Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: Tear out and chipping when cutting plywood  (Read 3328 times)

dave parker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 197
  • Location: Stockton on Tees
Tear out and chipping when cutting plywood
« on: January 17, 2020, 08:20:54 pm »

i have just cut out my springer hull prices from 6mm plywood and have got a lot of tear out and chipping along the edges, only on the top side though


I think I may have the wrong jigsaw blade


Is this a common thing?


Obviously it can be fixed later when sanding and filling the hull for paint


Any suggestions?
Logged

grasshopper

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 776
  • Location: Lincolnshire!
    • A1 Hobbies Ltd.
Re: Tear out and chipping when cutting plywood
« Reply #1 on: January 17, 2020, 08:37:43 pm »

A finer blade with a slower feeding of the work piece into the blade,
Running a sharp blade along the intended cut line, then sawing away from the line and sanding to it.



Logged

RST

  • Guest
Re: Tear out and chipping when cutting plywood
« Reply #2 on: January 17, 2020, 08:59:52 pm »

Put masking tape over the cut on the pull side of the blade. If the line isn't visible enough when cutting re-trace it. You'll almost always have an "edge" when cutting.
Logged

tonyH

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,380
  • Model Boat Mayhem Forum is the Best!
  • Location: Suffolk, England
Re: Tear out and chipping when cutting plywood
« Reply #3 on: January 17, 2020, 09:46:07 pm »

Reverse the sides so the decent sides are on the inside. It's common, especially if the ply is a tad old. :-))



Logged

Colin Bishop

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 12,357
  • Location: SW Surrey, UK
Re: Tear out and chipping when cutting plywood
« Reply #4 on: January 17, 2020, 10:12:13 pm »

I usually use a hacksaw blade in a jigsaw when cutting plywood. It gives a better cut.

Colin
Logged

dave parker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 197
  • Location: Stockton on Tees
Re: Tear out and chipping when cutting plywood
« Reply #5 on: January 17, 2020, 10:26:32 pm »

Thanks Tony, that’s a good idea, then prep he outside before paint


Thanks Colin, sounds interesting. Do you cut the blades in half before fitting in to jigsaw?
Logged

Colin Bishop

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 12,357
  • Location: SW Surrey, UK
Re: Tear out and chipping when cutting plywood
« Reply #6 on: January 17, 2020, 10:33:07 pm »

I use jigsaw hacksaw blades. The fine toothed ones.

Colin
Logged

chas

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 613
  • now in los montesinos Spain.
Re: Tear out and chipping when cutting plywood
« Reply #7 on: January 17, 2020, 11:36:01 pm »

With dodgy wood I cut outside the line and sand back to where I need to be.
Chas

Logged

tigertiger

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 7,775
  • Location: Kunming, city of eternal springtime, SW China.
Re: Tear out and chipping when cutting plywood
« Reply #8 on: January 18, 2020, 02:51:41 am »

There are special jigsaw blades for cutting plywood.
They have a higher number of teeth per inch (TPI), and they have a slimmer blade to make cutting curves easier.
They are not expensive.
If you use masking tape, the blue stuff has a glue that should not leave a residue.
Logged
The only stupid question is the one I didn't ask

canabus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,352
  • Boats a hole in the water you pour money into!!!
  • Location: Tasmania,Australia
Re: Tear out and chipping when cutting plywood
« Reply #9 on: January 18, 2020, 07:15:06 am »

Hi Guys
I use Makita double cut blades which a cut like a planner blade.
Two numbers on the packet No.10S and A-85824.
My Makita is an old one, but they have blades for the newer ones.
TOTALLY RECOMMEND THEM !!!!!
All my old wood cutting blades are in the rubbish bin.

CANABUS
Logged
Pages: [1]   Go Up
 

Page created in 0.081 seconds with 21 queries.