Shop Fox D3347 Cam Clamp

I bought these clamps after battling to find a low profile reliable clamp that would work on my CNC table which has t tracks and a 3/4 inch spoil board. I had to purchase longer bolts with allen key heads to accommodate the thickness of the spoil board. My tracks are set up every twelve inches on a 48" table.They work flawlessly. I do production sign work and the clamping process has become part of the process. No more fighting to adjust clamps, or smacking into them with the carving bits! (not a pretty sight!) Their low profile, at least for my work, insures nothing is in the way when I run my jobs. No issues regardless of size of material. I use a block between the clamp and my workpiece which eliminates any marring of the finished product by the clamp bite. I keep my allen wrench in a tool slot with my bits in close proximity to the table. Have produced hundreds of signs, and have not had one slip yet regardless of size. The nice thing about these clamps is they bite down as well as in which can be used to force a slightly bowed or skewered piece into laying flat. For those who use CNC's and V carve you know how important that is. Best of all, thanks to the little allen key slot holder I built. I have never lost the allen key!As far as the finish and tolerance of the product goes, I purchased four at different times. All work perfectly. I have found the best way to use these is to snug up to block, tighten securely and turn the cam lever. Works every time.

First I needed to clean everything to get the black mess off. Then, I needed a grinding wheel to "resize" the track slide for one of the two clamps I bought (I'm using industry standard T-track). It was too wide to fit in the track. I also needed two 7/8" long replacement bolts because the 3/4" 1/4-20 that came with it didn't grab much of the track slide thread (that meant buying a 1" bolt and shortening it on the grinder). The metal that the clamps are made from is very hard, reminds me of the metal rasps are made from. Now the clamps work very well, and do a very good job. After all the fixes, I'm very happy with the clamps.

These clamps work OK for me NOW THAT I SPENT HOURS AND DOLLARS correcting several quality issues.1. Screws are too short to engage T-bar. A trip to the hardware for longer screws that the had to be ground to a shorter length.2. T-bar too wide to insert into T-slot. More grinding to let them engage the slot.3. Disassembly and reassembly of one clamp to correct the anvil being installed backward.4. More grinding to allow anvil to "rock" forward and backward.Had I not needed them immediately, they would have been returned to Amazon for refund.Very disappointed. Buyer shouldn't have to re-engineer a product that's supposed to work with industry standard T-slot platform.

I bought four of these to use for securing large pcs. of stock to the bed of my mill. I was looking for a low-profile clamp that would allow me to machine the entire surface of larger parts without interfering with the tool in the spindle. While they work well enough, often I'd have to use an Allen wrench in conjunction with the clamp lever as the bushing inside the clamp bottoms out on the mill table prohibiting you tightening the clamp completely. My guess is they were machined incorrectly at the factory. Overall fit and finish is good, but the clamps are a little small for what I'm doing. I'll be making my own clamps from now on.

The low profile of these clamps make them ideal for CNC work. Position it at the desired location and an Allen wrench will securely fasten it in place. When you turn the cam it simultaneously clamps the workpiece sideways AND downwards. Note these are designed for the Shop Fox T-Slot track; you may need to use a different bottom nut in another track.

I've now used these clamps for a few projects, and I've decided that I very much like them for the convenience they add to my workflow. However, their manufacturing tolerances are bad. I ordered four clamps. One of them had a center pivot that was too short, so if you tightened the clamp to the T-track, it clamped down on the cam, rendering it inoperative. I popped the screw and center part out, added a washer to add clearance, and the clamp works perfectly now. Also, the end of the jaw springs poke out below the base of the clamps, which is slightly annoying and made even more so by the extremely short screws.So, I replaced the screws with longer 1/4"-20 socket head cap screws, replaced the so-called T-track nuts with "real" ones from my stock of T-track nuts, and added washers as necessary to create clearances where poor manufacturing had not, and in spite of all that, I rather love these clamps. Basically, I highly recommend these clamps, but consider them "part sets" that require screws, nuts, and washers for assembly (those three not included).

The cam feature makes a tight grab. To avoid damage to my wood I use a steel bar to distribute the pressure. I use in conjunction with the spinney vise to adjust the distance and this makes easy to batch out several of the same board size and hold it secure. Just flip the lever to lock and flip back to release.

This clamp works for me, but I gave it three stars because it is clunky and requires an allen wrench to tighten it down. The cam clamp from Rockler is much more elegant and nicely made. In addition, the Rockler one can be tightened with out additional tools. Unfortunately the Rockler item will not fit the 1/4" track that I have in my shop. That being the case I would recommend this Fox Shop clamp to anyone who has 1/4 track.