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 $74.45  .2381  .2530 $110.40 $92.45 $86.45 $83.50 $80.45 $78.00
   9/32  .2813  .1140  .0938 1 3 3 13/16 251609 89.60  .2531  .2840 125.45 107.45 101.50 98.55 95.60 93.05
   5/16  .3125  .1140  .0938 1 3 3 13/16 251610 81.50  .2841  .3150 117.35 99.40 93.45 90.50 87.45 85.00
  11/32  .3438  .1140  .0938 1 3 3 13/16 251611 100.40  .3151  .3470 136.30 118.30 112.30 109.40 106.35 103.90
   3/8   .3750  .1820  .1563 1 3 4  1/16 251612 84.10  .3471  .3780 117.15 100.65 95.10 92.40 89.65 87.40
  13/32  .4063  .1820  .1563 1 3 4  1/16 251613 95.00  .3781  .4090 128.10 111.55 106.05 103.30 100.55 98.25
   7/16  .4375  .1820  .1563 1 3 4  1/16 251614 86.40  .4091  .4410 119.40 102.90 97.35 94.70 91.90 89.65
  15/32  .4688  .2280  .1875 1 3 4  5/16 251615 104.90  .4411  .4720 137.95 121.40 115.90 113.20 110.40 108.15
   1/2   .5000  .2280  .1875 1 3 4  5/16 251616 95.35  .4721  .5030 128.50 111.90 106.35 103.75 100.85 98.60
  17/32  .5313  .2280  .1875 1 3 4  5/16 251617 106.80  .5031  .5340 139.85 123.35 117.80 115.10 112.30 110.05
   9/16  .5625  .2280  .1875 1 3 4  5/16 251618 97.15  .5341  .5660 130.25 113.65 108.20 105.40 102.70 100.40
  19/32  .5938  .2280  .1875 2 3 5  1/8  251619 109.70  .5661  .5970 142.85 126.30 120.80 118.05 115.30 112.95
   5/8   .6250  .2280  .1875 2 3 5  1/8  251620 99.70  .5971  .6280 132.80 116.30 110.75 108.10 105.20 102.95
  21/32  .6563  .2280  .1875 2 3 5  1/8  251621 115.85  .6281  .6590 148.95 132.40 126.85 124.20 121.35 119.10
  11/16  .6875  .2280  .1875 2 3 5  1/8  251622 105.20  .6591  .6910 138.40 121.75 116.30 113.50 110.75 108.45
  23/32  .7188  .2900  .2500 2 3 5  3/8  251623 117.75  .6911  .7220 150.85 134.30 128.80 126.10 123.30 121.05
   3/4   .7500  .2900  .2500 2 3 5  3/8  251624 107.05  .7221  .7530 140.10 123.55 118.05 115.35 112.50 110.20
  25/32  .7813  .2900  .2500 2 3 5  3/8  251625 119.75  .7531  .7840 152.80 136.30 130.75 128.00 125.25 123.00
  13/16  .8125  .2900  .2500 2 3 5  3/8  251626 108.90  .7841  .8160 141.95 125.45 119.95 117.15 114.40 112.15
  27/32  .8438  .2900  .2500 2 3 5  3/8  251627 125.90  .8161  .8470 159.05 142.50 137.00 134.25 131.50 129.20
   7/8   .8750  .2900  .2500 2 3 5  3/8  251628 114.45  .8471  .8780 147.55 130.95 125.50 122.75 120.00 117.70
  29/32  .9063  .2900  .2500 3 3 6  1/8  251629 129.35  .8781  .9090 162.40 145.85 140.40 137.60 134.85 132.60
  15/16  .9375  .2900  .2500 3 3 6  1/8  251630 117.60  .9091  .9410 150.65 134.10 128.60 125.85 123.15 120.85
  31/32  .9688  .3530  .3125 3 3 6  3/8  251631 132.35  .9411  .9720 165.40 148.90 143.40 140.65 137.80 135.50
1         1.0000  .3530  .3125 3 3 6  3/8  251632 124.85  .9721 1.0030 159.20 142.05 136.30 133.50 130.50 128.20
1  1/16 1.0625  .3530  .3125 3 3 6  3/8  251634 126.50 1.0031 1.0660 160.75 143.60 137.90 135.10 132.15 129.80
1  1/8  1.1250  .3530  .3125 3 3 6  3/8  251636 130.45 1.0661 1.1280 164.85 147.75 141.90 139.10 136.20 133.85
1  3/16 1.1875  .3530  .3125 3 3 6  3/8  251638 134.90 1.1281 1.1905 169.35 152.15 146.35 143.55 140.65 138.30
1  1/4  1.2500  .4260  .3750 3 4 6  5/8  251640 150.00 1.1906 1.2530 187.20 168.60 162.40 159.35 156.20 153.60
1  5/16 1.3125  .4260  .3750 3 4 6  5/8  251642 160.75 1.2531 1.3155 198.10 179.35 173.25 170.10 167.05 164.45
1  3/8  1.3750  .4260  .3750 3 4 6  5/8  251644 168.45 1.3156 1.3780 205.70 187.10 180.90 177.80 174.70 172.10
1  7/16 1.4375  .4260  .3750 4 4 7  7/8  251646 187.40 1.3781 1.4405 227.90 207.70 200.85 197.55 194.15 191.35
1  1/2  1.5000  .4260  .3750 4 4 7  7/8  251648 207.80 1.4406 1.5030 248.30 228.05 221.30 217.95 214.60 211.75
1  9/16 1.5625  .4890  .4375 4 4 8  1/8  251650 223.25 1.5031 1.5660 265.65 244.50 237.50 233.90 230.35 227.50
1  5/8  1.6250  .4890  .4375 4 4 8  1/8  251652 227.25 1.5661 1.6280 269.65 248.50 241.45 237.90 234.30 231.50
1 11/16 1.6875  .4890  .4375 4 4 8  1/8  251654 271.90 1.6281 1.6910 317.75 294.85 287.25 283.45 279.55 276.45
1  3/4  1.7500  .4890  .4375 4 4 8  1/8  251656 271.90 1.6911 1.7530 317.75 294.85 287.25 283.45 279.55 276.45
1 13/16 1.8125  .4890  .4375 4 4 8  1/8  251658 321.85 1.7531 1.8160 367.60 344.75 337.10 333.30 329.45 326.25
1  7/8  1.8750  .4890  .4375 4 4 8  1/8  251660 321.85 1.8161 1.8780 367.60 344.75 337.10 333.30 329.45 326.25
1 15/16 1.9375  .4890  .4375 4 4 8  1/8  251662 351.60 1.8781 1.9410 397.45 374.55 366.85 363.15 359.30 356.10
2         2.0000  .5510  .5000 4 4 8  3/8  251664 351.60 1.9411 2.0030 397.45 374.55 366.85 363.15 359.30 356.10
* 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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