Questions on pinion runout
Questions on pinion runout
(OP)
Runout questions on pinion:
1.No matter the perpendicularity or runout callout, the reference datum is B-A on the pinion print (page 1), however the reference datum on the assembly drawing (page 2) is A-B, are there any differences between them (A-B and B-A)?
2.What is the meaning of runout callout on a wire size Ø.0864?
3.The bench center is around $700, it’s very expensive, I am trying to save the money, are there any other open-setup ways to measure the perpendicularity or runout?
Thanks for all your comments
SeasonLee
1.No matter the perpendicularity or runout callout, the reference datum is B-A on the pinion print (page 1), however the reference datum on the assembly drawing (page 2) is A-B, are there any differences between them (A-B and B-A)?
2.What is the meaning of runout callout on a wire size Ø.0864?
3.The bench center is around $700, it’s very expensive, I am trying to save the money, are there any other open-setup ways to measure the perpendicularity or runout?
Thanks for all your comments
SeasonLee





RE: Questions on pinion runout
2) They are trying to verify that the opposed tooth valleys are symmetrical (high school symmetry); i.e. they average out at Datum C.
3) Set the piece up on a lathe / turning centre. You might also be able to find a commercial runout stand that you can just put a pair of conical mandrels in instead of collets.
Btw, you don't actually have a Datum A or a Datum B callout, just two boxes with letters in them. Put the anchor triangle on the angle dimension line.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Questions on pinion runout
RE: Questions on pinion runout
more like trying to verify pitch diameter?
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Questions on pinion runout
Thanks
SeasonLee
RE: Questions on pinion runout
HTH,
Dan
Han primo incensus
RE: Questions on pinion runout
- balls or cylinders of precisely calculated diameter can be used in inspection of gear runout error (thus runout FCF). There is however a mathematic relation between runout and pitch diameter error, so knowing one makes possible to calculate the second;
- the same balls or cylinders can be used in controlling tooth thickness by determining "dimension over balls or cylinders" (thus mt parameter, I believe).
RE: Questions on pinion runout
I am figuring out how to measure the gear runout, pmarc, would you mind tell more details about the mathematic relation between runout and pitch diameter error. Thanks
SeasonLee
RE: Questions on pinion runout
Not sure whether this isn't against the rules of the forum, but here is a document you may be interested in.
http://www.docin.com/p-299801160.html
The relation is pictured in Figure 11 of the doc.
RE: Questions on pinion runout
SeasonLee