Nick/Drew's Thickness Jig question

kd6vpe · Post by **kd6vpe** » Sun Jan 04, 2009 9:30 am

Hello,
I just got my Conical Disk and have a question on building the Thickness Jig from the saw dust sessions. There is a support piece 3/4" stock that is 1 -1/53" high to form the 5 degree slope required for the jig to work does anyone know what the bevel is on the top of this piece is? Would that be 5 degrees? I know this might be a stupid question but I have done some stupid things in my learning and have decided to ask before I mess up anything new again. Thanks in advance. You ask what stupid I used my flat disk to do some thickness sanding and boy can the disk shoot wood out quickly if you put to much pressue on the piece. No damage but not doing that again have to try this jig.

JPG · Post by **JPG** » Sun Jan 04, 2009 10:48 am

Where did FIVE degrees come from?????

The table angle Normally is set to FOUR degrees(=square to conical disk).

I don't remember "Nick's jig" so take this with a grain of salt as to whether it is relevant to the jig.

P.S. Re flat disk thickness sanding...Did you bias the fence so outfeed(back/moving upward) side has clearance?.....adjust screw on right side of fence toward table on 500..5x0(don't know)

8iowa · Post by **8iowa** » Sun Jan 04, 2009 11:21 am

In one of the older editions of PTWFE, DeChristoforo described how "edge" sanding could be accomplished using the flat disk and an offset fence. This was before the days of the conical disk sander. I tried DeChristoforo's method, with mixed results. The conical disk provides much better results.

a1gutterman · Post by **a1gutterman** » Sun Jan 04, 2009 11:39 am

kd6vpe wrote:Hello,
I just got my Conical Disk and have a question on building the Thickness Jig from the saw dust sessions. There is a support piece 3/4" stock that is 1 -1/53" high to form the 5 degree slope required for the jig to work does anyone know what the bevel is on the top of this piece is? Would that be 5 degrees? I know this might be a stupid question but I have done some stupid things in my learning and have decided to ask before I mess up anything new again. Thanks in advance. You ask what stupid I used my flat disk to do some thickness sanding and boy can the disk shoot wood out quickly if you put to much pressue on the piece. No damage but not doing that again have to try this jig.

Hi Jim,

I am a bit confused. I do knot see a jig when Nick is using the conical disk for thickness sanding: http://www.shopsmithacademy.com/SS_Archives/SS101/SS101_ConicaL_Sander.htm

Can you tell me where to look for it?

kd6vpe · Post by **kd6vpe** » Sun Jan 04, 2009 11:54 am

8,
Thanks I will look that up and see what is there I always forget about that darn book it has so much information in it.
Tim,
It was session #12 and the plans where on the blackboard.

Thanks guys I think it will be 5 degrees. I will go on that assumption for now. I need to do some thickness sanding on the rocking horse I'm working on and this is the perfect opportunity to try this jig, the SS sale was what made this all happen. I will report back on what happens thank you all for the help.

a1gutterman · Post by **a1gutterman** » Sun Jan 04, 2009 12:00 pm

I just went to SS#12 and still can knot see anything on the conical disk, including the blackboard plans. http://www.shopsmithacademy.com/SS_Archives/SS112/SS112_Index.htm

What am I missing??

edit: It is SS#14. Am viewing it now.

a1gutterman · Post by **a1gutterman** » Sun Jan 04, 2009 12:11 pm

Jim, I think you are right about the 5 degree angle! Looking at the pdf plans, it shows that angle!

kd6vpe · Post by **kd6vpe** » Sun Jan 04, 2009 12:17 pm

MYbad,
It session #14 good grief sorry for the confusion.

dusty · Post by **dusty** » Sun Jan 04, 2009 12:53 pm

kd6vpe wrote:Hello,
I just got my Conical Disk and have a question on building the Thickness Jig from the saw dust sessions. There is a support piece 3/4" stock that is 1 -1/53" high to form the 5 degree slope required for the jig to work does anyone know what the bevel is on the top of this piece is? Would that be 5 degrees? I know this might be a stupid question but I have done some stupid things in my learning and have decided to ask before I mess up anything new again. Thanks in advance. You ask what stupid I used my flat disk to do some thickness sanding and boy can the disk shoot wood out quickly if you put to much pressue on the piece. No damage but not doing that again have to try this jig.

You are correct in that the jig is built to introduce a 5 degree slope. It is also true that the conical disc introduces a 4 degree slope. Nick explains in the Sawdust Session (#14) that this was done on purpose knowing that a builder would probably not get an exact 4 degrees and would have to adjust the table tilt to acquire proper alignment.

Why did he not built it 3 degrees off then, why 5 degrees. Well, because in the vertical drill press mode the table only tilts one direction. Building it deliberately at 5 degrees (or greater) improves ones chances of being able to adjust out the builtin error.

I hope that makes sense.

charlese · Post by **charlese** » Sun Jan 04, 2009 12:56 pm

Conical disk has a 4 degree slope. Jig has a 5 degree slope. Here's the blackboard item.- -
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Nick/Drew's Thickness Jig question

Nick/Drew's Thickness Jig question

5 degrees??????