rmcphearson
Hot Rolled
- Joined
- Jan 12, 2008
- Location
- Rochester, NY
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Spindle shaft w/ spiral grooves
- Thread starter rmcphearson
- Start date
- Replies 17
- Views 6,117
magneticanomaly
Titanium
- Joined
- Mar 22, 2007
- Location
- On Elk Mountain, West Virginia, USA
If a automotive wheel spindle on which bearings fit, perhaps a non-functional tool-withdrawal mark, conceivably an effort to pump grease back out to the outboard bearing...Is the hand different on left and right spindles?
Looks like and old trailer electric brake set-up.
As mentioned above, tool retract.
My W&S automatic can leave those, but the
size of them indicates the tool was getting dull, and tool pressure was high.
I can eliminate most all of it by adding a second (finishing) tool, with a
small lead angle to keep deflection under cut down, retracting
doesn't have much to cut.
EDIT: Upon a second look, that turned diameter is not one of the (2) critical
sizes for the bearings, so it gets simply roughed, hence the rough finish,
and heavy tool pressure from running high feed with a large nose radius.
As mentioned above, tool retract.
My W&S automatic can leave those, but the
size of them indicates the tool was getting dull, and tool pressure was high.
I can eliminate most all of it by adding a second (finishing) tool, with a
small lead angle to keep deflection under cut down, retracting
doesn't have much to cut.
EDIT: Upon a second look, that turned diameter is not one of the (2) critical
sizes for the bearings, so it gets simply roughed, hence the rough finish,
and heavy tool pressure from running high feed with a large nose radius.
juergenwt
Stainless
- Joined
- Feb 2, 2008
- Location
- Wheaton, IL.
Oil grooves. Also oil pump.
Illinoyance
Stainless
- Joined
- Aug 24, 2015
What he said.
rmcphearson
Hot Rolled
- Joined
- Jan 12, 2008
- Location
- Rochester, NY
I don't know. I friend sent me this photo. He says all four look like this. I'm satisfied now it's a tool-withdrawal mark. I'm familiar with them on rough cuts but I never left one on a finished product. That's what threw me.
Thanks gents!
Limy Sami
Diamond
- Joined
- Jan 7, 2007
- Location
- Norfolk, UK
What he said X 2 ...............oh for the days when things like that didn't matter
....like stub axles on cars, the two different dia bearing seats, seal track and thread - all perfect, .............the taper in between - as rough as guts, as long as it cleared the hub - job done.What he said X 2 ...............oh for the days when things like that didn't matter
That's the part we "Chew off".....
Krutch
Stainless
- Joined
- Feb 11, 2010
- Location
- somewhere in Illinois
I don't really know, but such a groove is used on pre-`55 Harley sprocket shaft "seal" to cause oil to return to the inside of the engine during operation. When I wrote seal, what it is is a metal insert which is supposed to be a close fit on the shaft and the internal groove is such that while running any oil will be coaxed back towards the inside.
The photo in your post looks somewhat like that HD seal groove but seems to coax oil towards the bottom. Perhaps if it is what I described, could be to keep oil from the brake shoes above.
Good story about an Archimedes screw on the Harley shaft, but for a trailer the spindle is stationary. The centrifugal force in the hub moves the grease to the outside of the hub, away from contact with the spiral groove on the clearance diameter.
Also note that the Harley bearing was oil lubricated, not grease.
split tenth
Hot Rolled
- Joined
- Sep 19, 2007
- Location
- mesa arizona
Possibly used in a dirty environment to constantly expel foreign matter from a bearing housing. Example,bottom bracket axle on fine racing bicycles.
Tool Grooves as stated earlier. There are spiral oil return grooves on some shafts however if the inner wheel bearing is spinning (which would be required for oil/grease retention) the spindle wont last long.
GM cut spiral grooves on distributor shafts back in the late 80's to prevent oil from wicking into the pick-up coil. problem was they would then wear out the shaft and bushings...
GM cut spiral grooves on distributor shafts back in the late 80's to prevent oil from wicking into the pick-up coil. problem was they would then wear out the shaft and bushings...
I thought it looked familiar....
It's not a machine tool spindle, not a motorcycle engine
crank, not anything but a simple obsolete trailer spindle.
What Do Old Warner Trailer Brake Assemblies Look Like | etrailer.com
It's not a machine tool spindle, not a motorcycle engine
crank, not anything but a simple obsolete trailer spindle.
What Do Old Warner Trailer Brake Assemblies Look Like | etrailer.com
Limy Sami
Diamond
- Joined
- Jan 7, 2007
- Location
- Norfolk, UK
Nice one Doug, ........but they're still just tool retraction grooves
Yup, I re-habbed an older trailer last year, fitting all new
electric brakes, the axles (6200 lb units) obsolete but still usable.
Anyhow, they were the drop design, and completely forged from
1 large piece of barstock, the spindle, the brake back flange,
the dropped portion, all the way down to near the center of the
trailer.
The center portion between the bearings looked hand forged at best, nary a cutting tool touched it.
It probably made the accountants proud.....
