Mark VII Table Reassembly

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The Mark VII differs from the Mark 5/V in that the extension table will also slip into bores under the main table and thus also extend the width of the main table. More about that later.

Starting with some simple(and familiar) things, the tilt scale and detent pin are attached first.

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The longer screw also acts as a retainer for the detent pin. The screw passes through the cutout portion of the detent pin. Since these are self tapping screws, care must be taken to insure they are fitting into the original threads.

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The scale is to be adjusted later.

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When the trunion clamp screws were removed, both(front and rear) screws were bent. I believe a PO's attempt to secure the screws by peening them caused the bend. The screw in the hole verifies to me the need for them to be straight. The screw remains centered in the segment slot at all angles of 'tilt'. The Mark VII has both a front and a rear trunion clamp. They are identical. This is the rear clamp and does not have a tilt angle index.

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Not as obvious in this pix as I had hoped, but the screw is bent at the inner end on the threads to the left(the end that screws into the trunion). I spent way too much time mulling over how to straighten them. I was concerned re thread damage. In the end, I placed the course end into a large vise, ran a nut onto the fine thread end, and whacked the nut with a wooden mallet. The screw is actually a square bar stock with threads cut into the four corners. So the vise clamped onto the flat part and no thread damage occurred. Not perfectly straight, but much improved and 'good nuf'.

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This thread is linked to from https://forum.shopsmith.com/viewtopic.php?t=11984

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The boss that the rear of the trunion segment presses against has wear and more staking by a PO. I want to 'overcome' both problems.

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First thought was to add a washer, but it's thickness leads to requiring further alterations/spacers.

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So a thin mylar washer was 'created' from a sheet.

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The screw was secured with blue locktite.

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The remaining washer, nut, lever and retaining collar are added to the screw. I neglected to take a pix at this point, but I did use blue locktite on the threaded stop collar.

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The same steps were taken to assemble the rear trunion lock. The Mark VII requires manual locking of both segments separately(not as convenient as a 505...520).

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This pix was taken later, but it shows the blue locktite applied to the stop collar threads.

[ATTACH]21447[/ATTACH] <<<< SEE POST #7 This thread

Now for some more challenging 'fun'. I heated the trunion to get the posts removed, but I did not want to torch the new paint, so I chilled the posts in the freezer for several hours. The first attempt went smoothly until I attempted to line up the trunion and post holes. At that point I discovered that in spite of marking both the posts and the trunion, that I had inserted the wrong post. So the torch was again used to heat the trunion for 'post removal' again. This explains the scarring of the paint. This shows the 'correct' post being inserted.

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This time the holes were more cooperative, but needed tweaking.

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A pointed awl and mallet provided the necessary persuasion.

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This looks better.

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The trunion holes are slightly larger than the post holes. The pins are a tight fit into the post holes. The pins are swaged to provide a wedge fit into the larger trunion holes. There are two pins per post on opposite sides.

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After starting the pins on both sides, I used a small vise to squeeze them in place. The span of the pins required me to use the inset at the top of the jaws.

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Then the vise was moved to allow fully seating the pins.

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The two tilt stop screws(90 and one 45) were installed. The 45 will be difficult to adjust with the table on the trunion, but I prefer the non slotted end of the screw pressing against the stop pin. These screws are 'nylock' impregnated so adjusting them requires considerable torque. As such they should not move on their own! Looks like I need to touch up some paint scaring.

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On to mounting the fence rail extrusion to the front of the main table. Three screws and split washers just like a Mark 5/V. The rail was pushed tight against the front edge of the table.

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A short rail is mounted to the extension table.

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And another to the second 'front'. This second front is used when the extension table is mounted in the spt mount like other models. Again they are pressed tight against the 'front' edge of the extension table.

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The trunion has slotted holes for the screws and thick washers that secure the table. For starters I centered them over the holes.

[ATTACH]21459[/ATTACH] <<<<< see post #7 this thread

Ditto for the rear segment. This arrangement adds a step to table alignment. In addition to positioning the table on the trunions for blade alignment, each trunion must be positioned so as to align the pivots so smooth bindless tilting occurs.

This pix shows the extension table tight against what is normally the right side of the main table. Notice the extension table tubes extend past the 'normal' blade opening. This justifies the secondary blade slot. Later pix will show the extension table pulled away from the main table. Notice the small holes where the extension table tubes are inserted. Those 1/4-20 tapped holes are for securing the extension table. I will probably use 520 rail/tube knobs there.

[ATTACH]21460[/ATTACH] <<<<< see post # 7 this thread

Musta done something right since it fits into the Goldie carriage. The Mark VII post gear teeth are on the opposite side so we are looking at the rear of the Mark VII table.

[ATTACH]21461[/ATTACH] <<<<< See post #7 this thread

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Nothing new here! Insert identical to Mark 5/V 500.

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The table width becomes 24" with the extension table pulled out.

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The table depth is 21 ".

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The gap when the extension table is pulled out.

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A comparison of the rip fence lengths. Mark 5/V 500 on top, Mark VII in the center and a 510 fence in front. Small, medium and large so to speak.

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The table tilt lock stop collar should not be screwed down flush with the end of the screw. It should provide more clamp in/out clearance as shown here.

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