
1. Place the drill in a vee block against a back end stop, and rotate it against a radial finger stop.
2. Take an indicator reading at the leading edge of the margin on the opposite flute.
3. Repeat for the other flute and note the difference between the two readings.
4. The deviation in flute spacing is equal to one-half the difference between the two readings.


Return to Manufacturer Index

© 2018 AbrasiveStore.com  |  Contact  |  Privacy  |  XML Map  |  Site Map
All other trademarks, logos and copyrights are property of their respective owners.