Any one design a cutting tool?

[davidphilips]

Spent hours today cutting out a sized in alloy seat post from a bike with a hacksaw blade, know there are drills etc but wonder why no one has designed a large hacksaw blade holder thats spring loaded at the back of the blade to apply pressure to the cutting edge and small enough to go into a sized post?.

 

[Darius_Jedburgh]

If bikes were maintained properly then the tool wouldn't be needed.

 

[raleighnut]

Wot one of these,

https://www.bing.com/aclk?ld=e8AxAw...Ub29scw&rlid=52c10eda3b4516c8d07251a953e10d4f

 

[screenman]

Spent hours today cutting out a sized in alloy seat post from a bike with a hacksaw blade, know there are drills etc but wonder why no one has designed a large hacksaw blade holder thats spring loaded at the back of the blade to apply pressure to the cutting edge and small enough to go into a sized post?.

I like your idea, but it would not a be a big seller so would make very little money. A tool made for the job is an adjustable king pin broach. broach

 

[davidphilips]

Wot one of these,

https://www.bing.com/aclk?ld=e8AxAw...Ub29scw&rlid=52c10eda3b4516c8d07251a953e10d4f

Yes thinking of some thing like that but with a spring to hold the pressure to the cutting edge with perhaps a semi round guide at the back to try and keep it in place?
As screenman says it would not a be a big seller so would make very little money, know after all the work i done yesterday for a cycling friend i will start and check all my own bikes a bit more often even the bikes that are not used much.

 

[raleighnut]

Yes thinking of some thing like that but with a spring to hold the pressure to the cutting edge with perhaps a semi round guide at the back to try and keep it in place?
As screenman says it would not a be a big seller so would make very little money, know after all the work i done yesterday for a cycling friend i will start and check all my own bikes a bit more often even the bikes that are not used much.

What you do is insert the blade with the teeth facing the handle so it cuts on the pull stroke.

 

[Big John]

Never had to cut one out but did spend days pouring lube on the seat post in the hope that it would seep in between the seat tube and the post. Finally used a pipe wrench and brute force and ignorance to get it out. Whenever I put a seat post in these days I use copper slip - something I picked up off here. I've never got one stuck since. I do find the advice on here seriously useful.

 

[Poacher]

Having had to do it once, I know what a tedious job it can be. Would a reciprocating saw with the appropriate blade work OK?

 

[classic33]

Don't do the cutting on the push stroke. Reverse the blade, cutting on the draw stroke.

Simple enough then to fashion a handle that holds the blade. Or for a one-off job, a cloth to protect your hand.

protey corrected to protect in edit

 

[MichaelW2]

A jig inside the tube would help.
I would use a broom handle sized to fit , cut a slot. To apply pressure on the pull you need a spring loaded thing inside the slot. The kind of rarely used custom tool that workshops make for themselves.

 

[raleighnut]

Never had to cut one out but did spend days pouring lube on the seat post in the hope that it would seep in between the seat tube and the post. Finally used a pipe wrench and brute force and ignorance to get it out. Whenever I put a seat post in these days I use copper slip - something I picked up off here. I've never got one stuck since. I do find the advice on here seriously useful.

Vaseline (Petroleum jelly) works as well and is a lot cleaner. Grease is a non starter in this application as it contains Soap so won't protect against galvanic corrosion