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Reference Chart

Tolerance Fit Chart

Find hole and shaft tolerances for clearance, transition, and interference fits. Covers RC, LC, LT, LN, and FN fit classes for nominal sizes 0.5" to 3.0".

Showing 24 of 24 fits
Nominal Size (in) ▲Fit Type ▲Hole Tolerance ▲Shaft Tolerance ▲Min Clear./Interf. ▲Max Clear./Interf. ▲
0.5"RC1 (Close sliding)+0.0000 / +0.0004-0.0002 / -0.0004+0.0002+0.0008
0.5"RC4 (Running)+0.0000 / +0.0007-0.0005 / -0.0010+0.0005+0.0017
0.5"RC7 (Free running)+0.0000 / +0.0012-0.0010 / -0.0019+0.0010+0.0031
0.5"LC2 (Locational)+0.0000 / +0.0004-0.0000 / -0.0004+0.0000+0.0008
1.0"RC1 (Close sliding)+0.0000 / +0.0005-0.0003 / -0.0005+0.0003+0.0010
1.0"RC4 (Running)+0.0000 / +0.0008-0.0006 / -0.0012+0.0006+0.0020
1.0"RC7 (Free running)+0.0000 / +0.0014-0.0012 / -0.0023+0.0012+0.0037
1.0"LC2 (Locational)+0.0000 / +0.0005-0.0000 / -0.0005+0.0000+0.0010
2.0"RC1 (Close sliding)+0.0000 / +0.0006-0.0003 / -0.0006+0.0003+0.0012
2.0"RC4 (Running)+0.0000 / +0.0010-0.0007 / -0.0014+0.0007+0.0024
2.0"RC7 (Free running)+0.0000 / +0.0016-0.0014 / -0.0027+0.0014+0.0043
3.0"RC4 (Running)+0.0000 / +0.0012-0.0008 / -0.0016+0.0008+0.0028
0.5"LT1 (Locational trans.)+0.0000 / +0.0004+0.0002 / -0.0002-0.0002+0.0006
0.5"LT3 (Locational trans.)+0.0000 / +0.0006+0.0004 / -0.0002-0.0004+0.0008
1.0"LT1 (Locational trans.)+0.0000 / +0.0005+0.0002 / -0.0003-0.0002+0.0008
1.0"LT3 (Locational trans.)+0.0000 / +0.0007+0.0005 / -0.0002-0.0005+0.0009
2.0"LT1 (Locational trans.)+0.0000 / +0.0006+0.0003 / -0.0003-0.0003+0.0009
3.0"LT1 (Locational trans.)+0.0000 / +0.0007+0.0003 / -0.0004-0.0003+0.0011
0.5"LN2 (Locational interf.)+0.0000 / +0.0004+0.0006 / +0.0002-0.0006+0.0002
0.5"FN2 (Medium drive)+0.0000 / +0.0004+0.0010 / +0.0006-0.0010-0.0002
1.0"FN2 (Medium drive)+0.0000 / +0.0005+0.0013 / +0.0008-0.0013-0.0003
1.0"FN4 (Force fit)+0.0000 / +0.0005+0.0023 / +0.0018-0.0023-0.0013
2.0"FN2 (Medium drive)+0.0000 / +0.0006+0.0017 / +0.0011-0.0017-0.0005
3.0"FN2 (Medium drive)+0.0000 / +0.0007+0.0020 / +0.0013-0.0020-0.0006
No fits match your search. Try a different term or filter.

Notes on This Chart

  • Tolerances follow ANSI B4.1 standard for preferred limits and fits.
  • Positive clearance means the hole is larger. Negative means interference (shaft is larger).
  • RC = Running/Clearance. LC = Locational Clearance. LT = Locational Transition. LN = Locational Interference. FN = Force/Shrink.
  • Always verify fit calculations with your specific nominal size range in the full ANSI tables.

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Frequently Asked Questions

What is a clearance fit?

A clearance fit means the hole is always larger than the shaft. The parts slide or rotate freely. RC and LC are clearance fits. Use them for shafts that need to spin or slide.

What is a press fit?

A press fit means the shaft is larger than the hole. You need force to push them together. FN fits are press fits. The interference holds the parts in place without fasteners. Use them for bearings, pins, and permanent assemblies.

What is a transition fit?

A transition fit can result in slight clearance or slight interference. LT fits are transition fits. They give accurate location without a full press. Use them for alignment pins and locating features.

How do I choose the right fit class?

Start with the function. If parts must spin freely, use RC. If parts must stay put, use FN. If you need accurate location with easy assembly, use LC or LT. Tighter fits cost more to machine. Only use tight fits where the design requires them.

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