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 $101.25  .2381  .2530 $150.10 $125.70 $117.55 $113.50 $109.40 $106.05
   9/32  .2813  .1140  .0938 1 3 3 13/16 251109 121.90  .2531  .2840 170.60 146.10 138.00 134.05 130.05 126.50
   5/16  .3125  .1140  .0938 1 3 3 13/16 251110 104.05  .2841  .3150 149.90 126.95 119.40 115.60 111.65 108.55
  11/32  .3438  .1140  .0938 1 3 3 13/16 251111 128.25  .3151  .3470 174.10 151.10 143.40 139.70 135.80 132.70
   3/8   .3750  .1820  .1563 1 3 4  1/16 251112 107.45  .3471  .3780 149.60 128.55 121.45 118.05 114.50 111.60
  13/32  .4063  .1820  .1563 1 3 4  1/16 251113 121.35  .3781  .4090 163.60 142.45 135.50 131.90 128.40 125.50
   7/16  .4375  .1820  .1563 1 3 4  1/16 251114 110.30  .4091  .4410 152.50 131.45 124.35 120.95 117.40 114.50
  15/32  .4688  .2280  .1875 1 3 4  5/16 251115 133.95  .4411  .4720 176.20 155.05 148.00 144.55 141.05 138.15
   1/2   .5000  .2280  .1875 1 3 4  5/16 251116 121.80  .4721  .5030 164.15 142.95 135.80 132.50 128.80 125.95
  17/32  .5313  .2280  .1875 1 3 4  5/16 251117 131.50  .5031  .5340 172.20 151.85 145.05 141.75 138.25 135.50
   9/16  .5625  .2280  .1875 1 3 4  5/16 251118 119.55  .5341  .5660 160.35 139.85 133.15 129.65 126.35 123.50
  19/32  .5938  .2280  .1875 2 3 5  1/8  251119 135.05  .5661  .5970 175.75 155.45 148.65 145.25 141.90 139.00
   5/8   .6250  .2280  .1875 2 3 5  1/8  251120 122.75  .5971  .6280 163.50 143.15 136.35 133.05 129.50 126.75
  21/32  .6563  .2280  .1875 2 3 5  1/8  251121 142.55  .6281  .6590 183.30 162.90 156.10 152.75 149.30 146.60
  11/16  .6875  .2280  .1875 2 3 5  1/8  251122 129.50  .6591  .6910 170.30 149.90 143.15 139.70 136.35 133.45
  23/32  .7188  .2900  .2500 2 3 5  3/8  251123 144.95  .6911  .7220 185.70 165.35 158.60 155.20 151.80 149.00
   3/4   .7500  .2900  .2500 2 3 5  3/8  251124 131.75  .7221  .7530 172.40 152.00 145.25 141.95 138.40 135.65
  25/32  .7813  .2900  .2500 2 3 5  3/8  251125 147.40  .7531  .7840 188.10 167.80 160.95 157.50 154.15 151.35
  13/16  .8125  .2900  .2500 2 3 5  3/8  251126 134.05  .7841  .8160 174.75 154.40 147.65 144.25 140.80 138.00
  27/32  .8438  .2900  .2500 2 3 5  3/8  251127 154.95  .8161  .8470 195.80 175.40 168.60 165.20 161.85 159.00
   7/8   .8750  .2900  .2500 2 3 5  3/8  251128 140.85  .8471  .8780 181.65 161.20 154.50 151.10 147.70 144.85
  29/32  .9063  .2900  .2500 3 3 6  1/8  251129 159.20  .8781  .9090 199.85 179.50 172.80 169.35 166.00 163.20
  15/16  .9375  .2900  .2500 3 3 6  1/8  251130 144.65  .9091  .9410 185.40 165.00 158.20 154.85 151.50 148.70
  31/32  .9688  .3530  .3125 3 3 6  3/8  251131 162.85  .9411  .9720 203.55 183.20 176.40 173.05 169.50 166.80
1         1.0000  .3530  .3125 3 3 6  3/8  251132 153.65  .9721 1.0030 196.00 174.85 167.80 164.30 160.60 157.85
1  1/16 1.0625  .3530  .3125 3 3 6  3/8  251134 155.70 1.0031 1.0660 197.85 176.75 169.70 166.20 162.65 159.80
1  1/8  1.1250  .3530  .3125 3 3 6  3/8  251136 160.55 1.0661 1.1280 202.90 181.80 174.70 171.20 167.60 164.75
1  3/16 1.1875  .3530  .3125 3 3 6  3/8  251138 166.05 1.1281 1.1905 208.45 187.25 180.15 176.70 173.05 170.25
1  1/4  1.2500  .4260  .3750 3 4 6  5/8  251140 184.65 1.1906 1.2530 230.40 207.45 199.85 196.15 192.25 189.10
1  5/16 1.3125  .4260  .3750 3 4 6  5/8  251142 197.85 1.2531 1.3155 243.80 220.80 213.25 209.35 205.60 202.40
1  3/8  1.3750  .4260  .3750 3 4 6  5/8  251144 207.35 1.3156 1.3780 253.15 230.25 222.65 218.85 214.95 211.80
1  7/16 1.4375  .4260  .3750 4 4 7  7/8  251146 230.60 1.3781 1.4405 280.55 255.65 247.20 243.20 238.95 235.50
1  1/2  1.5000  .4260  .3750 4 4 7  7/8  251148 265.35 1.4406 1.5030 317.10 291.30 282.65 278.35 274.05 270.50
1  9/16 1.5625  .4890  .4375 4 4 8  1/8  251150 285.10 1.5031 1.5660 339.30 312.30 303.30 298.75 294.25 290.55
1  5/8  1.6250  .4890  .4375 4 4 8  1/8  251152 290.25 1.5661 1.6280 344.35 317.40 308.35 303.85 299.25 295.65
1 11/16 1.6875  .4890  .4375 4 4 8  1/8  251154 347.25 1.6281 1.6910 405.80 376.60 366.90 362.05 357.05 353.05
1  3/4  1.7500  .4890  .4375 4 4 8  1/8  251156 347.25 1.6911 1.7530 405.80 376.60 366.90 362.05 357.05 353.05
1 13/16 1.8125  .4890  .4375 4 4 8  1/8  251158 411.05 1.7531 1.8160 469.50 440.30 430.55 425.70 420.75 416.65
1  7/8  1.8750  .4890  .4375 4 4 8  1/8  251160 411.05 1.8161 1.8780 469.50 440.30 430.55 425.70 420.75 416.65
1 15/16 1.9375  .4890  .4375 4 4 8  1/8  251162 449.10 1.8781 1.9410 507.65 478.40 468.55 463.80 458.90 454.85
2         2.0000  .5510  .5000 4 4 8  3/8  251164 449.10 1.9411 2.0030 507.65 478.40 468.55 463.80 458.90 454.85
* 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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