COUNTERBORES — CARBIDE TIPPED

STEEL CUTTING — TAPER SHANK

TYPE 2511 — STEEL CUTTING — TAPER SHANK

Carbide tips brazed to hardened alloy steel bodies.
Right hand spiral polished flutes.
Cutting diameter tolerance — plus .001" minus .000".
Shank diameter tolerance — plus .0000" minus .0005".

USE:

The special steel cutting grade of carbide permits the heavy chip loads and speeds required for machining steel — appropriate primary and secondary relief angles.

OPTIONS

Intermediate decimal or metric diameters.
Short shank or undersize diameter or flat shank.
Chamfers or radius end.
Cutting diameter ground down for small step.
Tanged shanks.


Below are the critical dimensions of our Steel Cutting - Taper Shank Counterbores. Please choose the Counterbores that meets your tooling needs.
Tool
Diameter
Dimensions Type 2511
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/  .2500  .1140  .0938 1 3 13/16 251108 $74.45  .2381  .2530 $110.40 $92.45 $86.45 $83.50 $80.45 $78.00
   9/32  .2813  .1140  .0938 1 3 13/16 251109 89.60  .2531  .2840 125.45 107.45 101.50 98.55 95.60 93.05
   5/16  .3125  .1140  .0938 1 3 13/16 251110 81.50  .2841  .3150 117.35 99.40 93.45 90.50 87.45 85.00
  11/32  .3438  .1140  .0938 1 3 13/16 251111 100.40  .3151  .3470 136.30 118.30 112.30 109.40 106.35 103.90
   3/  .3750  .1820  .1563 1 3  1/16 251112 84.10  .3471  .3780 117.15 100.65 95.10 92.40 89.65 87.40
  13/32  .4063  .1820  .1563 1 3  1/16 251113 95.00  .3781  .4090 128.10 111.55 106.05 103.30 100.55 98.25
   7/16  .4375  .1820  .1563 1 3  1/16 251114 86.40  .4091  .4410 119.40 102.90 97.35 94.70 91.90 89.65
  15/32  .4688  .2280  .1875 1 3  5/16 251115 104.90  .4411  .4720 137.95 121.40 115.90 113.20 110.40 108.15
   1/  .5000  .2280  .1875 1 3  5/16 251116 95.35  .4721  .5030 128.50 111.90 106.35 103.75 100.85 98.60
  17/32  .5313  .2280  .1875 1 3  5/16 251117 102.95  .5031  .5340 134.80 118.90 113.55 110.95 108.25 106.05
   9/16  .5625  .2280  .1875 1 3  5/16 251118 93.60  .5341  .5660 125.50 109.50 104.25 101.55 98.95 96.70
  19/32  .5938  .2280  .1875 2 3  1/ 251119 105.75  .5661  .5970 137.65 121.70 116.40 113.75 111.10 108.85
   5/  .6250  .2280  .1875 2 3  1/ 251120 96.10  .5971  .6280 128.00 112.10 106.75 104.15 101.40 99.20
  21/32  .6563  .2280  .1875 2 3  1/ 251121 111.60  .6281  .6590 143.50 127.55 122.20 119.65 116.90 114.75
  11/16  .6875  .2280  .1875 2 3  1/ 251122 101.40  .6591  .6910 133.35 117.35 112.10 109.40 106.75 104.50
  23/32  .7188  .2900  .2500 2 3  3/ 251123 113.45  .6911  .7220 145.40 129.45 124.15 121.55 118.85 116.65
   3/  .7500  .2900  .2500 2 3  3/ 251124 103.15  .7221  .7530 135.00 119.05 113.75 111.15 108.40 106.20
  25/32  .7813  .2900  .2500 2 3  3/ 251125 115.40  .7531  .7840 147.25 131.35 126.00 123.35 120.70 118.50
  13/16  .8125  .2900  .2500 2 3  3/ 251126 104.95  .7841  .8160 136.80 120.90 115.60 112.90 110.25 108.05
  27/32  .8438  .2900  .2500 2 3  3/ 251127 121.30  .8161  .8470 153.30 137.30 132.00 129.35 126.70 124.50
   7/  .8750  .2900  .2500 2 3  3/ 251128 110.30  .8471  .8780 142.20 126.20 120.95 118.30 115.65 113.40
  29/32  .9063  .2900  .2500 3 3  1/ 251129 124.65  .8781  .9090 156.50 140.55 135.30 132.60 129.95 127.80
  15/16  .9375  .2900  .2500 3 3  1/ 251130 113.30  .9091  .9410 145.15 129.20 123.90 121.25 118.65 116.45
  31/32  .9688  .3530  .3125 3 3  3/ 251131 127.50  .9411  .9720 159.35 143.45 138.15 135.50 132.75 130.60
        1.0000  .3530  .3125 3 3  3/ 251132 120.30  .9721 1.0030 153.45 136.90 131.35 128.65 125.75 123.55
 1/16 1.0625  .3530  .3125 3 3  3/ 251134 121.90 1.0031 1.0660 154.90 138.40 132.85 130.15 127.35 125.10
 1/ 1.1250  .3530  .3125 3 3  3/ 251136 125.70 1.0661 1.1280 158.85 142.35 136.75 134.05 131.25 129.00
 3/16 1.1875  .3530  .3125 3 3  3/ 251138 130.00 1.1281 1.1905 163.20 146.60 141.05 138.35 135.50 133.30
 1/ 1.2500  .4260  .3750 3 4  5/ 251140 144.55 1.1906 1.2530 180.40 162.45 156.50 153.55 150.50 148.05
 5/16 1.3125  .4260  .3750 3 4  5/ 251142 154.90 1.2531 1.3155 190.90 172.85 166.95 163.95 160.95 158.45
 3/ 1.3750  .4260  .3750 3 4  5/ 251144 162.35 1.3156 1.3780 198.20 180.30 174.30 171.35 168.35 165.85
 7/16 1.4375  .4260  .3750 4 4  7/ 251146 180.55 1.3781 1.4405 219.65 200.15 193.55 190.40 187.10 184.40
 1/ 1.5000  .4260  .3750 4 4  7/ 251148 207.80 1.4406 1.5030 248.30 228.05 221.30 217.95 214.60 211.75
 9/16 1.5625  .4890  .4375 4 4  1/ 251150 223.25 1.5031 1.5660 265.65 244.50 237.50 233.90 230.35 227.50
 5/ 1.6250  .4890  .4375 4 4  1/ 251152 227.25 1.5661 1.6280 269.65 248.50 241.45 237.90 234.30 231.50
11/16 1.6875  .4890  .4375 4 4  1/ 251154 271.90 1.6281 1.6910 317.75 294.85 287.25 283.45 279.55 276.45
 3/ 1.7500  .4890  .4375 4 4  1/ 251156 271.90 1.6911 1.7530 317.75 294.85 287.25 283.45 279.55 276.45
13/16 1.8125  .4890  .4375 4 4  1/ 251158 321.85 1.7531 1.8160 367.60 344.75 337.10 333.30 329.45 326.25
 7/ 1.8750  .4890  .4375 4 4  1/ 251160 321.85 1.8161 1.8780 367.60 344.75 337.10 333.30 329.45 326.25
15/16 1.9375  .4890  .4375 4 4  1/ 251162 351.60 1.8781 1.9410 397.45 374.55 366.85 363.15 359.30 356.10
        2.0000  .5510  .5000 4 4  3/ 251164 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 Steel Cutting - Taper Shank Counterbores you need?
If the above dimensions do not meet your specific Steel Cutting - Taper Shank Counterbores needs we may be able to make modifications to one of the above Steel Cutting - 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 Steel Cutting - Taper Shank Counterbores you requested.
Thank you for using Rock River Tool for your Steel Cutting - Taper Shank Counterbores needs.