Squish band cutting questions

[Outback]

I've done a couple of cylinders on my lathe with popups and now I want to compare cut chambers. I've got an indexing boring bar on the way and a long reach horizontal indicator. I was looking at 1" x 4" t6 flat bar to make mounting plates out of. Too thick or just right? Wider? Is all thread with nuts the way to go or can I get away with cap screws into threaded t6 as they aren't tightened heavily. How tight are you guys cinching them down? How much torque to break a corner of the base off generally? Any advice, tips, or tricks to cut down on first time errors would be appreciated. Thanks guys.

 

[Deets066]

I think people use all thread with nuts top and bottom of base

 

[angelo c]

I use a belt sander....yup for squish and base cutting..

I feed my family wit dis chit. Been sanding since before electricity was made.

JMS

 

[Moparmyway]

I've done a couple of cylinders on my lathe with popups and now I want to compare cut chambers. I've got an indexing boring bar on the way and a long reach horizontal indicator. I was looking at 1" x 4" t6 flat bar to make mounting plates out of. Too thick or just right? Wider? Is all thread with nuts the way to go or can I get away with cap screws into threaded t6 as they aren't tightened heavily. How tight are you guys cinching them down? How much torque to break a corner of the base off generally? Any advice, tips, or tricks to cut down on first time errors would be appreciated. Thanks guys.

I use 4” x 3/8 flat steel and tap the holes for threaded rod. 5mm, 6mm, and 1/4” is mostly what I’ve used. Nuts with washers to protect the base. Sometimes you have to crank down ......knowing when to loosen is just as important as knowing when to tighten

 

[Termitebuffet]

I use 4x4 by 3/4" aluminum, plate ...drill and tap for 10-24 threaded rod , nuts hold cylinder base

 

[Derf]

3/8 aluminum plate and tapped for threaded rod. Nuts on the rod with lock washers. Cinch down till lock washer is @ 90% flat. Then adjust with indicator till true. Cutting aluminum is pretty soft, so the cylinder won't move when boring. Just make sure it isn't moving by pushing on it with your hand.

 

[Outback]

Belt sander pshhh, If you were a JMS man you would have cut that base on the live great white shark you keep in your butthole shaped backyard pond. .

Interesting, Thank you all for answering. Sounds like I am trying too hard with 1". The consensus is going with a stronger stud/nut setup.

The thing I've noticed with aluminum is that you have to have the speed up on the lathe or the cut isn't clean, it gets kind a foggy from tearing instead of cutting the aluminum.

Again, thanks for the help.

 

[Adirondackstihl]

High speed.....low feed.....cutter geometry

 

[Moparmyway]

Ummmmm ......
I run about 325 rpm, thats the lowest mine will spin. It’s not a constant cut, you have to also consider that if a cylinder isn’t balanced, the fastet that you try to spin it, the more your whole machine can vibrate or shake

 

[Termitebuffet]

I use 4x4 by 3/4" aluminum, plate ...drill and tap for 10-24 threaded rod , nuts hold cylinder base

I lied ...it's 1/2"

 

[Termitebuffet]

High speed.....low feed.....cutter geometry

Math

 

[Jimmy in NC]

Math

Is that like road signs... I missed one today. ... about 6 miles south of town I realized.

Sent from my SM-G920V using Tapatalk

 

[Termitebuffet]

Is that like road signs... I missed one today. ... about 6 miles south of town I realized.

Sent from my SM-G920V using Tapatalk

Yeth ...almost exactly [emoji106]

 

[twinstaged]

You will never regret and over rigid setup or fixture. Over build it as much as you like.
Get a good set of honing stones or ez laps. Very sharp high speed steel lapped with a small nose radius will cut really nice. Put it on the stiffest or largest boring bar you have. It will cut better then the normal carbide I see people using and it's cheap unless you prefer buying hss inserts are specific aluminum carbide inserts.

 

[Adirondackstihl]

Math

I forgot
You don’t math
My sorry

 

[Termitebuffet]

I forgot
You don’t math
My sorry

Just plain ol engrish. ...[emoji106]

 

[Adirondackstihl]

Just plain ol engrish. ...[emoji106]

Barely

 

[Termitebuffet]

Barely

Whale....you gottz a point

 

[thomas1]

 

[twinstaged]

That is the Bible. I've also recently got a copy of the engineers black book which has a lot of great reference material in it. Deciphers all the carbide codes with nice pictures.