Thread: Cutting Bowling ball on Bandsaw

some big band saws here

http://www.youtube.com/watch?v=6vZ7D...XjL1VlQTC1Sr4Q

Well that's handy then! I'll have to remember that for the very next time I have to saw up a bowling ball. The work holding is a bit suss though!
Methinks that the nice lady in the vid needs to vastly improve her knowledge of band saw operations as an exec in a company that flogs bandsaw blades..

Specifically what i am referring to are the points of contact where the ball is gripped in the vice. That mounting method can slip very easily. When those large blades come off of their own its not fun getting them out of the machine and avoiding a twist in the blade.


I had a 32mm wide blade to remove from a large pipe diameter and a horizontal arm machine after the blade dismounted off the band wheels due to some one else's poor set up.The blade was a throwaway.

A good application for a sawn ball would be as a mount for an engravers vice allowing ease of position change for the vice. Sit the ball in a say,a wheel barrow tire and it could,nt move about.Though, I just would take just enough to mount the vice off the top of the ball.

I think I would be attaching a length of angle to it to give better engagement with the vice jaws. Strangely enough,I do have an old bowling bowl and a bandsaw.HMMMM!

Grahame

My first thought was for the import of illegal substances.

Dean

Originally Posted by eskimo

some big band saws here

http://www.youtube.com/watch?v=6vZ7D...XjL1VlQTC1Sr4Q

Like the colour of their coolant you won't have to dump it if you get some blood in it.
Regards

Originally Posted by Grahame Collins

A good application for a sawn ball would be as a mount for an engravers vice allowing ease of position change for the vice. Sit the ball in a say,a wheel barrow tire and it could,nt move about.Though, I just would take just enough to mount the vice off the top of the ball.

Along a similar vein (actually this is a chainsaw on a ball bearing!) I made a locking ball stand for chainsaws a few years back.
The stand clamps into a vice or similar and once the CS is mounted it can be moved around over a wide orientation
Too hard to describe but here are some pics of it.


A 1.5" ball bearing is welded onto a shaft and the ball is sandwiched between two steel plates held by 3 bolts - loosening one bold is enough to free the clamping mechanism.
The long bolt is just a handle that turns the clamping bolt
No doubt you can guess what the rest of the holding mechanism was.

Originally Posted by eskimo

some big band saws here

http://www.youtube.com/watch?v=6vZ7D...XjL1VlQTC1Sr4Q

That's definitely a huge mass sawing production. The band saw on the video probably takes 2"wide blade.
( or even wider than 2") . That only means higher running costs but the band saw can do the toughest
cutting job.

Originally Posted by Grahame Collins

Well that's handy then! I'll have to remember that for the very next time I have to saw up a bowling ball. The work holding is a bit suss though!
Methinks that the nice lady in the vid needs to vastly improve her knowledge of band saw operations as an exec in a company that flogs bandsaw blades..

Specifically what i am referring to are the points of contact where the ball is gripped in the vice. That mounting method can slip very easily. When those large blades come off of their own its not fun getting them out of the machine and avoiding a twist in the blade.


I had a 32mm wide blade to remove from a large pipe diameter and a horizontal arm machine after the blade dismounted off the band wheels due to some one else's poor set up.The blade was a throwaway.

A good application for a sawn ball would be as a mount for an engravers vice allowing ease of position change for the vice. Sit the ball in a say,a wheel barrow tire and it could,nt move about.Though, I just would take just enough to mount the vice off the top of the ball.

I think I would be attaching a length of angle to it to give better engagement with the vice jaws. Strangely enough,I do have an old bowling bowl and a bandsaw.HMMMM!

Grahame

Thanks for pointing that out. Actually, when I watched this video, the clamping system was on my very least
concern. I was paying more attention on how the blade would cut through the bowling ball. I never knew what
bowling balls are made of til I saw what's inside of the ball. I think I can use wood band saw blade for it.
Anyway, thanks for the idea.

Originally Posted by Grahame Collins

Strangely enough,I do have an old bowling bowl and a bandsaw.HMMMM!

Grahame

well...we can only wait so long

Originally Posted by Grahame Collins

Well that's handy then! I'll have to remember that for the very next time I have to saw up a bowling ball. The work holding is a bit suss though!
Methinks that the nice lady in the vid needs to vastly improve her knowledge of band saw operations as an exec in a company that flogs bandsaw blades..

Specifically what i am referring to are the points of contact where the ball is gripped in the vice. That mounting method can slip very easily. When those large blades come off of their own its not fun getting them out of the machine and avoiding a twist in the blade.

wonder if the hydraulic variable pressure split vice counteracts for any slippage???
or could it be the material of the bowling ball ?

Originally Posted by eskimo

wonder if the hydraulic variable pressure split vice counteracts for any slippage???
or could it be the material of the bowling ball ?

Hi eskimo,
I have used big saws up to 50mm blades and they had hydraulic vices.
Its more to do with the amount surface contact,which on a spherical object is minimal.With a parallel vice its only 2 very small points of contact on the sphere.

I have had to untangle the mess when someone trying to cut segments from a similar diameter in a stainless steel tube.

OkI i haven't sawed any bowling balls in half. But I have sawed plenty of flat ,section, tubular pipes. to get best cuts,all of which respond to a particular and suitable blade tooth pitch, blade surface speed and blade feeds.

Get that too far wrong and the cut can and will turn to zhit pretty quickly. I will concede that the ball being an plastic product flattened on the contact points to give a bit of grip.

Grahame

Originally Posted by Grahame Collins

Hi eskimo,
I have used big saws up to 50mm blades and they had hydraulic vices.
Its more to do with the amount surface contact,which on a spherical object is minimal.With a parallel vice its only 2 very small points of contact on the sphere.

I have had to untangle the mess when someone trying to cut segments from a similar diameter in a stainless steel tube.

OkI i haven't sawed any bowling balls in half. But I have sawed plenty of flat ,section, tubular pipes. to get best cuts,all of which respond to a particular and suitable blade tooth pitch, blade surface speed and blade feeds.

Get that too far wrong and the cut can and will turn to zhit pretty quickly. I will concede that the ball being an plastic product flattened on the contact points to give a bit of grip.

Grahame

with the split vice..there would be 4 contact points?..and not 2..?