- Joined
- Oct 19, 2005
- Messages
- 18,978
Ms Peel's RGM boxed Al swingarm [comes polished],
needs to serve as 100+ PSI air tank
Holes required internally through the front tube cross brace, blind welded to inner leg surface,
Mocked it up in place for hose and fitting routing access and motion clearance.
Made first committed pilot hole a wk ago - only drifted hand drill in lap in rocking chair
in wee am hrs, ~1/8" off the punched bulls eye.
Requires an extra long drill bit to keep drill beyond the swing arm Al and
reach across swing arm at oblique shallow angle thru the cross piece hole,
and not miss and break through to atmosphere.
Found em cheap at Harbor Fe right, about a yard long 1/8", 1/4" and 3/8" kit $6.
Worked my way to commitment to 1/2" cross piece hole plus some Dremal
relieving hole edge to slip in a bit. The cross piece is 1/4" at least, cool.
Double checked sighting of bit projected contact.
Feed in bit to feel it slide in tube to weld seam then tick up onto leg flat, cool.
Tapped swing arm form scratching and eased spinning bit to its task.
Slowly oh so slowing not to flex bit or slip aim, ground and ground for
little effect, put back in with more patience, began to feel good bite
and tried to back light push before angled hole snagged the bit and not break inside.
First Oh No, was Dremal steel ball abraider fell free into the hole, it shook right out, whew.
Halfway successful, bit jammed and un- candy caned its grooves but extracted with just
a back twist. It cracked through leg wall though, yea!.
So appears may take 3-4 bits to get er done to flow air fully.
Next step was to test for more air volume by puffing into the hole,
brigthened mood to take more than one breath to feel resistance,
then chest fallen on next breath as nil resistance and air leak heard .
UH oh, UH oh UH oh with blank starring in cocking dog head confusion.
Nothing on the out side showed, whew, seems the big axle adjuster
puck sleeves welding at top/bottoms of the narrow box section did not fill the gap.
Well fine then, planned on two condensation bolts tapped in bottom each leg
low point, so will drbble in enough epoxy to get the gaps sealed, I hope,
and not drain past to the bolt threads that pinch adjuster cam pucks locked.
http://s184.photobucket.com/albums/x93/ ... illjpg.jpg
Have I ruined a nice item or advanced it to even better function?
Immediate prior great success step into failure was new crank I'd never handled
but found too bent to use, so replacement ordered - as per Norton tradition..
hobot
needs to serve as 100+ PSI air tank
Holes required internally through the front tube cross brace, blind welded to inner leg surface,
Mocked it up in place for hose and fitting routing access and motion clearance.
Made first committed pilot hole a wk ago - only drifted hand drill in lap in rocking chair
in wee am hrs, ~1/8" off the punched bulls eye.
Requires an extra long drill bit to keep drill beyond the swing arm Al and
reach across swing arm at oblique shallow angle thru the cross piece hole,
and not miss and break through to atmosphere.
Found em cheap at Harbor Fe right, about a yard long 1/8", 1/4" and 3/8" kit $6.
Worked my way to commitment to 1/2" cross piece hole plus some Dremal
relieving hole edge to slip in a bit. The cross piece is 1/4" at least, cool.
Double checked sighting of bit projected contact.
Feed in bit to feel it slide in tube to weld seam then tick up onto leg flat, cool.
Tapped swing arm form scratching and eased spinning bit to its task.
Slowly oh so slowing not to flex bit or slip aim, ground and ground for
little effect, put back in with more patience, began to feel good bite
and tried to back light push before angled hole snagged the bit and not break inside.
First Oh No, was Dremal steel ball abraider fell free into the hole, it shook right out, whew.
Halfway successful, bit jammed and un- candy caned its grooves but extracted with just
a back twist. It cracked through leg wall though, yea!.
So appears may take 3-4 bits to get er done to flow air fully.
Next step was to test for more air volume by puffing into the hole,
brigthened mood to take more than one breath to feel resistance,
then chest fallen on next breath as nil resistance and air leak heard .
UH oh, UH oh UH oh with blank starring in cocking dog head confusion.
Nothing on the out side showed, whew, seems the big axle adjuster
puck sleeves welding at top/bottoms of the narrow box section did not fill the gap.
Well fine then, planned on two condensation bolts tapped in bottom each leg
low point, so will drbble in enough epoxy to get the gaps sealed, I hope,
and not drain past to the bolt threads that pinch adjuster cam pucks locked.
http://s184.photobucket.com/albums/x93/ ... illjpg.jpg
Have I ruined a nice item or advanced it to even better function?
Immediate prior great success step into failure was new crank I'd never handled
but found too bent to use, so replacement ordered - as per Norton tradition..
hobot