ISO Tolerances

Nominal Dimension		Tolerance Zone in mm (External Measurements)
over	to	m6	h6	h8	h10	h11	h13	h14	h15	h16
0	1	+0.002 +0.008	0 -0.006	0 -0.014	0 -0.040	0 -0.060	0 -0.14
1	3	+0.002 +0.008	0 -0.006	0 -0.014	0 -0.040	0 -0.060	0 -0.14	0 -0.25	0 -0.40	0 -0.60
3	6	+0.004 +0.012	0 -0.008	0 -0.018	0 -0.048	0 -0.075	0 -0.18	0 -0.30	0 -0.48	0 -0.75
6	10	+0.006 +0.015	0 -0.009	0 -0.022	0 -0.058	0 -0.090	0 -0.22	0 -0.36	0 -0.58	0 -0.90
10	18	+0.007 +0.018	0 -0.011	0 -0.027	0 -0.070	0 -0.110	0 -0.27	0 -0.43	0 -0.70	0 -1.10
18	30	+0.008 +0.021	0 -0.030	0 -0.033	0 -0.084	0 -0.130	0 -0.33	0 -0.52	0 -0.84	0 -1.30
30	50						0 -0.39	0 -0.62	0 -1.00	0 -1.60
50	80						0 -0.46	0 -0.74	0 -1.20	0 -1.90
80	120						0 -0.54	0 -0.87	0 -1.40	0 -2.20

 

Nominal Dimension		Tolerance Zone in mm (External Measurements)
over	to	js14	js15	js16	js17
1	3	+0.125	+0.20	+0.30	+0.50
3	6	+0.15	+0.24	+0.375	+0.60
6	10	+0.18	+0.29	+0.45	+0.75
10	18	+0.215	+0.35	+0.55	+0.90
18	30	+0.26	+0.42	+0.65	+1.05
30	50	+0.31	+0.50	+0.80	+1.25
50	80	+0.37	+0.60	+0.95	+1.50
80	120	+0.435	+0.70	+1.10	+1.75
120	180	+0.50	+0.80	+1.25	+2.00
180	250	+0.575	+0.925	+1.45	+2.30
250	315	+0.65	+1.05	+1.60	+2.60
315	400	+0.70	+1.15	+1.80	+2.85
400	500	+0.775	+1.25	+2.00	+3.15

 

Nominal Dimension		Tolerance Zone in mm (Internal Measurements)
over	to	H7	H8	H9	H11	H13	H14
0	1	+0.010 0	+0.014 0	+0.025 0	+0.060 0	+0.14 0
1	3	+0.010 0	+0.014 0	+0.025 0	+0.060 0	+0.14 0	+0.25 0
3	6	+0.012 0	+0.018 0	+0.030 0	+0.075 0	+0.18 0	+0.30 0
6	10	+0.015 0	+0.022 0	+0.036 0	+0.090 0	+0.22 0	+0.36 0
10	18	+0.018 0	+0.027 0	+0.043 0	+0.110 0	+0.27 0	+0.43 0
18	30	+0.021 0	+0.033 0	+0.052 0	+0.130 0	+0.33 0	+0.52 0
30	50					+0.39 0	+0.62 0
50	80					+0.46 0	+0.74 0
80	120					+0.54 0	+0.87 0

Example limits and fits using hole basis

Description	Hole	Shaft
Loose Running	H11	c11
Free Running	H9	d9
Loose Running	H11	c11
Easy Running - Good quality easy to do-	H8	f8
Sliding	H7	g6
Close Clearance - Spigots and locations	H8	f7
Location/Clearance	H7	h6
Location- slight interference	H7	k6
Location/Transition	H7	n6
Location/Interference- Press fit which can be separated	H7	p6
Medium Drive	H7	s6
Force	H7	u6

Machining Process associated with ISO IT Tolerance Grade..

   

IT Grade	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Lapping
Honing
Superfinishing
Cylinderical grinding
Diamond turning
Plan grinding
Broaching
Reaming
Boring, Turning
Sawing
Milling
Planing, Shaping
Extruding
Cold Rolling, Drawing
Drilling
Die Casting
Forging
Sand Casting
Hot rolling, Flame cutting

*All information is strictly informative