Thread data sheet

Basic Thread Dimensions

Property mm Inch
Nominal Diameter 45 1.7717
Pitch (Distance) 4.5 0.1772
Pitch Diameter 42.077 1.6566
Minor Diameter 40.129 1.5799
Thread Height 2.436 0.0959
Addendum 1.461 0.0575
Crest (External)
Root (Internal)		 0.563 0.0222
Tap Drill Size
(75% depth)		 40.61 1.599
Lead Angle
(Single Start)		 1.95°
Thread Family Metric Coarse Pitch (MC)
Relevant Standards ISO 68-1, ISO 9651-1, ISO 965-2, ISO 261,DIN 13
Equivalent InchThread1 3/4 - 6 6-UN

For more threading data scroll down, or use the Thread Calculator

Choose the Threading Data you want to explore

Unified Inch Thread Classes

Tolerance Classes

Thread Milling CNC program

Thread Milling Gcode

Turning Gcode

Over Wire

Unified Inch Thread Classes

Tolerance Classes

Thread Milling Gcode

Turning Gcode

Over Wire

M45Possible Thread Classes

External Threads

4g, 4h, 6e, 6g, 6h, 8e, 8g, 5g4g, 5h4h, 5g6g, 7g6g, 7h6h, 7e6e, 9e8e, 9g8g

Metric ISO External Thread - Tolerance sketch

Internal Threads

4H, 5H, 5G, 6H, 6G, 7H, 7G, 8G

Metric ISO Internal Thread - Tolerance sketch

M45 4g (External)

* Permisable values for thread Class 4g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.622 - 44.937 1.7568 - 1.7692
d2 Pitch Diameter 41.864 - 42.014 1.6482 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.924 0.0222 - 0.0364
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 4h (External)

* Permisable values for thread Class 4h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 44.685 - 45 1.7593 - 1.7717
d2 Pitch Diameter 41.927 - 42.077 1.6507 - 1.6566
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.924 0.0222 - 0.0364
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 6e (External)

* Permisable values for thread Class 6e

# Description Value (mm) Value (Inch)
es Allowance 0.1 (Ref) 0.0039 (Ref)
d Major Diameter 44.4 - 44.9 1.748 - 1.7677
d2 Pitch Diameter 41.741 - 41.977 1.6433 - 1.6526
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.999 0.0222 - 0.0393
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 6g (External)

* Permisable values for thread Class 6g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.437 - 44.937 1.7495 - 1.7692
d2 Pitch Diameter 41.778 - 42.014 1.6448 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.999 0.0222 - 0.0393
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 6h (External)

* Permisable values for thread Class 6h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 44.5 - 45 1.752 - 1.7717
d2 Pitch Diameter 41.841 - 42.077 1.6473 - 1.6566
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.999 0.0222 - 0.0393
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 8e (External)

* Permisable values for thread Class 8e

# Description Value (mm) Value (Inch)
es Allowance 0.1 (Ref) 0.0039 (Ref)
d Major Diameter 44.1 - 44.9 1.7362 - 1.7677
d2 Pitch Diameter 41.602 - 41.977 1.6379 - 1.6526
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.103 0.0222 - 0.0434
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 8g (External)

* Permisable values for thread Class 8g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.137 - 44.937 1.7377 - 1.7692
d2 Pitch Diameter 41.639 - 42.014 1.6393 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.103 0.0222 - 0.0434
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 5g4g (External)

* Permisable values for thread Class 5g4g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.622 - 44.937 1.7568 - 1.7692
d2 Pitch Diameter 41.824 - 42.014 1.6466 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.96 0.0222 - 0.0378
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 5h4h (External)

* Permisable values for thread Class 5h4h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 44.685 - 45 1.7593 - 1.7717
d2 Pitch Diameter 41.887 - 42.077 1.6491 - 1.6566
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.96 0.0222 - 0.0378
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 5g6g (External)

* Permisable values for thread Class 5g6g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.437 - 44.937 1.7495 - 1.7692
d2 Pitch Diameter 41.824 - 42.014 1.6466 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 0.96 0.0222 - 0.0378
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 7g6g (External)

* Permisable values for thread Class 7g6g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.437 - 44.937 1.7495 - 1.7692
d2 Pitch Diameter 41.714 - 42.014 1.6423 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.049 0.0222 - 0.0413
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 7h6h (External)

* Permisable values for thread Class 7h6h

# Description Value (mm) Value (Inch)
es Allowance 0 (Ref) 0 (Ref)
d Major Diameter 44.5 - 45 1.752 - 1.7717
d2 Pitch Diameter 41.777 - 42.077 1.6448 - 1.6566
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.049 0.0222 - 0.0413
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 7e6e (External)

* Permisable values for thread Class 7e6e

# Description Value (mm) Value (Inch)
es Allowance 0.1 (Ref) 0.0039 (Ref)
d Major Diameter 44.4 - 44.9 1.748 - 1.7677
d2 Pitch Diameter 41.677 - 41.977 1.6408 - 1.6526
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.049 0.0222 - 0.0413
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 9e8e (External)

* Permisable values for thread Class 9e8e

# Description Value (mm) Value (Inch)
es Allowance 0.1 (Ref) 0.0039 (Ref)
d Major Diameter 44.1 - 44.9 1.7362 - 1.7677
d2 Pitch Diameter 41.502 - 41.977 1.6339 - 1.6526
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.171 0.0222 - 0.0461
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 9g8g (External)

* Permisable values for thread Class 9g8g

# Description Value (mm) Value (Inch)
es Allowance 0.063 (Ref) 0.0025 (Ref)
d Major Diameter 44.137 - 44.937 1.7377 - 1.7692
d2 Pitch Diameter 41.539 - 42.014 1.6354 - 1.6541
R Root Radius 0.563 (Min) 0.0222 (Min)
C Root Truncation 0.563 - 1.171 0.0222 - 0.0461
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 4H (Internal)

* Permisable values for thread Class 4H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 40.129 - 40.554 1.5799 - 1.5966
D2 Pitch Diameter 42.077 - 42.277 1.6566 - 1.6644
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 5H (Internal)

* Permisable values for thread Class 5H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 40.129 - 40.659 1.5799 - 1.6007
D2 Pitch Diameter 42.077 - 42.327 1.6566 - 1.6664
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 5G (Internal)

* Permisable values for thread Class 5G

# Description Value (mm) VValue (Inch)
EL Allowance 0.063 (Ref) 0.0025 (Ref)
D1 Minor Diameter 40.192 - 40.722 1.5824 - 1.6032
D2 Pitch Diameter 42.14 - 42.39 1.6591 - 1.6689
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 6H (Internal)

* Permisable values for thread Class 6H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 40.129 - 40.799 1.5799 - 1.6063
D2 Pitch Diameter 42.077 - 42.392 1.6566 - 1.669
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 6G (Internal)

* Permisable values for thread Class 6G

# Description Value (mm) VValue (Inch)
EL Allowance 0.063 (Ref) 0.0025 (Ref)
D1 Minor Diameter 40.192 - 40.862 1.5824 - 1.6087
D2 Pitch Diameter 42.14 - 42.455 1.6591 - 1.6715
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 7H (Internal)

* Permisable values for thread Class 7H

# Description Value (mm) VValue (Inch)
EL Allowance 0 (Ref) 0 (Ref)
D1 Minor Diameter 40.129 - 40.979 1.5799 - 1.6133
D2 Pitch Diameter 42.077 - 42.477 1.6566 - 1.6723
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 7G (Internal)

* Permisable values for thread Class 7G

# Description Value (mm) VValue (Inch)
EL Allowance 0.063 (Ref) 0.0025 (Ref)
D1 Minor Diameter 40.192 - 41.042 1.5824 - 1.6158
D2 Pitch Diameter 42.14 - 42.54 1.6591 - 1.6748
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

M45 8G (Internal)

* Permisable values for thread Class 8G

# Description Value (mm) VValue (Inch)
EL Allowance 0.063 (Ref) 0.0025 (Ref)
D1 Minor Diameter 40.192 - 41.252 1.5824 - 1.6241
D2 Pitch Diameter 42.14 - 42.64 1.6591 - 1.6787
D Major Diameter 45 (Min) 1.7717 (Min)
LE Normal Length of Engagement 21 - 63 0.8268 - 2.4803

* Back to Thread Class Selection

Over Wire Measurements for M45


* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it here

mm Inch
Permissible Wire Diameter Range 2.273 - 4.547 0.0895 - 0.179
Ideal Wire Diameter 2.598 0.1023
Possible Wires
From Standard Sets		 * 2.309
* 2.598
* 2.887
* 3.175
* 3.464
* 4.042
 * 0.0962
* 0.105
* 0.1155
* 0.1283
* 0.1443
* 0.165
* 0.1777

Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!

CNC Gcode Program for Turning of M45

The below sample Gcode is configured for:

  • Fanuc Controller
  • External RH Thread
  • Right hand tool, machining towards the chuck
  • Flank Infeed method with contant volume
  • Flank Infeed method with contant volume
  • Cutting conditions for steel
  • Default number of passes

You can configure all the above parameters and much more in our Thread Turning Gcode Generator 


%
O0100
(MACHINING DOCTOR - THREADING CNC PROGRAM)
(CONTROLER - FANUC A)
(THREAD - D=45 MM, P=4.5 MM, L=45 MM)
(APPLICATION - EXTERNAL TURNING, TOWARDS CHUCK, RH TOOL, RH THREAD)
(FEED - 15 PASSES, FLANK, CONSTANT VOLUME)
(FINISH PASS - 0.046 MM)
(WITH CHAMFER -  NO)
G28 U0 W0
T0101 G99 G97 S707 M03
G00 Z10.0
X 54.8 M08
G76 P010060 Q46 R0.046
G76 X39.479 Z-45.0 P2760 Q701 F4.5 R0.00 
G28 U0 W0
M09
M30
%

CNC Gcode Program for Thread Milling of M45

The below sample Gcode is configured for:

  • Fanuc Controller
  • Internal RH Thread
  • Climb Milling
  • Cutter diameter: 70% of the thread diameter
  • Single tooth Thread Mill cutter
  • Cutting conditions for steel
  • One radial pass

You can configure all the above parameters and much more in our Thread Milling Gcode Generator 


%
O101
(WWW.MACHININGDOCTOR.COM - THREADMILLING PROGRAM)
(CONTROLER - FANUC)
(THREAD - D=45 MM, P=4.5 MM, L=45 MM)
(APPLICATION - INTERNAL, RH THREAD, CLIMB MILLING)
(CUTTER - D=22.5 [SINGLE TOOTH])
N1 M06 T1
G54
G90 G40 G17 G94 G21
G00 X0 Y0 S1415 M03
G43 H1 Z20.0 M08
(M-CODE "THROUGH COOLANT ON")
(PASS 1 / 1)
G90 G01 Z-45.563 F2000
G91 G01 G41 D1 X5.625 Y-5.625 F212
G03 X5.625 Y5.625 Z0.563 I0 J5.625 F53
G03 Z4.5 I-11.25 J0 F106
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 Z4.5 I-11.25 J0
G03 X-5.625 Y5.625 Z0.563 I-5.625 J0
G01 G40 X-5.625 Y-5.625 F2000
G90 G00 Z20.0
M30
(PLEASE NOTE THIS GCODE HAS NOT BEEN TESTED ON YOUR MACHINE AND SETUP. WE CANNOT GUARANTEE ITS ACCURACY OR COMPATIBILITY. NOTE THAT YOU ARE USING IT AT YOUR OWN RISK, AND WE SHALL NOT BE HELD LIABLE FOR ANY DAMAGES OR LOSSES ARISING FROM THE USE OF THIS PROGRAM.)
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