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 $85.60  .2381  .2530 $126.95 $106.30 $99.40 $96.00 $92.50 $89.70
   9/32  .2813  .1140  .0938 1 3 3 13/16 251609 103.05  .2531  .2840 144.25 123.55 116.70 113.35 109.95 107.00
   5/16  .3125  .1140  .0938 1 3 3 13/16 251610 88.00  .2841  .3150 126.75 107.35 100.95 97.75 94.45 91.80
  11/32  .3438  .1140  .0938 1 3 3 13/16 251611 108.45  .3151  .3470 147.20 127.75 121.30 118.15 114.85 112.20
   3/8   .3750  .1820  .1563 1 3 4  1/16 251612 90.85  .3471  .3780 126.50 108.70 102.70 99.80 96.80 94.40
  13/32  .4063  .1820  .1563 1 3 4  1/16 251613 102.60  .3781  .4090 138.35 120.45 114.55 111.55 108.60 106.10
   7/16  .4375  .1820  .1563 1 3 4  1/16 251614 93.30  .4091  .4410 128.95 111.15 105.15 102.30 99.25 96.80
  15/32  .4688  .2280  .1875 1 3 4  5/16 251615 113.30  .4411  .4720 149.00 131.10 125.15 122.25 119.25 116.80
   1/2   .5000  .2280  .1875 1 3 4  5/16 251616 103.00  .4721  .5030 138.80 120.85 114.85 112.05 108.90 106.50
  17/32  .5313  .2280  .1875 1 3 4  5/16 251617 115.35  .5031  .5340 151.05 133.20 127.20 124.30 121.30 118.85
   9/16  .5625  .2280  .1875 1 3 4  5/16 251618 104.90  .5341  .5660 140.65 122.75 116.85 113.85 110.90 108.45
  19/32  .5938  .2280  .1875 2 3 5  1/8  251619 118.50  .5661  .5970 154.30 136.40 130.45 127.50 124.50 122.00
   5/8   .6250  .2280  .1875 2 3 5  1/8  251620 107.70  .5971  .6280 143.40 125.60 119.60 116.75 113.60 111.20
  21/32  .6563  .2280  .1875 2 3 5  1/8  251621 125.10  .6281  .6590 160.85 143.00 137.00 134.15 131.05 128.65
  11/16  .6875  .2280  .1875 2 3 5  1/8  251622 113.60  .6591  .6910 149.45 131.50 125.60 122.60 119.60 117.15
  23/32  .7188  .2900  .2500 2 3 5  3/8  251623 127.15  .6911  .7220 162.90 145.05 139.10 136.20 133.15 130.75
   3/4   .7500  .2900  .2500 2 3 5  3/8  251624 115.60  .7221  .7530 151.30 133.45 127.50 124.60 121.50 119.00
  25/32  .7813  .2900  .2500 2 3 5  3/8  251625 129.35  .7531  .7840 165.00 147.20 141.20 138.25 135.25 132.85
  13/16  .8125  .2900  .2500 2 3 5  3/8  251626 117.60  .7841  .8160 153.30 135.50 129.55 126.50 123.55 121.10
  27/32  .8438  .2900  .2500 2 3 5  3/8  251627 135.95  .8161  .8470 171.75 153.90 147.95 145.00 142.00 139.55
   7/8   .8750  .2900  .2500 2 3 5  3/8  251628 123.60  .8471  .8780 159.35 141.45 135.55 132.55 129.60 127.10
  29/32  .9063  .2900  .2500 3 3 6  1/8  251629 139.70  .8781  .9090 175.40 157.50 151.65 148.60 145.65 143.20
  15/16  .9375  .2900  .2500 3 3 6  1/8  251630 127.00  .9091  .9410 162.70 144.85 138.90 135.90 133.00 130.50
  31/32  .9688  .3530  .3125 3 3 6  3/8  251631 142.95  .9411  .9720 178.65 160.80 154.85 151.90 148.80 146.35
1         1.0000  .3530  .3125 3 3 6  3/8  251632 134.85  .9721 1.0030 171.95 153.40 147.20 144.20 140.95 138.45
1  1/16 1.0625  .3530  .3125 3 3 6  3/8  251634 136.60 1.0031 1.0660 173.60 155.10 148.95 145.90 142.70 140.20
1  1/8  1.1250  .3530  .3125 3 3 6  3/8  251636 140.90 1.0661 1.1280 178.05 159.55 153.25 150.25 147.10 144.55
1  3/16 1.1875  .3530  .3125 3 3 6  3/8  251638 145.70 1.1281 1.1905 182.90 164.30 158.05 155.05 151.90 149.35
1  1/4  1.2500  .4260  .3750 3 4 6  5/8  251640 162.00 1.1906 1.2530 202.20 182.10 175.40 172.10 168.70 165.90
1  5/16 1.3125  .4260  .3750 3 4 6  5/8  251642 173.60 1.2531 1.3155 213.95 193.70 187.10 183.70 180.40 177.60
1  3/8  1.3750  .4260  .3750 3 4 6  5/8  251644 181.95 1.3156 1.3780 222.15 202.05 195.35 192.00 188.70 185.85
1  7/16 1.4375  .4260  .3750 4 4 7  7/8  251646 202.40 1.3781 1.4405 246.15 224.30 216.90 213.35 209.70 206.65
1  1/2  1.5000  .4260  .3750 4 4 7  7/8  251648 224.40 1.4406 1.5030 268.15 246.30 239.00 235.40 231.75 228.70
1  9/16 1.5625  .4890  .4375 4 4 8  1/8  251650 241.10 1.5031 1.5660 286.90 264.05 256.50 252.60 248.80 245.70
1  5/8  1.6250  .4890  .4375 4 4 8  1/8  251652 245.45 1.5661 1.6280 291.20 268.40 260.75 256.95 253.05 250.00
1 11/16 1.6875  .4890  .4375 4 4 8  1/8  251654 293.65 1.6281 1.6910 343.15 318.45 310.25 306.15 301.90 298.55
1  3/4  1.7500  .4890  .4375 4 4 8  1/8  251656 293.65 1.6911 1.7530 343.15 318.45 310.25 306.15 301.90 298.55
1 13/16 1.8125  .4890  .4375 4 4 8  1/8  251658 347.60 1.7531 1.8160 397.00 372.35 364.05 359.95 355.80 352.35
1  7/8  1.8750  .4890  .4375 4 4 8  1/8  251660 347.60 1.8161 1.8780 397.00 372.35 364.05 359.95 355.80 352.35
1 15/16 1.9375  .4890  .4375 4 4 8  1/8  251662 379.75 1.8781 1.9410 429.25 404.50 396.20 392.20 388.05 384.60
2         2.0000  .5510  .5000 4 4 8  3/8  251664 379.75 1.9411 2.0030 429.25 404.50 396.20 392.20 388.05 384.60
* 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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