COUNTERBORES — CARBIDE TIPPED

THREE/FOUR FLUTES — TAPER SHANK

TYPE 2516 — THREE/FOUR FLUTES — TAPER SHANK

For machining cast iron, non ferrous materials, composites, plastics and non-metals.
Carbide tips brazed to hardened alloy steel bodies.
Right spiral polished flutes.
Cutting diameter tolerance — plus .001", minus .000".
Shank diameter tolerance — plus .0000", minus .0005".

OPTIONS

Intermediate decimal or metric diameters.
Chamfers or radius end.
Cutting diameter ground down for small step.


Below are the critical dimensions of our Three/four Flutes - Taper Shank Counterbores. Please choose the Counterbores that meets your tooling needs.
Tool
Diameter		 Dimensions Type 2516
EDP NO.		 Price Finished To Modified Tool Diameter
Diameter Taper No. of Flutes Overall Length Modified Diameter Range Price Each - Based on Quantity Ordered
Frac. Dec. Min. Cut Pilot Hole Low High 1 2 3 4 5-7 8-14*
   1/4   .2500  .1140  .0938 1 3 3 13/16 251608 $64.50  .2381  .2530 $95.55 $80.05 $74.85 $72.30 $69.65 $67.50
   9/32  .2813  .1140  .0938 1 3 3 13/16 251609 77.55  .2531  .2840 108.60 93.05 87.85 85.35 82.75 80.55
   5/16  .3125  .1140  .0938 1 3 3 13/16 251610 70.55  .2841  .3150 101.60 86.05 80.90 78.35 75.70 73.55
  11/32  .3438  .1140  .0938 1 3 3 13/16 251611 86.90  .3151  .3470 118.00 102.45 97.25 94.70 92.10 89.95
   3/8   .3750  .1820  .1563 1 3 4  1/16 251612 72.80  .3471  .3780 101.45 87.15 82.35 80.00 77.60 75.65
  13/32  .4063  .1820  .1563 1 3 4  1/16 251613 82.25  .3781  .4090 110.90 96.55 91.80 89.45 87.05 85.05
   7/16  .4375  .1820  .1563 1 3 4  1/16 251614 74.80  .4091  .4410 103.40 89.10 84.30 82.00 79.55 77.60
  15/32  .4688  .2280  .1875 1 3 4  5/16 251615 90.80  .4411  .4720 119.45 105.10 100.35 98.00 95.55 93.60
   1/2   .5000  .2280  .1875 1 3 4  5/16 251616 82.55  .4721  .5030 111.25 96.90 92.10 89.80 87.35 85.40
  17/32  .5313  .2280  .1875 1 3 4  5/16 251617 92.50  .5031  .5340 121.10 106.80 102.05 99.65 97.25 95.30
   9/16  .5625  .2280  .1875 1 3 4  5/16 251618 84.10  .5341  .5660 112.75 98.40 93.65 91.25 88.90 86.90
  19/32  .5938  .2280  .1875 2 3 5  1/8  251619 95.00  .5661  .5970 123.65 109.35 104.55 102.20 99.80 97.80
   5/8   .6250  .2280  .1875 2 3 5  1/8  251620 86.35  .5971  .6280 115.00 100.70 95.90 93.55 91.10 89.15
  21/32  .6563  .2280  .1875 2 3 5  1/8  251621 100.30  .6281  .6590 128.95 114.60 109.80 107.50 105.05 103.10
  11/16  .6875  .2280  .1875 2 3 5  1/8  251622 91.10  .6591  .6910 119.80 105.45 100.70 98.30 95.90 93.90
  23/32  .7188  .2900  .2500 2 3 5  3/8  251623 101.95  .6911  .7220 130.60 116.30 111.50 109.20 106.75 104.80
   3/4   .7500  .2900  .2500 2 3 5  3/8  251624 92.65  .7221  .7530 121.30 106.95 102.20 99.85 97.40 95.45
  25/32  .7813  .2900  .2500 2 3 5  3/8  251625 103.65  .7531  .7840 132.30 118.00 113.20 110.80 108.45 106.50
  13/16  .8125  .2900  .2500 2 3 5  3/8  251626 94.30  .7841  .8160 122.90 108.60 103.85 101.45 99.05 97.10
  27/32  .8438  .2900  .2500 2 3 5  3/8  251627 109.00  .8161  .8470 137.70 123.40 118.60 116.25 113.85 111.85
   7/8   .8750  .2900  .2500 2 3 5  3/8  251628 99.10  .8471  .8780 127.75 113.40 108.65 106.30 103.90 101.90
  29/32  .9063  .2900  .2500 3 3 6  1/8  251629 112.00  .8781  .9090 140.60 126.30 121.55 119.15 116.75 114.80
  15/16  .9375  .2900  .2500 3 3 6  1/8  251630 101.80  .9091  .9410 130.45 116.10 111.35 108.95 106.60 104.60
  31/32  .9688  .3530  .3125 3 3 6  3/8  251631 114.55  .9411  .9720 143.20 128.90 124.15 121.75 119.30 117.35
1         1.0000  .3530  .3125 3 3 6  3/8  251632 108.10  .9721 1.0030 137.85 123.00 118.00 115.55 113.05 111.00
1  1/16 1.0625  .3530  .3125 3 3 6  3/8  251634 109.50 1.0031 1.0660 139.20 124.35 119.40 116.95 114.45 112.40
1  1/8  1.1250  .3530  .3125 3 3 6  3/8  251636 112.95 1.0661 1.1280 142.75 127.90 122.85 120.45 117.90 115.90
1  3/16 1.1875  .3530  .3125 3 3 6  3/8  251638 116.80 1.1281 1.1905 146.60 131.75 126.70 124.30 121.75 119.75
1  1/4  1.2500  .4260  .3750 3 4 6  5/8  251640 129.85 1.1906 1.2530 162.10 145.95 140.60 137.95 135.25 133.00
1  5/16 1.3125  .4260  .3750 3 4 6  5/8  251642 139.20 1.2531 1.3155 171.50 155.30 150.00 147.30 144.60 142.40
1  3/8  1.3750  .4260  .3750 3 4 6  5/8  251644 145.85 1.3156 1.3780 178.10 162.00 156.60 153.95 151.25 149.00
1  7/16 1.4375  .4260  .3750 4 4 7  7/8  251646 162.25 1.3781 1.4405 197.35 179.80 173.90 171.05 168.10 165.65
1  1/2  1.5000  .4260  .3750 4 4 7  7/8  251648 179.90 1.4406 1.5030 215.00 197.45 191.60 188.70 185.80 183.35
1  9/16 1.5625  .4890  .4375 4 4 8  1/8  251650 184.55 1.5031 1.5660 219.55 202.05 196.25 193.35 190.35 188.00
1  5/8  1.6250  .4890  .4375 4 4 8  1/8  251652 187.85 1.5661 1.6280 222.85 205.35 199.55 196.65 193.65 191.30
1 11/16 1.6875  .4890  .4375 4 4 8  1/8  251654 224.75 1.6281 1.6910 262.65 243.70 237.40 234.25 231.05 228.45
1  3/4  1.7500  .4890  .4375 4 4 8  1/8  251656 224.75 1.6911 1.7530 262.65 243.70 237.40 234.25 231.05 228.45
1 13/16 1.8125  .4890  .4375 4 4 8  1/8  251658 266.00 1.7531 1.8160 303.80 284.90 278.60 275.45 272.25 269.65
1  7/8  1.8750  .4890  .4375 4 4 8  1/8  251660 266.00 1.8161 1.8780 303.80 284.90 278.60 275.45 272.25 269.65
1 15/16 1.9375  .4890  .4375 4 4 8  1/8  251662 290.60 1.8781 1.9410 328.45 309.55 303.20 300.15 296.95 294.30
2         2.0000  .5510  .5000 4 4 8  3/8  251664 290.60 1.9411 2.0030 328.45 309.55 303.20 300.15 296.95 294.30
* Quantities of 15 or more - price of fractional size in same size range
Don't see the Three/four Flutes - Taper Shank Counterbores you need?
If the above dimensions do not meet your specific Three/four Flutes - Taper Shank Counterbores needs we may be able to make modifications to one of the above Three/four Flutes - Taper Shank Counterbores or we can quote a full special to your exact requirements. Simply click here to view and print our special tool quote form. Fill it out and fax (800-867-9312) it back to Rock River Tool. We will let you know how we will provide the Three/four Flutes - Taper Shank Counterbores you requested.
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