Cobra Class 4 & kydex plastic?

[DieselTech]

Guys & gals in feburary or march I'll be getting a new cobra class 4 sewing machine. 

My question is will it sew thru kydex plastic used in holsters & knife sheaths? 

Will it sew thru a plastic bicycle seat pan? Some type of flexible plastic. No sure what yet thou. 

Thanks any & all help will be greatly appreciated.

[PeterinID]

I don't think it will sew through either, not uniformly or reliably. I think you would snap needles and crack plastic. If you drilled holes that matched stitch length you might possibly get ok results.

[AlZilla]

There's a youtube video of Alexander Dyer using a Cobra class 26 and sewing canvas to plywood. I think it'll sew kydex.

[DieselTech]

48 minutes ago, PeterinID said:

I don't think it will sew through either, not uniformly or reliably. I think you would snap needles and crack plastic. If you drilled holes that matched stitch length you might possibly get ok results.

Yeah I was curious because Cobra said it will sew thru plastics with the correct needle selection. I was just trying to get a idea on how thick of plastic & what types of plastic. 

Thanks. I appreciate it.

[DieselTech]

40 minutes ago, AlZilla said:

There's a youtube video of Alexander Dyer using a Cobra class 26 and sewing canvas to plywood. I think it'll sew kydex.

I'll have to see if I can find that video, I would like to see how the cobra class 26 does.

I would think if the Class26 can do that, then a class 4 will surely punch thru kydex, with the correct needle selection. 

I appreciate your time & knowledge. Thanks.

[AlZilla]

45 minutes ago, DieselTech said:

I'll have to see if I can find that video, I would like to see how the cobra class 26 does.

I would think if the Class26 can do that, then a class 4 will surely punch thru kydex, with the correct needle selection. 

I appreciate your time & knowledge. Thanks.

 

[DieselTech]

1 hour ago, AlZilla said:

 

Thanks appreciate that. Much appreciated.

[DieselTech]

They should use that as a promotion video. That's pretty amazing. 

[nylonRigging]

On 12/13/2023 at 4:49 PM, DieselTech said:

Guys & gals in feburary or march I'll be getting a new cobra class 4 sewing machine. 

My question is will it sew thru kydex plastic used in holsters & knife sheaths? 

Will it sew thru a plastic bicycle seat pan? Some type of flexible plastic. No sure what yet thou. 

Thanks any & all help will be greatly appreciated.

I do some internal stiffing plates in panels with some of sew designs i sell using thicker than what is used in Holster construction. Holster kydex/ABS is pretty thin stuff . You going to sew threw it like butter even with using a lot smaller sew machines than the bigger class4 .
The ABS plastics are more rigid and harder material as you go thicker. You will still punch threw no problem . Your Polyethylene plastic sheets are easy 'smoother' on the needle and nicer to so threw. I think the Polyethylene less abrasive on the thread than the harder ABS, and easy to tension look good.

All depends on what you making/sewing and type, thickness..etc. but Always keep in mind that the weakest point for bend fatigue crack/breakage, will always be the sew line threw in the plastic, the line of 'holes you punch' .
.

edit add: .. I seen old singer class7 sew threw silver dollars... LOL

.

Edited December 15, 2023 by nylonRigging

[AlZilla]

12 hours ago, nylonRigging said:

I seen old singer class7 sew threw silver dollars...

I sometimes tell people I could sew a fender on my car with the 441 clone. Maybe I'm not exaggerating!