Procision Standard Tolerance

Procision Manufacturing offers hundreds of metal alloys and plastic resins to choose from for CNC machining, plastic injection molding and vacuum casting.

CNC Machining Tolerance

For CNC milling and turning we adhere to the standard tolerance classifications of ISO-2768-fine in both metal and plastic. If you need higher tolerances, simply contact us for a specialized service.

LIMITS FOR NOMINAL SIZES (in mm)

<=
0.50
3.00
3.00
6.00
6.00
30.00
30.00
120.00
120.00
400.00
400.00
1000.00
1000.00
2000.00
2000.00
4000.00
TOLERANCE
CLASS (±)
ffine0.050.050.100.150.200.300.50
mmedium0.100.100.200.300.500.801.202.00
ccoarse0.200.300.500.801.202.003.004.00
vvery coarse0.501.001.502.504.006.008.00

Plastic Injection Molding Tolerance

Below is a list of standard injection molding resin tolerances. Note that these are for reference only. You should always consult with us in advance so we can help you optimize dimensional specifications for your application.

Dimensional Tolerances ±mm

ToleranceCommercial TolerancePrecision Higher Cost
Dimension1 to 20
(+/-mm)
21 to 100
(+/-mm)
101 to 160
(+/-mm)
for each 20mm
over 160 add
1 to 20
(+/-mm)
21 to 100
(+/-mm)
ABS0.10.150.3250.080.050.1
ABS+GF200.10.150.3250.080.050.1
ASA0.10.150.3250.080.050.1
GPPS0.0750.150.3050.10.050.08
HDPE0.1250.170.3750.10.0750.11
LDPE0.1250.170.3750.10.0750.11
PA120.0750.160.310.080.030.13
PA60.0750.160.310.080.030.13
PA660.0750.160.310.080.030.13
PA+GF0.060.120.240.080.030.1
PA66+PTFE15+GF300.060.120.240.080.030.1
PA66/60.0750.160.310.080.030.13
PA66/6I/X0.0750.160.310.080.030.13
PBT0.0750.160.310.080.030.13
PBT+GF0.060.120.240.080.030.1
PC0.060.120.240.080.030.1
PC+ABS0.10.150.3250.080.050.1
PC+ASA0.10.150.3250.080.050.1
PC+GF0.050.10.20.080.030.08
PCTG0.070.130.260.080.040.09
PEEK0.060.120.240.080.030.09
PEEK+GF300.060.120.240.080.030.09
PEI0.060.120.240.080.030.09
PEI+GF0.060.120.240.080.030.09
PET+GF300.060.120.240.080.030.09
PETG0.070.130.260.080.040.09
PMMA0.0750.120.250.080.050.07
POM0.0750.160.310.080.030.13
PP0.1250.170.3750.10.0750.11
PPE/PPO0.10.150.3250.080.050.1
PPS+GF0.060.120.240.080.030.1
PPSU0.060.120.240.080.030.09
TPE0.150.20.40.120.10.15
TPEE0.150.20.40.120.10.15
TPU0.150.20.40.120.10.15
TPV0.150.20.40.120.10.15

Straightness/Flatness Tolerances ±mm

ToleranceCommercial TolerancePrecision Higher Cost
Dimension0-100
(+/-mm)
101-160
(+/-mm)
0-100
(+/-mm)
101-160
(+/-mm)
ABS0.380.80.250.5
ABS+GF200.380.80.250.5
ASA0.380.80.250.5
GPPS0.250.380.180.25
HDPE0.30.50.20.3
LDPE0.30.50.20.3
PA120.30.50.150.25
PA60.30.50.150.25
PA660.30.50.150.25
PA+GF0.150.20.080.1
PA66+PTFE15+GF300.150.20.080.1
PA66/60.30.50.150.25
PA66/6I/X0.30.50.150.25
PBT0.30.50.150.25
PBT+GF0.150.20.080.1
PC0.150.20.080.1
PC+ABS0.380.80.250.5
PC+ASA0.380.80.250.5
PC+GF0.130.180.080.1
PCTG0.20.350.10.18
PEEK0.130.180.080.12
PEEK+GF300.130.180.080.12
PEI0.130.180.080.12
PEI+GF300.130.180.080.12
PET+GF300.130.180.080.12
PETG0.20.350.10.18
PMMA0.180.330.10.16
POM0.30.50.150.25
PP0.851.50.50.85
PPE/PPO0.380.80.250.5
PPS+GF0.150.20.080.1
PPSU0.130.180.080.12

Hole Diameter Tolerance ±mm

ToleranceCommercial TolerancePrecision Higher Cost
Dimension0-3
(+/-mm)
3.1-6
(+/-mm)
6.1-14
(+/-mm)
14-40
(+/-mm)
0-3
(+/-mm)
3.1-6
(+/-mm)
6.1-14
(+/-mm)
14-40
(+/-mm)
ABS0.050.050.080.10.030.030.050.05
ABS+GF200.050.050.080.10.030.030.050.05
ASA0.050.050.080.10.030.030.050.05
GPPS0.050.050.050.090.030.030.040.05
HDPE0.050.080.10.150.030.050.050.08
LDPE0.050.080.10.150.030.050.050.08
PA120.050.080.080.130.030.040.050.08
PA60.050.080.080.130.030.040.050.08
PA660.050.080.080.130.030.040.050.08
PA+GF0.050.050.080.080.030.040.050.05
PA66+PTFE15+GF300.050.050.080.080.030.040.050.05
PA66/60.050.080.080.130.030.040.050.08
PA66/6I/X0.050.080.080.130.030.040.050.08
PBT0.050.080.080.130.030.040.050.08
PBT+GF0.050.050.080.080.030.040.050.05
PC0.050.050.080.080.030.040.050.05
PC+ABS0.050.050.080.10.030.030.050.05
PC+ASA0.050.050.080.10.030.030.050.05
PC+GF0.050.050.080.080.030.040.050.05
PCTG0.050.050.080.10.030.040.050.08
PEEK0.050.050.080.080.030.040.050.05
PEEK+GF300.050.050.080.080.030.040.050.05
PEI0.050.050.080.080.030.040.050.05
PEI+GF300.050.050.080.080.030.040.050.05
PET+GF300.050.050.080.080.030.040.050.05
PETG0.050.050.080.10.030.040.050.08
PMMA0.080.080.10.130.030.050.050.08
POM0.050.080.080.130.030.040.050.08
PP0.050.080.10.150.030.050.050.08
PPS+GF0.050.050.080.080.030.040.050.05
PPSU0.050.050.080.080.030.040.050.05

Blind Hole Depths Tolerances ±mm

ToleranceCommercial TolerancePrecision Higher Cost
Dimension1-6
(+/-mm)
6.1-14
(+/-mm)
Over 14
(+/-mm)
1-6
(+/-mm)
6.1-14
(+/-mm)
Over 14
(+/-mm)
ABS0.080.10.130.050.050.08
ABS+GF200.080.10.130.050.050.08
ASA0.080.10.130.050.050.08
GPPS0.090.10.130.050.050.08
HDPE0.10.120.150.050.080.1
LDPE0.10.120.150.050.080.1
PA120.10.10.130.050.080.1
PA60.10.10.130.050.080.1
PA660.10.10.130.050.080.1
PA+GF0.050.080.10.050.050.08
PA66+PTFE15+GF300.050.080.10.050.050.08
PA66/60.10.10.130.050.080.1
PA66/6I/X0.10.10.130.050.080.1
PBT0.10.10.130.050.080.1
PBT+GF0.050.080.10.050.050.08
PC0.050.080.10.050.050.08
PC+ABS0.080.10.130.050.050.08
PC+ASA0.080.10.130.050.050.08
PC+GF0.050.080.10.050.050.08
PCTG0.080.10.130.050.050.08
PEEK0.050.080.10.050.050.08
PEEK+GF300.050.080.10.050.050.08
PEI0.050.080.10.050.050.08
PEI+GF300.050.080.10.050.050.08
PET+GF300.050.080.10.050.050.08
PETG0.080.10.130.050.050.08
PMMA0.10.10.130.050.080.1
POM0.10.10.130.050.080.1
PP0.10.120.150.050.080.1
PPE/PPO0.080.10.130.050.050.08
PPS+GF0.050.080.10.050.050.08
PPSU0.050.080.10.050.050.08

Concentricity/Ovality Tolerances ±mm

ToleranceCommercial TolerancePrecision Higher Cost
Dimensionup to 100
(+/-mm)
up to 100
(+/-mm)
ABS0.230.13
ABS+GF200.230.13
ASA0.230.13
GPPS0.250.15
HDPE0.250.15
LDPE0.250.15
PA120.250.15
PA60.250.15
PA660.250.15
PA+GF0.150.1
PA66+PTFE15+GF300.150.1
PA66/60.250.15
PA66/6I/X0.250.15
PBT0.250.15
PBT+GF0.150.1
PC0.130.08
PC+ABS0.230.13
PC+ASA0.230.13
PC+GF0.130.08
PCTG0.130.08
PEEK0.120.07
PEEK+GF300.120.07
PEI0.120.07
PEI+GF300.120.07
PET+GF300.120.07
PETG0.130.08
PMMA0.250.15
POM0.250.15
PP0.250.15
PPE/PPO0.230.13
PPS+GF0.130.08
PPSU0.120.07

polyurethane vacuum casting Tolerance

Tolerance General Tolerance
Dimension
As a general tolerance guideline, polyurethane vacuum casting resins can be expected to shrink 0.3~0.5%, depending on feature geometry.