Shafts and Couplings - Which has a standard dimension ?
Shafts and Couplings - Which has a standard dimension ?
(OP)
I have a broken motor shaft to be replaced with a new one but the motor coupling, which is also damaged, has not been sent to my shop.
Which part has the standard diameter for the interference fit?
1. Shaft dia - 125.00 mm and Coupling dia < 125.00 mm
or
2. Coupling dia = 125.00 mm and Shaft dia > 125.00 mm.
Any links to standards will also be appreciated.
Which part has the standard diameter for the interference fit?
1. Shaft dia - 125.00 mm and Coupling dia < 125.00 mm
or
2. Coupling dia = 125.00 mm and Shaft dia > 125.00 mm.
Any links to standards will also be appreciated.





RE: Shafts and Couplings - Which has a standard dimension ?
Standard NEMA dimensions:
http://
RE: Shafts and Couplings - Which has a standard dimension ?
RE: Shafts and Couplings - Which has a standard dimension ?
Most likely it is to the IEC standard:
http://www.usmotors.com/FL600/IEC-Dimensions.pdf
The SI tolerance will provide the interfernce between the shaft and bore.
RE: Shafts and Couplings - Which has a standard dimension ?
And idea where I can look up those tolerances ?
RE: Shafts and Couplings - Which has a standard dimension ?
You need to now your shaft size and the IEC dimensions will give a tolernce spec, for example "J6"
The shaft and bore tolerances for J6 can be found in Machinery's Handbook
RE: Shafts and Couplings - Which has a standard dimension ?
RE: Shafts and Couplings - Which has a standard dimension ?
Shaft 125.000 h6 = 125.000 +0.000 -0.025
Coupling 125.000 H7 = 125.000 -0.000 +0.040
http://w
Scroll down to the bottom on left side and clk on ISO holes or ISO shafts.
Here is another useful site: htt
Juergen
RE: Shafts and Couplings - Which has a standard dimension ?
- I did some more research . The interference fit for cylindrical shaft ends is found under DIN 42946 as follows:
Shaft 125.000 m6 = +15/+40 (+0.015 to +0.040)
The coupling should be H7 = 125.000 0 to +40 (0.040)