REAMERS
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NAS 897
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Left Spiral Flutes
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Straight Shank
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Cast Iron
FRACTIONAL TYPE 3437 - STRAIGHT SHANK - LEFT SPIRAL FLUTES - FOR CAST IRON
TYPE 3437
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  343706 $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         343707 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         34372344 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         343708 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         343709 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         343710 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         343711 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         343712 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         343713 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         343714 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         343715 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         343716 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         343717 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         343718 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         343719 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         343720 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         343721 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         343722 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         343723 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  343724 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  343725 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  343726 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  343727 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         343728 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         343729 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         343730 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         343731 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  343732 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  343734 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         343736 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         343738 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  343740 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  343742 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         343744 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         343746 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  343748 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.