Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 15 of 22
Thread: Small job - riving knives
-
24th June 2011, 04:06 PM #1Member
- Join Date
- Jan 2010
- Location
- Sydney
- Posts
- 63
Small job - riving knives
Hi all
This is my first post in the metalwork section so apologies if this is the wrong area. I would like two riving knives made for my table saw as I am currently experiencing a few issues with the one I have (and don't currently have a thin kerf riving knife anyway). I am willing to pay for each (please let me know what you think is fair) and also happy to send a trace of the riving knife via post to you (photo with scale as attached). I am after the following:
1 x 2.5mm thick riving knife
1 x 1.5 mm thick riving knife
Any help would be greatly appreciated as I would like to use my table saw, but am currently nothing but frustrated! Please PM what you think is fair for the work (I have no idea) if you are interested and I'll proceed from there.
Cheers
James
-
24th June 2011 04:06 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
25th June 2011, 12:37 PM #2danielson
- Join Date
- Dec 2009
- Location
- broadford
- Age
- 63
- Posts
- 237
hi mate,first thoughts are go to a laser cutters and get a quote for the two thicknesses,shouldnt be a great deal.keep the program and you can get them cut in mild steel,ssteel,brass alli and in any thickness you want.my cutter in melb would probably do it for around30 to 40 dollars for me.
-
25th June 2011, 11:07 PM #3China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 4,475
Thats cheap in SA it would cost $50.00+ just to set up the program then the cutting cost would be added
-
26th June 2011, 01:16 AM #4Member
- Join Date
- Jan 2010
- Location
- Sydney
- Posts
- 63
-
26th June 2011, 01:30 AM #5
Hi James,
The only critical dimensions I imagine would be the thickness, and the arc that follows the saw blade. If that's the case, why not just hacksaw or grind and file it out of some sheet stock.
Do you have a preference for material, mild steel, aluminium, brass?
Regards
Ray
-
26th June 2011, 01:38 AM #6Member
- Join Date
- Jan 2010
- Location
- Sydney
- Posts
- 63
Hi Ray
It is all a matter of expediency for me right now. I probably could go and do that, but I would have to invest more time than what it is worth to source the steel, buy the files to then file down the knives without a way to clamp it as I need the saw working properly to build my bench!
The DIY path is what I will go down should this fail; however I'd prefer the quicker and more precise option albeit at a higher cost. I am looking at steel as the material for this as I don't trust aluminium and brass to hold up to the task at that thickness (please advise if that is incorrect).
Cheers
James
-
26th June 2011, 01:50 AM #7
-
26th June 2011, 08:16 AM #8SENIOR MEMBER
- Join Date
- Aug 2003
- Location
- Wodonga
- Age
- 59
- Posts
- 707
How thick should the riving knife be in relation to the blade it is behind. If the blade is 2.0mm with the teeth 2.25mm thick what should the riving knife be.
To thick and it jams and too thin and the back of the blade could start binding on the wood.
I need to make a knife to go with a thin kerf ripping blade I have.
-
26th June 2011, 10:19 AM #9
The riving knife does need to be of steel, and preferably spring steel. Any tendency for the saw to kickback can only be countered by the knife, and it needs to have resistance to being bent or twisted.
While I almost always take a DIY approach to life, I'm wondering if your saw dealer offers knives in the correct thickness for narrow kerf blades?
GregIt's all part of the service here at The House of Pain™
-
26th June 2011, 10:20 AM #10GOLD MEMBER
- Join Date
- Aug 2007
- Location
- Saskatoon, SK, Canada.
- Posts
- 1,439
For what it's worth I have a SawStop saw and the riving knife that comes with it is 2.0 mm and if I remember correctly the original blade was a touch under 1/8" (3.0 mm). I have a Forrest standard blade in it that is .125 (3.2 mm) and also their thin kerf blade of about .093 (2.36 mm). Both work with the 2 mm knife but I can't say if it is the optimum for both blades. Maybe some digging in the European regulations would give better info as they are very strict about such things.
Pete
-
26th June 2011, 02:40 PM #11Senior Member
- Join Date
- Sep 2007
- Location
- Country West Oz
- Age
- 77
- Posts
- 201
I made a thin riving knife out of an old saw blade, the type without the TC tips, I think it is about 2mm thick, anyway it has been on the saw for years and works a treat.
Regards
Bradford
-
26th June 2011, 03:58 PM #12
-
26th June 2011, 06:16 PM #13Member
- Join Date
- Jan 2010
- Location
- Sydney
- Posts
- 63
Thanks all for the replies. I've done a little bit of reading (no regulation, just forums) about it and it does not appear a hard and fast rule the riving knife should be exactly the width or a hair under, which is why I have chosen 2.5mm and 1.5mm. My Freud blade is stated as 1/8" (3.175mm), however is actually 0.118 (2.997mm). That spare 0.178mm is less than the clearance on my original riving knife at a thickness of 3.1mm. After a significant amount of frustration I found out where the problem was and arrived at the requirement for a more forgiving riving knife.
Ray, having just come on now I will draw the specs up. Do you use SketchUp?
Cheers
James
-
26th June 2011, 06:50 PM #14
Hi James,
Sketchup is fine. I think you can post the files as attachments here. If not PM them to me.
Regards
Ray
-
26th June 2011, 07:20 PM #15Member
- Join Date
- Jan 2010
- Location
- Sydney
- Posts
- 63
Quick bit of SketchUp
Ray
As mentioned here are the dimensions. The inner radius has a slight 20 degree bevel on each side, however I would be able to grind that with my fake Dremel. Ideal material is high carbon steel, however I'm sure mild steel will do the job fine! Please PM me price per knife inc. postage. If I have missed any dimensions please let me know or open up the attached SketchUp file.
Cheers
James
Similar Threads
-
Riving knife
By WhatsWood? in forum SAFETYReplies: 7Last Post: 21st August 2009, 06:30 PM -
Riving Knife
By Big Shed in forum TABLE SAWS & COMBINATIONSReplies: 15Last Post: 24th October 2007, 11:15 PM -
Riving Plate
By Alfred in forum TRITON / GMCReplies: 16Last Post: 8th September 2005, 06:03 PM -
Riving Knife not parallel
By Pestmaster in forum TRITON / GMCReplies: 5Last Post: 15th January 2005, 02:32 PM -
Riving Knife - Splitter ??
By silentC in forum HAND TOOLS - POWEREDReplies: 8Last Post: 15th October 2004, 03:14 PM