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Aftermarket SMT
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marK in WA and Ryobi Fanatic Association State President ©
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Originally posted by I saw that!Do let us know how well they mate up with your original(?) B slides.
I'm still surprised it was your A slides instead of your B ones that broke up, since the A's are about double the thickness of the B's. It was my B slides that cracked up, which until now I thought would be the norm.Donate to my Tour de Cure
marK in WA and Ryobi Fanatic Association State President ©
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Originally posted by I saw that!Does "will be" indicate an assumption on your part?
I know how manu's love changing things ever so slightly between OEM and house re-badged products. Also, designs do get altered occasionally.
I haven't heard back from the Ryobi sources who were going to research everything there is to know about these (and rip block) slides, including design and material changes, if any, between production runs. I think they went and forgot about lil ole me after they confirmed the OEM slides are (or at least were) Delrin.Donate to my Tour de Cure
marK in WA and Ryobi Fanatic Association State President ©
Head servant of the forum
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You might think I haven't contributed much to the world, but a large number
of the warning labels on tools can be traced back to things I've done...Comment
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Originally posted by I saw that!Then there are these. Uber cheap.
If some fitting will be required for off-the-shelf components, fabrication doesn't seem too far off. Attached is an update to the OEM acetal A/B (#25/#28) bearing block dimensions, calling out (page #2) dimensions for a single unified bearling block. This should require a minimum of a tablesaw, drill press, and measuring caliper to fabricate. And here the only dimension requiring fuss is the 2.75mm (0.108") dept of the upper block lip which establishes the height of the miter table top (#1) relative to the miter table extrusion (#14). Once this has been accurately setup, all sides of the block perimeter are then kerfed allowing all four sides to be used as consumable wear surfaces.Attached FilesComment
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Originally posted by I saw that!Well, it was a question not an assertion. No offense meant.
What left me with the impression that there could be differences somewhere over the course of decades is the response by Ryobi to my queries.
The support sources left the issue of possible design alterations open, while there was no hesitation in stating matter-of-factly that the material used (at least for the originals) is Delrin. No ifs ands or buts. Delrin.
The fact that personnel who had been working for Ryobi for decades and allegedly had intimate knowledge of the BT3 design in particular needed to research the matter made the possibility of design modifications to the slides seem real to me.
It wouldn't be the only plastic component that was changed.
My old rip block slides are black. The new OEMs being offered on eBay are white. The pics are a bit blurry, but they don't appear 3D printed.
The Ryobi source couldn't comment on this w/o research, leading me to conclude there could be changes involved other than simply color.
The miter fence clamp knob went through several variations. Comparing the earliest knob to the later ones, it's pretty obvious they did this to enhance grip/torque.
The rip fence roller holder was beefed up, presumably due to a relatively high incidence of cracking.
Thus, I thought it possible they eventually beefed up the B slides if premature failure (i.e., cracking) was common. If they had done that, maybe they also changed B slide dimensions other than thickness (e.g., tabs) and dimensions on newer A slides to match.
If nothing ever changed with these slides and they all fit perfectly regardless of year or label, that's great. The inability of Ryobi to state same is curious.Donate to my Tour de Cure
marK in WA and Ryobi Fanatic Association State President ©
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Originally posted by I saw that!A miniature ball bearing could be used in the alternatively proposed sandwich instead of a spacer (third washer). If no stock ball bearings can be found that are the needed dimensions, then a simple sleeve bearing made up of 2 spacers and dry lube between them should work. That's assuming, of course, the stock material is available in close enough diameters to meet desired tolerances.Comment
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