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Old 09-10-2019, 11:34 AM   #1 (permalink)
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Holes for dimple dies

Just curious how you guys are making holes in sheet metal for dimple dies that do not have the punch built in? Currently, I am using Morse bi-metal hole saws with chunk of 1x4 with varying sized holes pre-drilled that I clamp to my sheet metal to act as a guide to prevent the hole saw from walking. I have dimple dies in 1/4" increments from 1/2" to 2 1/2". In my electrician days, we used Greenlee knockout hole punches, but those are conduit sized. I have struck out on finding knockout punches in actual standard sizes. A CNC plasma table is not an option for me at this point anyways. Anyone have a quicker/cleaner/easier way of making holes? Thanks!!
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Old 09-10-2019, 12:48 PM   #2 (permalink)
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I use step-drills as much as possible, makes perfect round holes.

For the larger ones I use hole saws with centre drill in my drill press, works really good.
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Old 09-10-2019, 03:58 PM   #3 (permalink)
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Quote:
Originally Posted by Benton Speed & Fab View Post
Just curious how you guys are making holes in sheet metal for dimple dies that do not have the punch built in? Currently, I am using Morse bi-metal hole saws with chunk of 1x4 with varying sized holes pre-drilled that I clamp to my sheet metal to act as a guide to prevent the hole saw from walking. I have dimple dies in 1/4" increments from 1/2" to 2 1/2". In my electrician days, we used Greenlee knockout hole punches, but those are conduit sized. I have struck out on finding knockout punches in actual standard sizes. A CNC plasma table is not an option for me at this point anyways. Anyone have a quicker/cleaner/easier way of making holes? Thanks!!
Get dimple dies in conduit sizes. Duh!
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Old 09-10-2019, 03:59 PM   #4 (permalink)
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https://www.trick-tools.com/Punch_Flare_Tools_76
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Old 09-10-2019, 06:35 PM   #5 (permalink)
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SWAG makes dimple dies for the knockout punches, and knockout punches for standard sizes....

https://www.swagoffroad.com/SWAG-Dim...-Set_c_56.html
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Old 09-10-2019, 08:15 PM   #6 (permalink)
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Yup... get the knockout sized dimple dies for the HF hydraulic knockout punch. Then you can use the hydraulic cylinder for the knockout as well as the dimple dies. And upgrade the hand pump to an air over hydro pump as well to really make it easy!
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Old 09-10-2019, 08:57 PM   #7 (permalink)
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I picked up a couple of Blair Rotobroach sets from Amazon after reading about them on here somewhere. I will never use a holesaw on sheetmetal again. Hell even thicker steel they cut like butter. Well worth the money and they weren’t stupid expensive.

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Old 09-10-2019, 10:21 PM   #8 (permalink)
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Like it was mentioned, swag makes knock outs in you sizes.

Im sure he doesn't want to spend another $500 on new dimple dies just to use standard knock outs.
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Old 09-16-2019, 08:13 AM   #9 (permalink)
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Thanks for the responses guys. I was not aware SWAG released a set of standard knockout punches yet in tube size! I check their site often, but missed this. Has anyone used their knockout punches yet? If so, how are they holding up? They seem fair priced. I will likely go this route. Thanks again!
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Old 09-16-2019, 10:33 AM   #10 (permalink)
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before getting a CNC plasma i used this worked great

clicky

its metric, but left just the right amount of gap i never have issues with the dimple die getting pinched
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Old 10-02-2019, 10:31 AM   #11 (permalink)
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New Dimple dies now available at Woodward-Fab

2 way dimple dies now available at Woodward-Fab.com
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Old 10-02-2019, 11:33 AM   #12 (permalink)
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2 way dimple dies now available at Woodward-Fab.com
Impressive advertising. Maybe next time you will get your own website correct.
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Old 10-02-2019, 12:06 PM   #13 (permalink)
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Impressive advertising. Maybe next time you will get your own website correct.
i laughed.
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Old 10-18-2019, 09:40 PM   #14 (permalink)
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I used hole saws then found these:
https://www.911motorsports.net/Circl...-5pc_p_12.html
Theyre badass!
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