Author Topic: An old foe slain forever removing a stuck steel seatpost (Read 9250 times)

oldschoolace · « **on:** January 18, 2015, 05:19 PM »

The excitement of finding my vitus soon turned into despair when it became apparent the GT seatpost in it was well and truly stuck

After going through the usual gambit of oil soaking, twisting with an old stem etc i put it aside resign to the fact that one day i was going to have to take more drastic measures which would probably ruin the original chrome and possibly the whole frame as it is very light and probably not that resilient to being knocked about.
I could see the whole frame wanting to twist when i had the seatpost in a vice

Over christmas i had time to thing about it a bit more and made plans for a bit of home brew engineeering

The first and most important bit was to carefully drill a neat hole in a block of aluminium with a 1 inch diameter on one side and a 7/8th diameter on the other with a defined step where the two met.

The other side was drilled to house 4 threaded rods

Next i drilled another block right through with a 7/8th bit and drilled and threaded 4 holes for the threaded rod

This was then drilled thought the side to accept a 6mm steel rod and mounted over the very top of the stuck post. The side holes were used as guides to drill through the post.

When assembled the whole set looked like this

Turning the nuts half a turn at a time and working my way round the jig took up the slack and with a few alarmingly loud cracks and pings the masking tape told me the good news and the post had started to move. Ten minutes later the post was out

The block were cut as thick as they were for strength and to support the very top of the seat tube which is obviously weaker with the keyhole slot. The top of the seat tube was left unmarked (appart from the previous owners attempts to remove the tube)

A close up of the bottom block seated on the seat tube.

The hole through the seat tube hardly deformed under the pressure

Well happy

Could possibly post this on if anyone wants a try a bit like the rim jig, would have to come up with some more detailed instructions first though

pickle · « **Reply #1 on:** January 18, 2015, 05:22 PM »

superb work there! That's amazing mate

snoopy72 · « **Reply #2 on:** January 18, 2015, 05:24 PM »

I like that

saved blisters from the old hacksaw blade trick and the risk of cutting into the frame.

wildon · « **Reply #3 on:** January 18, 2015, 05:25 PM »

Brilliant

rodriguez · « **Reply #4 on:** January 18, 2015, 05:34 PM »

Brilliant

Munnyella · « **Reply #5 on:** January 18, 2015, 05:37 PM »

top bodgin!! simple and effective. well done!

MM

Dannywhac · « **Reply #6 on:** January 18, 2015, 05:42 PM »

That is fookin ace Clint

chubby · « **Reply #7 on:** January 18, 2015, 05:59 PM »

Not a cannon then $:-\$

Marvellous bit of bodgery Clint, fookin amazes me where all these ideas come from.........

Perhaps I should stop killing my brain cells with cider n fags

snoopy72 · « **Reply #8 on:** January 18, 2015, 06:02 PM »

Quote from: chubby on January 18, 2015, 05:59 PM

Not a cannon then $:-\$

Marvellous bit of bodgery Clint, fookin amazes me where all these ideas come from.........

Perhaps I should stop killing my brain cells with cider n fags

Swap them for Tuna and maxi muscle before it's too late

Bfellows · « **Reply #9 on:** January 18, 2015, 06:03 PM »

Lovely bit of tinkering

i find that anything seized often responds to being "shocked" out so to speak, rather than building up a steady pressure. Take up the slack, put it under tension, warm the frame post with a heat gun, then give it a belt.......

chubby · « **Reply #10 on:** January 18, 2015, 06:04 PM »

Quote from: snoopy72 on January 18, 2015, 06:02 PM

Quote from: chubby on January 18, 2015, 05:59 PM
Not a cannon then $:-\$

Marvellous bit of bodgery Clint, fookin amazes me where all these ideas come from.........

Perhaps I should stop killing my brain cells with cider n fags
Swap it for Tuna and maxi muscle

Think I'd rather carry on killing em snoop

snoopy72 · « **Reply #11 on:** January 18, 2015, 06:06 PM »

Quote from: Bfellows on January 18, 2015, 06:03 PM

Lovely bit of tinkering i find that anything seized often responds to being "shocked" out so to speak, rather than building up a steady pressure. Take up the slack, put it under tension, warm the frame post with a heat gun, then give it a belt.......

I tend to buy a frame without the seat post still in it

Makes me want to buy one with a stuck seat post now.

insectbones · « **Reply #12 on:** January 18, 2015, 06:30 PM »

Brilliant idea

BMX1973 · « **Reply #13 on:** January 18, 2015, 07:15 PM »

Great bit of engineering.

I bet you get a few radsters wanting to borrow that.

bmxband1t77 · « **Reply #14 on:** January 18, 2015, 11:31 PM »

TOP JOB LAD!

Sent from my iPhone using Tapatalk

griff · « **Reply #15 on:** January 19, 2015, 01:27 AM »

Top bodging Clinton

I bet it couldn't shift 'Excalibur' from my silverfox though

Taipan · « **Reply #16 on:** January 19, 2015, 09:25 AM »

oldschoolace · « **Reply #17 on:** January 19, 2015, 10:11 AM »

Quote from: griff on January 19, 2015, 01:27 AM

Top bodging Clinton
I bet it couldn't shift 'Excalibur' from my silverfox though

stick a pic up Griff, let's have a look

dancetothedrummersbeat · « **Reply #18 on:** January 19, 2015, 02:00 PM »

That's excellent Clint. Well done

In2bmx · « **Reply #19 on:** January 19, 2015, 02:29 PM »

Awesome

Jaymz · « **Reply #20 on:** January 19, 2015, 06:37 PM »

Awesome as always

Sid1972 · « **Reply #21 on:** January 19, 2015, 06:43 PM »

Awesome!! Could double a penis enlarger also. $:-\$

Discostu · « **Reply #22 on:** January 19, 2015, 07:46 PM »

Awesome work yet again.

nosepickben · « **Reply #23 on:** January 19, 2015, 08:24 PM »

Very good work!! I like.

kalex · « **Reply #24 on:** January 21, 2015, 07:09 PM »

excellent job

Author Topic: An old foe slain forever ***removing a stuck steel seatpost*** (Read 9250 times)

rodriguez

griff

In2bmx

Author Topic: An old foe slain forever removing a stuck steel seatpost (Read 9250 times)