Ansi 92.1 Spline, tolerances definition
Ansi 92.1 Spline, tolerances definition
(OP)
Hello everybody
I need to specify an internal spline correctly
I am using ansi B92.1 (from machinery's handbook, 28 ed)
the specification is:
FLAT ROOT SIDE FIT
CLASS 5
PITCH 32/64
PRESSURE ANGLE 30 DEG
BASE DIAMETER 0.8931 REF
PITCH DIAMETER 1.0313 REF
MAJOR DIAMETER 1.0734
FORM DIAMETER 1.0665
MINOR DIAMETER 1.000
CIRCULAR TOOTH THICKNESS
MAX ACTUAL 0.0519
MIN EFFECTIVE 0.0491
But a do not know what to use for the tolerances of the major, minor and form diameter.
Machinery's handbook mentions:
Major diameter x.xxx MAX
form diameter x.xxx
Minor diameter x.xxx/x.xxx
how do I get these values ?? ,
1) What is the maximum value for major diameter ??
2) Form diameter, is this value the nominal that I obtained ??
3) how I get the min/max value for minor diameter? I just have the nominal value.
Also, I am defining the male spline for this, so I need the considerations for male spline tolerances,
I really appreciate your help, i have not found information about it.
thanks
Javier
I need to specify an internal spline correctly
I am using ansi B92.1 (from machinery's handbook, 28 ed)
the specification is:
FLAT ROOT SIDE FIT
CLASS 5
PITCH 32/64
PRESSURE ANGLE 30 DEG
BASE DIAMETER 0.8931 REF
PITCH DIAMETER 1.0313 REF
MAJOR DIAMETER 1.0734
FORM DIAMETER 1.0665
MINOR DIAMETER 1.000
CIRCULAR TOOTH THICKNESS
MAX ACTUAL 0.0519
MIN EFFECTIVE 0.0491
But a do not know what to use for the tolerances of the major, minor and form diameter.
Machinery's handbook mentions:
Major diameter x.xxx MAX
form diameter x.xxx
Minor diameter x.xxx/x.xxx
how do I get these values ?? ,
1) What is the maximum value for major diameter ??
2) Form diameter, is this value the nominal that I obtained ??
3) how I get the min/max value for minor diameter? I just have the nominal value.
Also, I am defining the male spline for this, so I need the considerations for male spline tolerances,
I really appreciate your help, i have not found information about it.
thanks
Javier
RE: Ansi 92.1 Spline, tolerances definition
RE: Ansi 92.1 Spline, tolerances definition
RE: Ansi 92.1 Spline, tolerances definition
ANSI B92.1-1996 table 16 lists:
major dia ext tol = +.000/-.014"
major dia int = 1.077" max
minor dia ext= 0.975" min
minor dia int tol= +.005/-.000"
form dia = basic dim
Splines designed to earlier revisions of ANSI B92.1 may not fit with those made to the 1996 revision.
I would recommend that you take batter1979's advice and buy the spec., so that you can verify my numbers.
Good luck.
Terry
RE: Ansi 92.1 Spline, tolerances definition
I kind of wonder why you chose the pin sizes in your program.
I think it would be difficult to use those inch size multipliers
in the metric system. It would seem to me that you would want to use 1.75 and 2.00 instead of 1.728 and 1.92 as multipliers in the metric system or maybe round up to the nearest quarter or half of a millimeter for the pin sizes.
RE: Ansi 92.1 Spline, tolerances definition