Invicta/Delta DJ-15 Dust Collection Question

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Forum topic by deejay34 posted 03-07-2018 07:12 PM 1020 views 0 times favorited 0 replies Add to Favorites Watch
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03-07-2018 07:12 PM

Topic tags/keywords: dj-15 jointer dust collection chip deflector chipbreaker

I’m in the process of restoring (more like refurbishing) an Invicta/Delta DJ-15 6-inch jointer, and I’m at the point where everything has been cleaned, primed, painted, and is ready for reassembly. As I’ve progressed, I’ve been doing some research on possible upgrades that might prove beneficial based on others’ experiences. Some of those upgrades include swapping out the original v-belt for a link belt, upgrading the pot metal motor pulley for a heavier balanced cast iron pulley, changing the cutterhead bearings, and making some modifications to the dust collection already built into the machine.

Regarding dust collection, there seems to be two common complaints and possible avenues for recourse in order to upgrade the dust collection of this specific machine:

1. The dust chute built into the base cabinet is only 3-sided (i.e. it is not fully enclosed). Based on some research, it sounds like that can decrease suction from an external dust collector, potentially increasing the amount of dust that collects on the tables during use. A couple folks have commented on this, and I found a very useful remedy as detailed here. Note that this specific blog details modifications to the larger 8-inch DJ-20, but the general design of the base (and jointer) is the same for the DJ-15, just on a larger scale. In short, by adding a simple “top” to the dust chute (with plywood screwed into the existing dust chute, aluminum flashing riveted into the existing dust chute, etc), dust collection seems to be greatly improved. I have chosen the route of cutting/bending a piece of aluminum flashing, riveting it to the existing dust chute, and sealing up the seams with caulk. I will post pictures in an update to my existing restoration blog.

2. The machine can often times become clogged with shavings below the cutterhead. Some folks have attributed this, at least in part, to the fact that the perforated chipbreaker may be installed inappropriately (or backwards). Given that I did not purchase this machine new, I have no way of knowing for certain whether or not the previous owner modified the machine in any way. However, I have read that the chipbreaker was often observed to have been installed improperly (or designed incorrectly) by the manufacturer. One such instance where this is discussed that I have read to-date can be found here. Note that Halfday refers to the part as the “perforated chip deflector”, but based on the parts schematic for the DJ-15, I think he’s referring to the chipbreaker, as the chip deflector is solid sheet steel and the chipbreaker is perforated. Below I’ve included an image that highlights the chip deflector (Ref. ID 55) and chipbreaker (Ref. ID 95), as illustrated in the DJ-15 Parts List.

As purchased, my machine had both the chip deflector and chipbreaker installed per the above exploded assembly drawing. However, the first thing I did when I got the machine home was pull a couple of Home Depot bucket’s worth of sawdust/chips/shavings out of the dust chute and from beneath the cutterhead. Based on the exploded assembly view above, one can envision how the available space for chips/shavings to find their way into and down the dust chute in the base becomes pinched, for lack of a better term, due to the chip deflector and chipbreaker being oriented toward one another. That appears to have been the case with my machine, assuming the previous owner had a sufficient dust collection system/machine connected to the machine during use. One suggestion I have read elsewhere is to reach up into the base cabinet dust chute (or unbolt the jointer from the base cabinet and flip it over for easier access) and bend the chipbreaker so that it is oriented correctly. I’m not sure I like this idea, as simply mounting it 180-degrees from the orientation shown above should do the same thing…I think?

So, my question is, for those out there that have a DJ-15 or DJ-20, how are these components oriented in your machines? Are they installed per the above exploded assembly drawing, or do they differ from that?

Any input/suggestions/photos that folks would be willing to share would be greatly appreciated. Thank you!

-- DJ, "It takes a leap of faith to get things going, It takes a leap of faith you gotta show some guts..." - B. Springsteen

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