To order 270, 270L or 270P reamers, the order must be submitted via email to sales@maford.com. On-line order entry or EDI orders for these series will be rejected and the order not received.
Range Reamer Series 270 and 270L
270 Series - Straight flute standard reamer OD tolerance
270L Series - Right-hand cut, left-hand spiral flute for through-hole applications
All reamers above .0433” (1.09mm) are ground between centers for maximum concentricity
Series 270/270L OD Tolerance
|
Inch |
|
Metric (mm) |
|
DC |
Tolerance |
DC |
Tolerance |
|
< 3/8 |
+.0001/+.0003 |
< 9.52 |
+.0025/+.0076 |
|
> 3/8 |
+.0001/+.0004 |
> 9.52 |
+.0025/+.0102 |
Lead Chamfer Angle Tolerance
|
Inch |
|
Metric(mm) |
|
DC |
Tolerance |
DC |
Tolerance |
|
< .0433 |
44°-46° per side |
<1.09mm |
44°-46° per side |
|
.0434-.1280 |
42°-44° per side |
1.10mm-3.25mm |
42°-44° per side |
|
> .1281 |
44°-46° per side |
>3.26mm |
44°-46° per side |
How to build a tool number for 270 and 270L range reamers
All range reamer tool numbers are in decimal inch sizes
|
Series |
Size |
|
270 |
.2362" (6mm) |
|
8 digit tool no. - 27023620 |
|
|
|
Series |
Size |
|
270L |
.0567" |
|
8 digit tool no. 27005670L |
|
Series 270 |
Series 270L |
Shank DCONMS |
OAL |
Flute Length L |
NOF |
|
Diameter DC |
|
Inch |
mm |
Inch |
mm |
Inch |
mm |
Inch |
mm |
Inch |
mm |
|
.0135-.0200 |
00.34-0.50 |
.0135-.0200 |
0.34-0.50 |
.0135-.0433 are no longer a standard item.
Contact customer service for price and availability as
a special quoted item. 800.553.8024/563.391.6220 or sales@maford.com |
|
.0201-.0400 |
00.51-1.01 |
.0201-.0400 |
0.51-1.01 |
|
.0401-.0433 |
01.02-1.09 |
.0401-.0433 |
1.02-1.09 |
|
.0434-.0519 |
01.10-1.31 |
.0434-.0519 |
1.10-1.31 |
.043 |
1.09 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0520-.0590 |
01.32-1.49 |
.0520-.0590 |
1.32-1.49 |
.046 |
1.17 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0591-.0660 |
01.50-1.67 |
.0591-.0660 |
1.50-1.67 |
.058 |
1.47 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0661-.0740 |
01.68-1.87 |
.0661-.0740 |
1.68-1.87 |
.065 |
1.65 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0741-.0810 |
01.88-2.05 |
.0741-.0810 |
1.88-2.05 |
.073 |
1.85 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0811-.0890 |
02.06-2.26 |
.0811-.0890 |
2.06-2.26 |
.080 |
2.03 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0891-.0970 |
02.27-2.46 |
.0891-.0970 |
2.27-2.46 |
.088 |
2.24 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0971-.1050 |
02.47-2.66 |
.0971-.1050 |
2.47-2.66 |
.096 |
2.44 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1051-.1130 |
02.67-2.87 |
.1051-.1130 |
2.67-2.87 |
.104 |
2.64 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1131-.1210 |
02.88-3.07 |
.1131-.1210 |
2.88-3.07 |
.112 |
2.84 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1211-.1280 |
03.08-3.25 |
.1211-.1280 |
3.08-3.25 |
.120 |
3.05 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1281-.1360 |
03.26-3.45 |
.1281-.1360 |
3.26-3.45 |
.127 |
3.23 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1361-.1440 |
03.46-3.65 |
.1361-.1440 |
3.46-3.65 |
.135 |
3.43 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1441-.1520 |
03.66-3.86 |
.1441-.1520 |
3.66-3.86 |
.143 |
3.63 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1521-.1590 |
03.87-4.03 |
.1521-.1590 |
3.87-4.03 |
.151 |
3.84 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1591-.1670 |
04.04-4.24 |
.1591-.1670 |
4.04-4.24 |
.158 |
4.01 |
3 |
76 |
7/8 |
22 |
4 |
|
.1671-.1750 |
04.25-4.44 |
.1671-.1750 |
4.25-4.44 |
.166 |
4.22 |
3 |
76 |
7/8 |
22 |
4 |
|
.1751-.1830 |
04.45-4.64 |
.1751-.1830 |
4.45-4.64 |
.174 |
4.42 |
3 |
76 |
7/8 |
22 |
4 |
|
.1831-.1910 |
04.65-4.85 |
.1831-.1910 |
4.65-4.85 |
.182 |
4.62 |
3 |
76 |
7/8 |
22 |
4 |
|
.1911-.1990 |
04.86-5.05 |
.1911-.1990 |
4.86-5.05 |
.190 |
4.83 |
3 |
76 |
1 |
25.5 |
4 |
|
.1991-.2060 |
05.06-5.23 |
.1991-.2060 |
5.06-5.23 |
.198 |
5.03 |
3 |
76 |
1 |
25.5 |
4 |
|
.2061-.2140 |
05.24-5.43 |
.2061-.2140 |
5.24-5.43 |
.205 |
5.21 |
3 |
76 |
1 |
25.5 |
4 |
|
.2141-.2220 |
05.44-5.63 |
.2141-.2220 |
5.44-5.63 |
.213 |
5.41 |
3 |
76 |
1 |
25.5 |
4 |
|
.2221-.2300 |
05.64-5.84 |
.2221-.2300 |
5.64-5.84 |
.221 |
5.61 |
3 |
76 |
1 |
25.5 |
4 |
|
.2301-.2370 |
05.85-6.01 |
.2301-.2370 |
5.85-6.01 |
.229 |
5.82 |
3 |
76 |
1 |
25.5 |
4 |
|
.2371-.2450 |
06.02-6.22 |
.2371-.2450 |
6.02-6.22 |
.236 |
5.99 |
3 |
76 |
1 |
25.5 |
4 |
|
.2451-.2530 |
06.23-6.42 |
.2451-.2530 |
6.23-6.42 |
.244 |
6.20 |
3 |
76 |
1 |
25.5 |
4 |
|
.2531-.2710 |
06.43-6.88 |
.2531-.2710 |
6.43-6.88 |
.252 |
6.40 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.2711-.2860 |
06.89-7.26 |
.2711-.2860 |
6.89-7.26 |
.270 |
6.86 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.2861-.3020 |
07.27-7.67 |
.2861-.3020 |
7.27-7.67 |
.285 |
7.24 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.3021-.3180 |
07.68-8.07 |
.3021-.3180 |
7.68-8.07 |
.301 |
7.65 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.3181-.3330 |
08.08-8.45 |
.3181-.3330 |
8.08-8.45 |
.317 |
8.05 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3331-.3490 |
08.46-8.86 |
.3331-.3490 |
8.46-8.86 |
.332 |
8.43 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3491-.3640 |
08.87-9.24 |
.3491-.3640 |
8.87-9.24 |
.348 |
8.84 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3641-.3860 |
09.25-9.80 |
.3641-.3860 |
9.25-9.80 |
.363 |
9.22 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3681-.4150 |
09.81-10.54 |
|
|
.380 |
9.65 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.4151-.4450 |
10.55-11.30 |
|
|
.410 |
10.41 |
4 |
102 |
1-3/8 |
35 |
6 |
|
.4451-.4750 |
11.31-12.06 |
|
|
.440 |
11.18 |
4 |
102 |
1-3/8 |
35 |
6 |
|
.4751-.5100 |
12.07-12.95 |
|
|
.470 |
11.93 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5101-.5400 |
12.96-13.71 |
|
|
.505 |
12.83 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5401-.5700 |
13.72-14.47 |
|
|
.535 |
13.59 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5701-.6000 |
14.48-15.24 |
|
|
.565 |
14.35 |
4 |
102 |
1-3/4 |
44.5 |
6 |
|
.6001-.6350 |
15.25-16.13 |
|
|
.595 |
15.11 |
4 |
102 |
1-3/4 |
44.5 |
6 |
Range Reamer Series 270P
270P Series - Straight flute for high precision, tight tolerance holes
All reamers above .0433” (1.09mm) are ground between centers for maximum concentricity
Series 270P OD Tolerance
|
Inch |
|
DC |
Tolerance |
|
.0434-.2530 |
+.0001/+.0000 |
|
.2531-.6350 |
+.0002/+.0000 |
Lead Chamfer Angle Tolerance
|
Inch |
|
Metric(mm) |
|
DC |
Tolerance |
DC |
Tolerance |
|
.0434-.1280 |
42°-44° per side |
1.10mm-3.25mm |
42°-44° per side |
|
> .1281 |
44°-46° per side |
>3.26mm |
44°-46° per side |
How to build a tool number for 270P range reamers
All range reamer tool numbers are in decimal inch sizes
|
Series |
Size |
|
270P |
.2362" (6mm) |
|
8 digit tool no. - 27023620P |
|
|
|
Series |
Size |
|
270P |
.0567" |
|
8 digit tool no. - 27005670P |
|
Series 270P |
Shank DCONMS |
OAL |
Flute Length L |
NOF |
|
Diameter DC |
|
Inch |
mm |
Inch |
mm |
Inch |
mm |
Inch |
mm |
|
.0434-.0519 |
01.10-1.31 |
.043 |
1.09 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0520-.0590 |
01.32-1.49 |
.046 |
1.17 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0591-.0660 |
01.50-1.67 |
.058 |
1.47 |
1-1/2 |
38 |
3/8 |
9.5 |
4 |
|
.0661-.0740 |
01.68-1.87 |
.065 |
1.65 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0741-.0810 |
01.88-2.05 |
.073 |
1.85 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0811-.0890 |
02.06-2.26 |
.080 |
2.03 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0891-.0970 |
02.27-2.46 |
.088 |
2.24 |
2 |
51 |
1/2 |
12.5 |
4 |
|
.0971-.1050 |
02.47-2.66 |
.096 |
2.44 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1051-.1130 |
02.67-2.87 |
.104 |
2.64 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1131-.1210 |
02.88-3.07 |
.112 |
2.84 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1211-.1280 |
03.08-3.25 |
.120 |
3.05 |
2-1/2 |
64 |
5/8 |
16 |
4 |
|
.1281-.1360 |
03.26-3.45 |
.127 |
3.23 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1361-.1440 |
03.46-3.65 |
.135 |
3.43 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1441-.1520 |
03.66-3.86 |
.143 |
3.63 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1521-.1590 |
03.87-4.03 |
.151 |
3.84 |
2-1/2 |
64 |
3/4 |
19 |
4 |
|
.1591-.1670 |
04.04-4.24 |
.158 |
4.01 |
3 |
76 |
7/8 |
22 |
4 |
|
.1671-.1750 |
04.25-4.44 |
.166 |
4.22 |
3 |
76 |
7/8 |
22 |
4 |
|
.1751-.1830 |
04.45-4.64 |
.174 |
4.42 |
3 |
76 |
7/8 |
22 |
4 |
|
.1831-.1910 |
04.65-4.85 |
.182 |
4.62 |
3 |
76 |
7/8 |
22 |
4 |
|
.1911-.1990 |
04.86-5.05 |
.190 |
4.83 |
3 |
76 |
1 |
25.5 |
4 |
|
.1991-.2060 |
05.06-5.23 |
.198 |
5.03 |
3 |
76 |
1 |
25.5 |
4 |
|
.2061-.2140 |
05.24-5.43 |
.205 |
5.21 |
3 |
76 |
1 |
25.5 |
4 |
|
.2141-.2220 |
05.44-5.63 |
.213 |
5.41 |
3 |
76 |
1 |
25.5 |
4 |
|
.2221-.2300 |
05.64-5.84 |
.221 |
5.61 |
3 |
76 |
1 |
25.5 |
4 |
|
.2301-.2370 |
05.85-6.01 |
.229 |
5.82 |
3 |
76 |
1 |
25.5 |
4 |
|
.2371-.2450 |
06.02-6.22 |
.236 |
5.99 |
3 |
76 |
1 |
25.5 |
4 |
|
.2451-.2530 |
06.23-6.42 |
.244 |
6.20 |
3 |
76 |
1 |
25.5 |
4 |
|
.2531-.2710 |
06.43-6.88 |
.252 |
6.40 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.2711-.2860 |
06.89-7.26 |
.270 |
6.86 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.2861-.3020 |
07.27-7.67 |
.285 |
7.24 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.3021-.3180 |
07.68-8.07 |
.301 |
7.65 |
3-1/2 |
89 |
1-1/8 |
28.5 |
6 |
|
.3181-.3330 |
08.08-8.45 |
.317 |
8.05 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3331-.3490 |
08.46-8.86 |
.332 |
8.43 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3491-.3640 |
08.87-9.24 |
.348 |
8.84 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3641-.3860 |
09.25-9.80 |
.363 |
9.22 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.3681-.4150 |
09.81-10.54 |
.380 |
9.65 |
3-1/2 |
89 |
1-1/4 |
32 |
6 |
|
.4151-.4450 |
10.55-11.30 |
.410 |
10.41 |
4 |
102 |
1-3/8 |
35 |
6 |
|
.4451-.4750 |
11.31-12.06 |
.440 |
11.18 |
4 |
102 |
1-3/8 |
35 |
6 |
|
.4751-.5100 |
12.07-12.95 |
.470 |
11.93 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5101-.5400 |
12.96-13.71 |
.505 |
12.83 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5401-.5700 |
13.72-14.47 |
.535 |
13.59 |
4 |
102 |
1-1/2 |
38 |
6 |
|
.5701-.6000 |
14.48-15.24 |
.565 |
14.35 |
4 |
102 |
1-3/4 |
44.5 |
6 |
|
.6001-.6350 |
15.25-16.13 |
.595 |
15.11 |
4 |
102 |
1-3/4 |
44.5 |
6 |