ACME Thread (ACME)
ACME Thread Profile
- Thread form angle : 29°
- P : Pitch
- n: TPI
- H : Height of fundamental triangle
- H0 : Height of thread on basic profile
- h3 : Height of external thread on design profile
- H4 : Height of internal thread on design profile
- ac : Clearance on the crest
- D : Major diameter of internal thread
- D1 : Minor diameter of internal thread
- D2 : Pitch diameter of internal thread
- D4 : Minor diameter of internal thread on design profile
- d : Major diameter of external thread
- d1 : Minor diameter of external thread
- d2 : Pitch diameter of external thread
- d3 : Minor diameter of external thread on design profile
- R1, R2 : Radius at the bottom of thread
- C : Chamfer at the top of thread
ACME Thread Tolerance
- T : Tolerance
- TD1, TD2 : Tolerance for D1, D2
- Td1, Td2 : Tolerance for d1, d2
- ES : Upper deviation of internal thread
- es : Upper deviation of external thread
- EI : Lower deviation of internal thread
- ei : Lower deviation of external thread
- G : general purpose ACME thread tolerance
Example of ACME thread : 1.750-4-ACME-2G
- ACME : ACME thread symbol
- 1.750 : Size
- 4 : TPI
- 2 : tolerance class
- G : general purpose ACME thread tolerance
ACME Thread Dimension
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Pitch :
P =
0.000
mm
Height of fundamental triangle :
H =
0.000
mm
Height of thread on basic profile :
H0 =
0.000
mm
Height of external thread on design profile :
h3 = H4 =
0.000
mm
Clearance between minor diameters on design profile :
ac =
0.000
mm
Radius at the bottom of internal thread :
R1 max =
0.000
mm
Radius at the bottom of external thread :
R2 max =
0.000
mm
Chamfer at the top of external thread :
C max =
0.000
mm
C min =
0.000
mm
Major diameter (mm)
0.000
0.000
0.000
=
Minor diameter (mm)
0.000
0.000
0.000
=
Pitch diameter (mm)
0.000
0.000
0.000
=
For not specified tolerance, we use the pitch tolerance to calculate the average value.
ACME Thread Standard Series
| Size | TPI | Tolerance class |
|---|---|---|
| 0.2500 | 16 | 2G 3G 4G |
| 0.3125 | 14 | 2G 3G 4G |
| 0.3750 | 12 | 2G 3G 4G |
| 0.4375 | 12 | 2G 3G 4G |
| 0.5000 | 10 | 2G 3G 4G |
| 0.6250 | 8 | 2G 3G 4G |
| 0.7500 | 6 | 2G 3G 4G |
| 0.8750 | 6 | 2G 3G 4G |
| 1.0000 | 5 | 2G 3G 4G |
| 1.1250 | 5 | 2G 3G 4G |
| 1.2500 | 5 | 2G 3G 4G |
| 1.3750 | 4 | 2G 3G 4G |
| 1.5000 | 4 | 2G 3G 4G |
| 1.7500 | 4 | 2G 3G 4G |
| 2.0000 | 4 | 2G 3G 4G |
| 2.2500 | 3 | 2G 3G 4G |
| 2.5000 | 3 | 2G 3G 4G |
| 2.7500 | 3 | 2G 3G 4G |
| 3.0000 | 2 | 2G 3G 4G |
| 3.5000 | 2 | 2G 3G 4G |
| 4.0000 | 2 | 2G 3G 4G |
| 4.5000 | 2 | 2G 3G 4G |
| 5.0000 | 2 | 2G 3G 4G |
Related topic
How to create a parallel thread profile with CAD software
How to create a 3D model of parallel thread in 3D CAD software