I wonder if anyone can advise how difficult it is to replace the location
pin or key as found in a Bridgeport R8 vertical spindle. I have noticed one
of my Briddgie's has no location when inserting a Clarkson chuck, I don't
want it to start spinning and then ruin the spindle. It's obvious to me the
spindle needs to be removed, but how much junk has also to be removed to get
Hello to change the key its dead easy lower the quill about 2" look at the
back of the quill there is a 1/4" U N F grub screw take that out this
should now let you undo the locking ring on the quill remove locking ring to
reveal the screw in the quill you will find that it sits above the bottom of
the quill to gain better access using your mallet tap the collet drawbar
down gently this will push the spindle with the bearings out of the quill
you only need about a 1/4" to get the allen key into the screw if you knock
the quill out any further the whole spindle will drop now the first one of
the grub screws is only about 1/8" thick and is open ended this is just the
lock screw then remove the second 1/4" U N F grub screw check the length as
this is important it needs the key tip adding onto the length of it but no
longer the tip needs to be about .145" dia and about .100" in length check
the diameter with your collets groove screw a new grubscrew back in again
checking with your collets that you can slide them in and out easy lock it
into position with the half grub screw pull the quill down onto the bed to
push the spindle back in place and replace the bearing locking ring making
sure you have a few thou gap between the locking and the end of the quill
tube this makes sure the spindle and bearings are pressed right in to the
quill then replace the 1/4" U N F grub screw into the quill tube but make
sure you only nip this one lightly otherwise you will find it distorts the
quill and makes it tight at the top of the travel it's dead simple really
with care and patience and it is better with it in as it makes it easier
when tightening the collet up cheers Colin
Here's a translation for the cousins:-
Howdy t'change th' key its daid easy lower th' quill about 2" look at th' back
quill thar is a 1/4" U N F grub screw take thet out this hyar sh'd now let yo'
lockin' rin' on th' quill remove lockin' rin' t' reveal th' screw in th' quill
find thet it sits above th' bottom of th' quill t'gain better access usin' yer
th' collet drawbar down juntly this hyar will push th' spindle wif th' barin's
quill, ah reckon. Yo' only need about a 1/4" t'git th' allen key into th' screw
knock th' quill out enny further th' whole spindle will drop now th' fust one of
screws is only about 1/8" thick an' is open inded this hyar is jest th' lock
remove th' second 1/4" U N F grub screw check th' len'th as this is impo'tant it
key tip addin' onto th' len'th of it but no longer th' tip needs t'be about
.145" dia an'
about .100" in len'th check th' diameter witcher collets groove screw a noo
in agin checkin' witcher collets thet yo' kin slide them in an' out easy lock it
posishun wif th' ha'f grub screw pull th' quill down onto th' bed t' push th'
in place an' replace th' barin' lockin' rin' makin' sure yo' haf a few thou gap
th' lockin' an' th' end of th' quill tube this hyar makes sho'nuff th' spindle
is pressed right in t'th' quill then replace th' 1/4" U N F grub screw into th'
but make sure yo' only nip this hyar one lightly otherwise yo' will find it
quill an' makes it tight at th' top of th' travel, ah reckon. Tt's daid simple
care an' patience an' it is better wif it in as it makes it easier when
collet up cheers Colin
Visit the new Model Engineering adverts page at:-
Or for those living south of watford....
Wotcher ter change the bloomin' key its dead easy lower the quill
about 2" 'ave a look at the back of the quill there is a 1/4" U N F
grub screw take that out this should now let yer undo the lockin'
ringg on the quill remove lockin' ringg ter reveal the screw in the
quill yer will find that it sits above the bottom of the bleedin'
quill ter gain better access usin' yor mallet tap the collet drorbar
dahn gently this will push the spindle wiv the bloody bearings out of
the bloody quill yer only need about a 1/4" ter get the allen key into
the bloody screw if yer knock the quill out any furffer the bleedin'
'oole spindle will drop now the chuffin' first one of the grub screws
is only about 1/8" fick and is open ended this is just the bleedin'
lock screw then remove the second 1/4" U N F grub screw check the
lengff as this is important it needs the key tip addin' onto the
bloomin' lengff of it but no longer the tip needs ter be about .145"
dia and about .100" in lengff check the diameter wiv yor collets
groove screw a new grubscrew hammer and tack in again checkin' wiv yor
collets that yer can slide them in and out easy lock it into position
wiv the bloody half grub screw pull the bleedin' quill dahn onto the
bloody bed ter push the spindle hammer and tack in place and replace
the bloomin' bearin' lockin' ringg makin' sure yer 'ave a few fou gap
between the lockin' and the end of the quill tube this makes sure the
chuffin' spindle and bearings are pressed right in ter the quill then
replace the 1/4" U N F grub screw into the bloody quill tube but make
sure yer only nip this one lightly uvverwise yer will find it distorts
the bloomin' quill and makes it tight at the top of the travel it's
dead simple right wiv care and patience and it is better wiv it in as
it makes it easier wen tightenin' the bloody collet up cheers Colin
Nope, still makes no never mind down yer boyo, this ouse needs an
overman to sort you lot oot. Jones the engineman will know what yer
bleeting bout, mightbe Jones the hammerman would be ontuit. Now wer
did that shipp wanter to?
Keith (an Englishman abroad)
quoted text -
It might have done, it's so difficult to understand their accent when
they're excited. My good lady uttered the first tongue lashing this
morning as she felt I needed some motivational help to ensure I bought
some more copper pipe to finish the plumbing I'm supposed to be doing
right NOW. Anyone know any good excuses?
Ahh Dave, I WISH.
I know nostalgia isn't what it used to be but those were the days
weren't they? Those halcyon P-M (Pre-marriage) days when anything
seemed possible and usually was :)) Now in the other PM days (post
marriage) aches and pains get in the way of everything, I have to
agree with the wife when she says she took on a real "headache" when
she married me, the blasted thing has lasted 35 years and still no
sign of going away, Oh well dreaming over, back to the workshop, oh
how the mighty have fallen