Radial markings on oem gear teeth
Radial markings on oem gear teeth
(OP)
What is the purpose of the radial 'nicks' Im seeing on nearly all automotive helical gear teeth?
The small nicks can lie on centre, to one side, or there can be a few of them - in a radial pattern.
I spent a long time having a quiz with myself as to their function, but Ive just given up.
Random thoughts were to allow trapped oil to escape(somehow)
To break up the loads(doubtful)
Some form of jig marks(odd place to jig)
So, put me out of my misery.
Nicks can be see in image, on the lower gear sets.
Thanks in advance,
Brian,
The small nicks can lie on centre, to one side, or there can be a few of them - in a radial pattern.
I spent a long time having a quiz with myself as to their function, but Ive just given up.
Random thoughts were to allow trapped oil to escape(somehow)
To break up the loads(doubtful)
Some form of jig marks(odd place to jig)
So, put me out of my misery.
Nicks can be see in image, on the lower gear sets.
Thanks in advance,
Brian,
RE: Radial markings on oem gear teeth
If so, I dunno. They look intentional. Maybe they carry information, like a date code or lot code, traceable from blank to finished gearset, or maybe they just identify which of several similar blanks you might be looking at.
Mike Halloran
Pembroke Pines, FL, USA
RE: Radial markings on oem gear teeth
Ill keep thinking...
Brian,
RE: Radial markings on oem gear teeth
Mike Halloran
Pembroke Pines, FL, USA
RE: Radial markings on oem gear teeth
Maybe Ill just stop thinking about them and put it down to witness markings.
The last time this happened was when I wondered why trains did not need differentials. 3 weeks later, and nearly insane I figured it out with 'thought power' alone, I should have called it off way before that, or_asked_someone, but I figured it was too obvious to give into. It turned out to be not that obvious at all.
Thanks Mike,
Brian,
RE: Radial markings on oem gear teeth
A differential in the axle would probably cause truck hunting and greatly increased flange wear.
The tools for rolling splines last a bit longer if the blanks are very roughly turned, so the rack tips don't have to press into the blanks all at once.
<back on, er, track>
Note that whatever cut or rolled the grooves in the gear blanks has a relatively large radius, maybe a mm or four, not strongly likely to start a crack.
Mike Halloran
Pembroke Pines, FL, USA
RE: Radial markings on oem gear teeth
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Radial markings on oem gear teeth
More to the point - What is that transmission from? Is that really a scissor gear on the input shaft 4th speed? That must really wreck the efficiency.
M
--
Dr Michael F Platten
RE: Radial markings on oem gear teeth
looks like a fairly typical reverse gear set-up. If so, the gears shown don't mesh with each other. A sliding idler moves into position for reverse
RE: Radial markings on oem gear teeth
These are usually used to eliminate rattle problems, but the added friction is quite significant as the gear is loaded even when idling. It is a pretty last gasp attempt to solve a rattle problem when all else has failed because of the cost and efficiency. You often see them on engine timing or balancer gears because of the high torque fluctuations these gears see.
M
--
Dr Michael F Platten
RE: Radial markings on oem gear teeth
Odd to see it there, cheaper than a dual mass flywheel perhaps, or an unexpected necessary add on?
Brian,
RE: Radial markings on oem gear teeth
''stock Honda B-series''
http://
odd...chatter at Idle perhaps?
Brian,
RE: Radial markings on oem gear teeth
The ones I've seen are centrifugally disabled as the rotational speed increases.
A series of weights drive the mechanism from within the body of the gear.
Ron Volmershausen
Brunkerville Engineering
Newcastle Australia
http://www.aussieweb.com.au/email.aspx?id=1194181
RE: Radial markings on oem gear teeth
RE: Radial markings on oem gear teeth
Thanks Mike,
Brian,
RE: Radial markings on oem gear teeth
Mike Halloran
Pembroke Pines, FL, USA
RE: Radial markings on oem gear teeth
Brian.