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*
   1/4   .2500  .1140  .0938 1 3 3 13/16 251108 $93.75  .2381  .2530 $139.00 $116.40 $108.85 $105.10 $101.30 $98.20
   9/32  .2813  .1140  .0938 1 3 3 13/16 251109 112.85  .2531  .2840 157.95 135.30 127.80 124.10 120.40 117.15
   5/16  .3125  .1140  .0938 1 3 3 13/16 251110 96.35  .2841  .3150 138.80 117.55 110.55 107.05 103.40 100.50
  11/32  .3438  .1140  .0938 1 3 3 13/16 251111 118.75  .3151  .3470 161.20 139.90 132.80 129.35 125.75 122.85
   3/8   .3750  .1820  .1563 1 3 4  1/16 251112 99.50  .3471  .3780 138.50 119.05 112.45 109.30 106.00 103.35
  13/32  .4063  .1820  .1563 1 3 4  1/16 251113 112.35  .3781  .4090 151.50 131.90 125.45 122.15 118.90 116.20
   7/16  .4375  .1820  .1563 1 3 4  1/16 251114 102.15  .4091  .4410 141.20 121.70 115.15 112.00 108.70 106.00
  15/32  .4688  .2280  .1875 1 3 4  5/16 251115 124.05  .4411  .4720 163.15 143.55 137.05 133.85 130.60 127.90
   1/2   .5000  .2280  .1875 1 3 4  5/16 251116 112.80  .4721  .5030 152.00 132.35 125.75 122.70 119.25 116.60
  17/32  .5313  .2280  .1875 1 3 4  5/16 251117 121.75  .5031  .5340 159.45 140.60 134.30 131.25 128.00 125.45
   9/16  .5625  .2280  .1875 1 3 4  5/16 251118 110.70  .5341  .5660 148.45 129.50 123.30 120.05 117.00 114.35
  19/32  .5938  .2280  .1875 2 3 5  1/8  251119 125.05  .5661  .5970 162.75 143.95 137.65 134.50 131.40 128.70
   5/8   .6250  .2280  .1875 2 3 5  1/8  251120 113.65  .5971  .6280 151.40 132.55 126.25 123.20 119.90 117.35
  21/32  .6563  .2280  .1875 2 3 5  1/8  251121 132.00  .6281  .6590 169.70 150.85 144.55 141.45 138.25 135.75
  11/16  .6875  .2280  .1875 2 3 5  1/8  251122 119.90  .6591  .6910 157.70 138.80 132.55 129.35 126.25 123.55
  23/32  .7188  .2900  .2500 2 3 5  3/8  251123 134.20  .6911  .7220 171.95 153.10 146.85 143.70 140.55 137.95
   3/4   .7500  .2900  .2500 2 3 5  3/8  251124 122.00  .7221  .7530 159.65 140.75 134.50 131.45 128.15 125.60
  25/32  .7813  .2900  .2500 2 3 5  3/8  251125 136.50  .7531  .7840 174.15 155.35 149.05 145.85 142.75 140.15
  13/16  .8125  .2900  .2500 2 3 5  3/8  251126 124.10  .7841  .8160 161.80 142.95 136.70 133.55 130.35 127.80
  27/32  .8438  .2900  .2500 2 3 5  3/8  251127 143.45  .8161  .8470 181.30 162.40 156.10 152.95 149.85 147.20
   7/8   .8750  .2900  .2500 2 3 5  3/8  251128 130.40  .8471  .8780 168.20 149.25 143.05 139.90 136.75 134.10
  29/32  .9063  .2900  .2500 3 3 6  1/8  251129 147.40  .8781  .9090 185.05 166.20 160.00 156.80 153.70 151.10
  15/16  .9375  .2900  .2500 3 3 6  1/8  251130 133.95  .9091  .9410 171.65 152.80 146.50 143.40 140.30 137.70
  31/32  .9688  .3530  .3125 3 3 6  3/8  251131 150.80  .9411  .9720 188.45 169.65 163.35 160.25 156.95 154.45
1         1.0000  .3530  .3125 3 3 6  3/8  251132 142.25  .9721 1.0030 181.50 161.90 155.35 152.15 148.70 146.15
1  1/16 1.0625  .3530  .3125 3 3 6  3/8  251134 144.15 1.0031 1.0660 183.20 163.65 157.15 153.90 150.60 147.95
1  1/8  1.1250  .3530  .3125 3 3 6  3/8  251136 148.65 1.0661 1.1280 187.85 168.35 161.75 158.50 155.20 152.55
1  3/16 1.1875  .3530  .3125 3 3 6  3/8  251138 153.75 1.1281 1.1905 193.00 173.40 166.80 163.60 160.25 157.65
1  1/4  1.2500  .4260  .3750 3 4 6  5/8  251140 170.95 1.1906 1.2530 213.35 192.10 185.05 181.60 178.00 175.10
1  5/16 1.3125  .4260  .3750 3 4 6  5/8  251142 183.20 1.2531 1.3155 225.75 204.45 197.45 193.85 190.35 187.40
1  3/8  1.3750  .4260  .3750 3 4 6  5/8  251144 192.00 1.3156 1.3780 234.40 213.20 206.15 202.65 199.05 196.10
1  7/16 1.4375  .4260  .3750 4 4 7  7/8  251146 213.50 1.3781 1.4405 259.75 236.70 228.90 225.20 221.25 218.05
1  1/2  1.5000  .4260  .3750 4 4 7  7/8  251148 245.70 1.4406 1.5030 293.60 269.70 261.70 257.75 253.75 250.45
1  9/16 1.5625  .4890  .4375 4 4 8  1/8  251150 264.00 1.5031 1.5660 314.15 289.15 280.85 276.60 272.45 269.05
1  5/8  1.6250  .4890  .4375 4 4 8  1/8  251152 268.75 1.5661 1.6280 318.85 293.90 285.50 281.35 277.10 273.75
1 11/16 1.6875  .4890  .4375 4 4 8  1/8  251154 321.55 1.6281 1.6910 375.75 348.70 339.70 335.25 330.60 326.90
1  3/4  1.7500  .4890  .4375 4 4 8  1/8  251156 321.55 1.6911 1.7530 375.75 348.70 339.70 335.25 330.60 326.90
1 13/16 1.8125  .4890  .4375 4 4 8  1/8  251158 380.60 1.7531 1.8160 434.70 407.70 398.65 394.15 389.60 385.80
1  7/8  1.8750  .4890  .4375 4 4 8  1/8  251160 380.60 1.8161 1.8780 434.70 407.70 398.65 394.15 389.60 385.80
1 15/16 1.9375  .4890  .4375 4 4 8  1/8  251162 415.85 1.8781 1.9410 470.05 442.95 433.85 429.45 424.90 421.15
2         2.0000  .5510  .5000 4 4 8  3/8  251164 415.85 1.9411 2.0030 470.05 442.95 433.85 429.45 424.90 421.15
* 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.
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