Bad news - Broken Part on my VII

[Shop_Smith_Poppi]

Well Last night I needed to drill some holes in a few boards. My battery dill was dead and the charger has disappeared since the fire that destroyed our home in July of 08. My cord drill did not surive that fire either.

So I thought well lets see if the SS will run or not. So I plugged it in and noticed that the speed control was at the highest setting. Its a good thing I have not tried running this machine before now and before finding this forum. I read some where that when powering down your shop smith you need to crank the speed dial to lowest settings.

Guess what!

the backing place that hold the shaft for the cam that mounts to the housing of the gears and stuff. Was pulling away from the machine as i turned it towards the lower setting so much so that it was causing the dial to dig into the housing on one side.

I knew something was just not right here so i did some investigative work and found out that the backing plate which has three slot holes in it that hold it to the housing. Had broken! One of the the slotted holes has lost its slots and will no longer work as it is supposed to.

So I am wondering is this a part that has to found? or can I order it from SS?

PS- I have a picture that I will post later it is on my daughters phone but the battery died before I could get it sent to my photobucket page. should be able to get it on here soon.

[tomlawton]

<edit- this is true for a MkV; is the speed adjuster different in a VII?..> Just a reminder- you were turning the shaft by hand as you wound the speed dial down? Not doing so is injurious to the mechanism- better to start in "Fast" and wind down, where the only risk is a little belt slip, or tripping your breaker! (of course, only do this with no "low speed" accessory attached..!)
The speed dial is still available- from Shopsmith- for only a little more than the price of an eBay "refurb"

[Shop_Smith_Poppi]

yes i was turning the shaft as i dialed it down thanks for your post.

[JPG40504]

Need that picture BADLY! Most of us are NOT very familiar with the VII, and I for one do NOT recognize it from your description.
The VII uses many common parts re speed control, but the parts which do differ are in the area of the speed control dial and the 'stuff' directly behind it and controlled by it. Hence the need for pix to understand what it is and MAYBE come up with a fix(ES).

[Shop_Smith_Poppi]

Ok here is the picture of the broken part on my Shop Smith VII :(

http://i172.photobucket.com/albums/w29/thatdarndawg/Shop%20Smith/193456.jpg

Details of this part are as follows according to the Parts List Manual from ShopSmith for the VII models.

Parts Number : 501332
Part Name: Bracket - Control Assembly
Information found on page 6 for the detailed drawing and page 7 for the part identification.

Notice the broken grooves in the slot on the Lower left slot.

[JPG40504]

IF I understand what I am looking at, the part with the broken out slot attaches to the headstock casting with 3 10-24(3/16-24) self tapping screws and 3 internal tooth lock washers. The slots allow to adjust for a high speed stop(I am assuming high speeds are obtained by turning the dial CLOCKWISE). The other stop(21) is adjusted for a low speed stop. I am assuming the roll pin(26) rides in the groove in the center of (19) and bumps into the "stops" as appropriate.

IF all that is correct, the broken slot can be over come, but with restrictions. A small plate shaped to just fit into the arced groove with 3/16" holes drilled so as to allow the screw to be positioned at several places around the plate. These should be asymmetrical so as to provide finer adjustment by flipping the plate over. The ends of this plate would rest on the remaining shoulder at the ends of the slot. The screw would be inserted through the hole providing the closest positioning of the desired stop(high speed). This is not an easy part to make but it is 'doable'.

I am assuming that the shaft(18), the end of which is visible in your picture as the double flatted object in the bore of the busted part(19), fits into a double flatted hole in the control dial(23) itself. Is this dial/shaft fit 'good'. Does the retaining ring(25) fit into a slot on the shaft(18)?

WHAT is (19) made out of? I hope it is aluminum since it is the entire support for the dial AND the control cam! I have also assumed the control cam(16) is retained on the shaft(18) by the roll pin(17) and that the front surface of the cam rotates against the end of the 'snout' on (19).

Let me know if this 1)is incorrect, 2)in comprehensible or 3)I have totally confused you.

My part number reference(s) are in the VII parts manual(page 6) in the ssug site archives.
Please tell me if I have figured this out correctly and verify the questions I have asked and the assumptions I have made.:)

The part numbers referenced are from the VII parts manual page 6 in the SSUG archives.

[Shop_Smith_Poppi]

Actually you either have a different book or there was more than one type of VII parts book printed.

The piece that i have that is broken has a cone shaped housing on the back side of it that hold the Shaft (30) and is connected to the Cam - Control (31) by a Pin - roll (1/8 X 3/4) (9).

The part that is broken is the Bracket - Control Assembly (29) that has a cone type housing on the back side of it much like that of a transmission but different.

and it can not be filpped over as you suggested. It does how ever have three screws _ tapping ( no. 10 - 24 x 1/2) (6) which connect to the Headstock (41).

I am not sure that you method of fixing it will work as it is made of potted Aluminum.

One other thing I am look at page 6 of the VII parts manual and the drawing of these parts are located in the middle right side of the page.

I could not find a archived copy of the VII on the SS site. Also part names are colored blue and parts reference number to the layout drawing are in red.

[JPG40504]

We ARE in agreement except for the numbers of each part.

I was suggesting flipping the 'new' part, NOT the 'cone shaped part' itself.

The 'new' part would fit into the damaged arc shaped slot and bridge the damaged area. This would be a very small part(the width of the screw head with holes the size of the screw threads and as long as the slot. The holes only need to be in the area where the slot is open. If this is confusing you, I can try to draw up a pix to illustrate.

Temporarily you could hold the damaged piece on the headstock with a longer screw and flat washer. This would allow you to rotate shaft(without knob) to determine if there are any other 'issues'.

I would be concerned about the condition of the threads(in the headstock) located where the screw which normally goes in this damaged slot goes.

The parts manual I am looking at is on ssug.org/(click on Documents Archive in the Main Menu)/Mark VII documents.../Mark VII Parts Manual[Page 6]. The exploded view is on Page 6 and the part # listing is on Page 7.