Need info converting Arrow 500 from CAT40 to BT40.
Hello All,
As the title says, I am getting an Arrow 500 and have a lifetime supply of BT40 holders which I would like to continue using. If it's as easy as changing the fingers and adjusting a mysterious height parameter, that would be cool. If it costs more for parts than it costs to re-tool, I guess I'll stick with CAT40.
Thanks in advance for any assistance!
-Sean
Re: Need info converting Arrow 500 from CAT40 to BT40.
Need a new spindle and tool fingers. CAT is better, you can orient a boring bar, or back-facing tool.
Did you get a photo of the serial plate yet?
Re: Need info converting Arrow 500 from CAT40 to BT40.
Surprised about needing a new spindle but you would know. :)
I should be able to visit the machine (3 hours away) tomorrow to get that info. Will the locations be obvious or do I need to hunt for it?
Thanks!
-Sean
Re: Need info converting Arrow 500 from CAT40 to BT40.
Riveted to the outside of electrical cabinet door.
Re: Need info converting Arrow 500 from CAT40 to BT40.
CAT 40 used a blue gripper with different dimensions than the BT-40; BT 40 is a BLACK gripper different dimensions than the CAT-40.
Tool Change height is different due to dimensional differences. Off the internet or tooling website, get two prints; one of the CAT & one of the BT Standards and you'll see the difference.
CAT 40 has a shallow notch and deep key notch as to orient a boring bar or back-facing tool in canned cycles.
Theoretically the BT spindle has two drive keys and not just one. Both are precision balance for MAX RPMs.
Re: Need info converting Arrow 500 from CAT40 to BT40.
Thanks
Yes i know these differences but i cant see what it could hurt to run bt40is in the spindle, it seats nicely and with right knobs the drawbar wont know any difference.
But as you say bt40is usually have 2 keys.
But wont be running it balls to the wall
anyways.
Re: Need info converting Arrow 500 from CAT40 to BT40.
Kwirk,
Regarding the ANSI CAT 40 Toolholder versus the BT 40 Toolholder
Reference Only:
https://www.kemmler-shop.de/en/jis-b...l-information/
https://www.kemmler-shop.de/en/din-6...l-information/
Yes
Different TOOL-STUDS, lengths are different
Different Dimensions for the Tool Grippers in the DRUM,
Different Key Depths,
Different AUTO Tool change Z-Machine Coordinate values.
The only thing that is the same is the Taper-per-Foot.
IF and ONLY if you are going to HAND LOAD the tool; then you can interchange this tooling.
Otherwise you will damage the tool grippers or tool drum which is costly.