Shop Press Punch Table - Making the Table

[@GregsGarage]

I'm learning something every video. Thank you for sharing.

[@craigsmachineshop2040]

You and me both. Lol. Thanks.

[@stefanhertweck]

Hello Craig, nice build. When I countersink, I use very low revs (from 150 to 250 1/min) and also low feed. Otherwise you likely will experience chatter that shows up on the surface.

[@craigsmachineshop2040]

Thanks Stefan! Not sure if I will have much power at that RPM since I only have 1 HP with a VFD. I will give it a try and see, thanks!

[@stefanhertweck]

​@@craigsmachineshop2040 I have the same problem i.e., not enough torque at low revs. But for me, slow revs and a solid clamp of the part provide a good surface. When you run at slow revs you can/need to adjust (typically lower) the feed rate (reduces power/torque demand). You might want to check if your VFD can beef up the current/torque in low revs (some can, esp. the ones with rev independent cooling). When you watch the countersink in action, it sounds like carving out the material. When I countersink large diameter holes (e.g. >20 mm or >3/4" outer countersink diameter) , I take even lower revs. In such cases, I might need to adjust the revs & feeds to hit a "sweet spot" setting to avoid spindle stop due to low torque/current. Clearly, the kind of tool (sharp, dull etc.) also plays into this.

[@craigsmachineshop2040]

Yeah, sounds like something you just have to play with till you find out what works best. Thanks!

[@donno1967]

Well Done !

[@craigsmachineshop2040]

Thanks!

[@kentdixon5716]

Hey really enjoyed your video, looking to make something very similar. Could you tell me what model Uni Punch your using, and also what size shop press? thanks very much Kent.

[@deanneufell3284]

just thinking out loud.....turn the whole thing 90 degrees. Bolt a pc of steel on the bottom of your table to fit between the 2 "c" channels.(tongue and groove) Then it will be very quick to load into the press and very stable. Weight will then be balanced and not hanging off the back. Awesome press punch so far :)

[@craigsmachineshop2040]

Thanks, good idea!

[@ecdezz]

Very nice! Thanks for the plug too :)

[@multiHappyHacker]

Might try 1250 rpm, 3 ipm on that chamfer tool.

[@craigsmachineshop2040]

Thanks, I will give it a try. When you countersink, do you calculate the feeds and speeds as a drill bit or an end mill? I don't see a countersink or chamfer in G-wizard.

[@multiHappyHacker]

@@craigsmachineshop2040 That's a recipe I modified from provencut for use with a combination drill and countersink, but it should be the right ballpark.

[@gunracksonline]

if the short post ends up causing a issue, just get a piece of shim stock the thickness you would need to make the corners equal. Then put it on the short post.

[@craigsmachineshop2040]

Thanks! Yeah, maybe cheaper and faster than a new standoff.