REAMERS
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NAS 897
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Left Spiral Flutes
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Straight Shank
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Steel
FRACTIONAL TYPE 3439 - STRAIGHT SHANK - LEFT SPIRAL FLUTES - FOR STEEL
TYPE 3439
Carbide tips brazed to one piece hardened alloy steel bodies. Left spiral polished flutes.
Left spiral flutes should only be used on through holes and very hard materials. Finishes are much better as spiral flutes tend to bridge interruptions such as keyways, slots or intersecting holes. NAS 897 chucking reamers manufactured to national aerospace standards 897 C with partial flute length carbide. Tool geometry and carbide grade appropriate for material being machined.
Shanks are ground to the next smallest shank diameter listed in NAS 897 if tool diameter is within .005" of shank diameter.
TOOL DIAMETER MAX
SHANK
DIAM.		 NO.
OF
FLTS.		 LENGTH EDP
NO.		 PRICE
EACH		 DECIMAL
SIZE RANGE		 PRICE EACH - FINISHED TO DECIMAL SIZE
DEC. FRAC. FLT CARB OAL 1 PC. 2 PC. 3 PC. 4 PC. 5-7 8-14*
 .1875    3/16  .1805 4 1  1/8     1/2  4  1/2  343906 $64.75  .1770 -  .2040 $103.10 $83.85 $77.50 $74.40 $71.10 $68.55
 .2188    7/32  .2075 4 1  1/4     1/2  5         343907 64.75  .2041 -  .2210 103.10 83.85 77.50 74.40 71.10 68.55
 .2344   15/64  .2265 4 1  1/2     1/2  6         34392344 64.75  .2211 -  .2380 103.10 83.85 77.50 74.40 71.10 68.55
 .2500    1/4   .2405 4 1  1/2     1/2  6         343908 64.75  .2381 -  .2530 103.10 83.85 77.50 74.40 71.10 68.55
 .2812    9/32  .2485 4 1  1/2     1/2  6         343909 64.90  .2531 -  .2840 103.25 84.05 77.65 74.55 71.25 68.65
 .3125    5/16  .2792 4 1  1/2     1/2  6         343910 64.90  .2841 -  .3150 103.25 84.05 77.65 74.55 71.25 68.65
 .3438   11/32  .2792 4 1  1/2     5/8  6         343911 71.45  .3151 -  .3470 109.85 90.65 84.20 81.15 77.85 75.25
 .3750    3/8   .3105 4 1  3/4     5/8  7         343912 72.10  .3471 -  .3780 110.45 91.30 84.85 81.75 78.45 75.90
 .4062   13/32  .3105 4 1  3/4     5/8  7         343913 75.30  .3781 -  .4090 113.70 94.50 88.05 85.00 81.70 79.10
 .4375    7/16  .3730 6 1  3/4     5/8  7         343914 78.25  .4091 -  .4410 116.55 97.35 90.95 87.90 84.55 82.05
 .4688   15/32  .3730 6 1  3/4     5/8  7         343915 83.25  .4411 -  .4720 121.60 102.40 95.95 92.90 89.60 87.00
 .5000    1/2   .4355 6 2            5/8  8         343916 86.30  .4721 -  .5030 125.65 105.90 99.35 96.20 92.80 90.15
 .5312   17/32  .4355 6 2            5/8  8         343917 88.90  .5031 -  .5340 128.25 108.50 101.90 98.75 95.40 92.75
 .5625    9/16  .4355 6 2            5/8  8         343918 88.90  .5341 -  .5660 128.25 108.50 101.90 98.75 95.40 92.75
 .5938   19/32  .4355 6 2            5/8  8         343919 91.65  .5661 -  .5970 130.95 111.25 104.65 101.50 98.15 95.50
 .6250    5/8   .5615 6 2  1/4     5/8  9         343920 91.65  .5971 -  .6280 130.95 111.25 104.65 101.50 98.15 95.50
 .6562   21/32  .5615 6 2  1/4     5/8  9         343921 94.35  .6281 -  .6590 133.70 113.95 107.40 104.25 100.85 98.20
 .6875   11/16  .5615 6 2  1/4     5/8  9         343922 100.30  .6591 -  .6910 139.65 120.00 113.35 110.20 106.80 104.15
 .7188   23/32  .5615 6 2  1/4     5/8  9         343923 101.85  .6911 -  .7220 141.20 121.45 114.85 111.70 108.35 105.70
 .7500    3/4   .6245 6 2  1/2     3/4  9  1/2  343924 103.25  .7221 -  .7530 142.65 122.90 116.35 113.20 109.85 107.15
 .7812   25/32  .6245 6 2  1/2     3/4  9  1/2  343925 106.10  .7531 -  .7840 145.45 125.70 119.15 116.00 112.65 109.95
 .8125   13/16  .6245 6 2  1/2     3/4  9  1/2  343926 106.10  .7841 -  .8160 145.45 125.70 119.15 116.00 112.65 109.95
 .8438   27/32  .6245 6 2  1/2     3/4  9  1/2  343927 111.70  .8161 -  .8470 151.15 131.40 124.75 121.65 118.25 115.55
 .8750    7/8   .7495 6 2  5/8     3/4  10         343928 111.70  .8471 -  .8780 151.15 131.40 124.75 121.65 118.25 115.55
 .9062   29/32  .7495 6 2  5/8     3/4  10         343929 130.20  .8781 -  .9090 169.55 149.80 143.20 140.05 136.70 134.05
 .9375   15/16  .7495 8 2  5/8     3/4  10         343930 130.20  .9091 -  .9410 169.55 149.80 143.20 140.05 136.70 134.05
 .9688   31/32  .7495 8 2  5/8     3/4  10         343931 136.50  .9411 -  .9720 175.90 156.15 149.60 146.45 143.10 140.40
1.0000 1          .8745 8 2  3/4     3/4  10  1/2  343932 136.50  .9721 - 1.0030 175.90 156.15 149.60 146.45 143.10 140.40
1.0625 1  1/16  .8745 8 2  3/4     3/4  10  1/2  343934 146.50 1.0031 - 1.0660 185.85 166.20 159.55 156.40 153.00 150.35
1.1250 1  1/8   .8745 8 2  7/8     7/8  11         343936 151.00 1.0661 - 1.1280 190.40 170.65 164.10 160.95 157.55 154.90
1.1875 1  3/16  .9995 8 2  7/8     7/8  11         343938 158.70 1.1281 - 1.1905 198.05 178.30 171.70 168.55 165.20 162.55
1.2500 1  1/4   .9995 8 3            7/8  11  1/2  343940 168.00 1.1906 - 1.2530 207.35 187.65 181.00 177.95 174.50 171.85
1.3125 1  5/16  .9995 8 3            7/8  11  1/2  343942 185.85 1.2531 - 1.3155 225.25 205.50 198.95 195.80 192.35 189.75
1.3750 1  3/8   .9995 8 3  1/4     7/8  12         343944 203.55 1.3156 - 1.3780 242.95 223.25 216.65 213.50 210.15 207.50
1.4375 1  7/16  .9995 8 3  1/4     7/8  12         343946 215.75 1.3781 - 1.4405 255.10 235.40 228.75 225.60 222.25 219.60
1.5000 1  1/2  1.2495 8 3  1/2     7/8  12  1/2  343948 227.90 1.4406 - 1.5030 267.25 247.50 240.95 237.80 234.45 231.75
* Quantities of 15 or more: price of fractional size in same size range.