Max and Min Difference in Diamter (Gap) Min and Max Overlay
Diamter (inches) Tight slip fit Loose slip fit Least Press Force
Greatest
Min Max RC1 RC2 RC3 RC4 RC5 RC6 RC7 RC8 RC9 FN1 FN2 FN3 FN4
FN5
0.04 0.12 0.10 0.10 0.30 0.30 0.60 0.60 0.10 2.50 4.00 0.05 0.20
. 0.30 0.50
0.45 0.55 0.80 1.10 1.40 1.80 2.60 5.10 8.10 0.50 0.85 . 0.95
1.30
0.12 0.24 0.15 0.15 0.40 0.40 0.80 0.80 1.20 2.80 4.50 0.10 0.20
. 0.40 0.70
0.50 0.65 1.00 1.40 1.80 2.20 3.10 5.80 9.30 0.60 1.00 . 1.20
1.70
0.24 0.40 0.20 0.20 0.50 0.50 1.00 1.00 1.60 3.00 5.00 0.10 0.40
. 0.60 0.80
0.60 0.85 1.70 1.70 2.20 2.80 3.90 6.60 10.70 0.75 1.40 . 1.60
2.00
0.40 0.56 0.25 0.25 0.60 0.60 1.20 1.20 2.00 3.50 3.00 0.10 0.50
. 0.70 0.90
0.75 0.95 2.00 2.00 2.60 3.20 4.60 7.90 12.80 0.80 1.60 . 1.80
2.30
0.56 0.71 0.25 0.25 0.60 0.60 1.20 1.20 2.00 3.50 3.00 0.20 0.50
. 0.70 1.10
0.75 0.95 2.00 2.00 2.60 3.20 4.60 7.90 12.80 0.90 1.60 . 1.80
2.50
0.71 0.95 0.3 0.3 0.8 0.8 1.6 1.6 2.5 4.5 7.0 0.2 0.6 . 0.8
1.4
1.0 1.2 1.8 2.4 3.2 4.0 5.7 10.0 15.5 1.1 1.9 . 2.1 3.0
0.95 1.19 0.3 0.3 0.8 0.8 1.6 1.6 2.5 4.5 7.0 0.3 0.6 0.8 1.0
1.7
1.0 1.2 1.8 2.4 3.2 4.0 5.7 10.0 15.5 1.2 1.9 2.1 2.3 3.3
1.19 1.58 0.4 0.4 1.0 1.0 2.0 2.0 3.0 5.0 8.0 0.3 0.8 0.8 1.5
2.0
1.1 1.4 2.2 3.0 4.0 5.2 7.1 11.5 18.0 1.3 2.4 2.4 3.1 4.0
1.58 1.97 0.4 0.4 1.0 1.0 2.0 2.0 3.0 5.0 8.0 0.4 0.8 1.2 1.8
3.0
1.1 1.4 2.2 3.0 4.0 5.2 7.1 11.5 18.0 1.4 2.4 2.8 3.4 5.0
1.97 2.56 0.4 0.4 1.2 1.2 2.5 2.5 4.0 6.0 9.0 0.6 0.8 1.3 2.3
3.8
1.2 1.6 2.6 3.6 4.9 6.1 8.8 13.5 20.5 1.8 2.7 3.2 4.2 6.2
2.56 3.15 0.4 0.4 1.2 1.2 2.5 2.5 4.0 6.0 9.0 0.7 1.0 1.8 2.8
4.8
1.2 1.6 2.6 3.6 4.9 6.1 8.8 13.5 20.5 1.9 2.9 3.7 4.7 7.2
3.15 3.94 0.5 0.5 1.4 1.4 3.0 3.0 5.0 7.0 10.0 0.9 1.4 2.1 3.6
5.6
1.5 2.0 3.2 4.2 5.8 7.4 10.7 15.5 24.0 2.4 3.7 4.4 5.9 8.4
3.94 4.73 0.5 0.5 1.4 1.4 3.0 3.0 5.0 7.0 10.0 1.1 1.6 2.6 4.6
6.6
1.5 2.0 3.2 4.2 5.8 7.4 10.7 15.5 24.0 2.6 3.9 4.9 6.9 9.4
4.73 5.52 0.6 0.6 1.6 1.6 3.5 3.5 6.0 8.0 12.0 1.2 1.9 3.4 5.4
8.4
1.8 2.3 3.6 4.8 6.7 8.5 12.5 18.0 28.0 2.9 4.5 6.0 8.0 11.6
5.52 6.30 0.6 0.6 1.6 1.6 3.5 3.5 6.0 8.0 12.0 1.5 2.4 3.4 5.4
10.4
1.8 2.3 3.6 4.8 6.7 8.5 12.5 18.0 28.0 3.2 5.0 6.0 8.0 13.6
6.30 7.09 0.6 0.6 1.6 1.6 3.5 3.5 6.0 8.0 12.0 1.8 2.9 4.4 6.4
10.4
1.8 2.3 3.6 4.8 6.7 8.5 12.5 18.0 28.0 3.5 5.5 7.0 9.0 13.6
7.09 7.88 0.6 0.6 2.0 2.0 4.0 4.0 7.0 10.0 15.0 1.8 3.2 5.2 7.2
12.2
2.0 2.6 4.4 5.6 7.6 9.6 14.3 21.5 34.0 3.8 6.2 8.2 10.2 15.8
7.88 8.86 0.6 0.6 2.0 2.0 4.0 4.0 7.0 10.0 15.0 2.3 3.2 5.2 8.2
14.2
2.0 2.6 4.4 5.6 7.6 9.6 14.3 21.5 34.0 4.3 6.2 8.2 11.2 17.8
8.86 9.85 0.6 0.6 2.0 2.0 4.0 4.0 7.0 10.0 15.0 2.3 4.0 6.2 10.0
14.2
2.0 2.6 4.4 5.6 7.6 9.6 14.3 21.5 34.0 4.3 7.2 9.2 13.2 17.8
9.85 11.03 0.8 0.8 2.5 2.5 5.0 5.0 8.0 12.0 18.0 2.8 4.2 7.0
10.2 16.0
2.3 2.9 4.9 6.5 9.0 11.0 13.0 25.0 38.0 4.9 7.2 10.2 13.2
20.0
11.03 12.41 0.8 0.8 2.5 2.5 5.0 5.0 8.0 12.0 18.0 2.8 5.0 7.0
12.0 18.0
2.3 2.9 4.9 6.5 9.0 11.0 13.0 25.0 38.0 4.9 8.2 10.2 15.2
22.0
12.41 13.98 1.0 1.0 3.0 3.0 6.0 6.0 10.0 14.0 22.0 3.1 5.8 7.8
13.8 19.8
2.7 3.4 5.8 7.4 10.4 13.0 19.5 29.0 45.0 5.5 9.4 11.4 17.4
24.2
13.98 15.75 1.0 1.0 3.0 3.0 6.0 6.0 10.0 14.0 22.0 3.6 5.8 9.8
15.8 22.8
2.7 3.4 5.8 7.4 10.4 13.0 19.5 29.0 45.0 6.1 9.4 13.4 19.4
27.2
15.75 17.72 1.2 1.2 4.0 4.0 8.0 8.0 12.0 16.0 25.0 4.4 6.5 9.5
17.5 25.5
3.0 3.8 7.2 9.0 13.0 16.0 22.0 32.0 51.0 7.0 10.6 136.0 21.6
30.5
17.72 19.69 1.2 1.2 4.0 4.0 8.0 8.0 12.0 16.0 25.0 4.4 7.5 11.5
19.5 27.5
3.0 3.8 7.2 9.0 13.0 16.0 22.0 32.0 51.0 7.0 11.6 15.6 23.6
32.5
Values of overlay and gap are in thousandths of an inch
(.00x)
Slip Fit Info Tight Slip Fit RC1 Really tight slip fit used for
accurate location of parts. RC2 Sliding fit that can turn easily
and is used for accurate location. Not intended to run freely and
may seize with temperature. RC3 closest fits that can run freely
and used as a light journal entry at low speeds. RC4 close running
fits, used on accurate machinery with moderate surface speeds. RC5
and RC6 Medium running fits intended for higher running speeds and
or heavy journal pressures. RC7 Free running fits where accuracy is
not essential or where large temperature variations are likely to
be encountered. RC8 and RC9 Loos running fits that is intended for
use were wider commercial tolerances may be necessary. Loose Slip
Fit
Press and Shrink Fit Info Least overlap FN1 Light drive fit for
light assembly pressures and are less permanent of assembly. FN2
Medium drive fit for ordinary steel parts. These are about the
tightest fits to be used with high grade cast iron members. FN3
Heavy drive fits that are used for heaver steel parts FN4 and FN5
Highest stress on material, and should only be used if FN3 cant
work. Most overlap
Specific Tolerances