Thread: Motorised Chisel back flattening - taking the grunt work out of it

I just spent a hour making one of these. It works, but I think it will kill my drill very quickly. The drill needs quite a bit of torque. My 710W ozito hammer drill doesn't have enough torque at low revs and it just bogs down as soon as I apply pressure to the chisel on the plate. My cordless makita drill/driver has plenty of torque down in low revs, but the motor is labouring. High RPM just shakes the entire bench, and makes one hell of a racket!

Mine is just made from 12mm MDF, its what I commonly make my jigs and templates from. A baseboard with two strips to hold the slider inline, the strips are dovetail. The slider has matching dovetails. When assembling, I made sure to leave some clearance around the slider so it doesn't bind, two masking tape thickness worth of clearance. Gave it all a wax and buff and its pretty slippy. The plate is just double-sided taped to the mdf slider, I was eager to test it.

Using the 140grit diamond, it actually grabs the chisel and you end up rocking back n forwards with the movement of the plate, need somewhere to lock your arms in so they are rigid.

101_0249.jpg101_0250.jpg

All in all, its a fantastic idea. My attempt needs some fine tuning and alot of thought about how to make it without it killing a drill/driver.

Originally Posted by Kuffy

My attempt needs some fine tuning and alot of thought about how to make it without it killing a drill/driver.

What about using an old jig saw or angle grinder?

Originally Posted by jhovel

Brett, what speed (strokes per minute) does it oscillate now? Would you please do a little video and put it on Youtube for us to look at?

I'd say about 200 rpm Joe.

I've never uploaded anything to Youtube. Do you have to have a channel or something? I have uploaded a vid to Dropbox once but they pulled the pin due to "excessive traffic" or some nonsense.

You can upload straight to the forum. I did one of Sammy in the shed today. I think it worked?

Dave TTC
Turning Wood Into Art

Originally Posted by Kuffy

The drill needs quite a bit of torque.

Yes indeed. I'm using a 750w Protool with 65Nm torque. Low gear. I would think a drill press would be ok.

I was thinking one of these could be used today ????

As the drive unit


Just my $2.57 plus GST worth

Originally Posted by Simplicity

I was thinking one of these could be used today ????

As the drive unit

(pic of recipro saw)

In response to Joe:

Originally Posted by FenceFurniture

Seeing your recipro saw lying there reminded me - I briefly flirted with an idea for that moving the plate back and forth, but quickly realised I didn't have enough hands, and building something to hold the saw still would be tricky. It would also be too fast with it's recipro motion (like me, I'm told ).

Yes Grasshopper, great minds think alike!

Originally Posted by FenceFurniture

In response to Joe:
Yes Grasshopper, great minds think alike!

Bugger
For a moment I was going to join
Mensa

Joe, I have shot the video, and now just trying to determine if they can actually be uploaded here (I'm thinking not).

Originally Posted by FenceFurniture

Joe, I have shot the video, and now just trying to determine if they can actually be uploaded here (I'm thinking not).

You can. I uploaded this one using tapatalk

Shed time

There must be a way to do it from a regular browser too

Dave TTC
Turning Wood Into Art

With a bit of luck......

Motorised Chisel Flattening

Well,that embed didn't work, so here's a link that might:

https://youtu.be/y1i-XQ7ceF0

Links not working for me

Dave TTC
Turning Wood Into Art

Both worked for me
With taptalk on a iPhone

Try it now. This has caused an unbelievable amount of grief and all I want to is eat. Bloody Google and Adobe! Shoving their noses in where it's not needed.