Dznts213 Posted March 8, 2023 Report Share Posted March 8, 2023 Does anyone know a proper replacement? Quote Link to comment Share on other sites More sharing options...
Hulk Posted March 9, 2023 Report Share Posted March 9, 2023 Hi Dz, Welcome to the forum! If you're able to remove the switch, taking it to your local hardware shop to match up a replacement might be an option? I'm seeing Krueger carries a replacement, does the image match?Shimpo RK-2 Parts – FWD/REV Switch Knob (RK Common) – Krueger Pottery Supply Perhaps someone familiar with classic RK2 wheels will chime in here... Quote Link to comment Share on other sites More sharing options...
neilestrick Posted March 9, 2023 Report Share Posted March 9, 2023 The switch is probably not specific to the wheel, so take it off and do a google search for the part number on it. Quote Link to comment Share on other sites More sharing options...
PeterH Posted March 10, 2023 Report Share Posted March 10, 2023 (edited) 17 hours ago, Hulk said: I'm seeing Krueger carries a replacement, does the image match?Shimpo RK-2 Parts – FWD/REV Switch Knob (RK Common) – Krueger Pottery Supply Sadly that looks like the knob, the switch appears to be sold outhttps://kruegerpottery.com/collections/rk-2-parts/products/tanac006232-rk2 It's also discontinued here https://www2.ceramics.nidec-shimpo.com/parts-list/ I found no immediate hits for the part-no SRH623-2 Wiring instructions here https://www2.ceramics.nidec-shimpo.com/wp-content/uploads/2019/06/RK-2-WIRING-Troubleshooting-Manual.pdf I would guess that the switch gives straight-through, crossed and no connections, although I've no idea which pin is which (or what this type of switch is called). Maybe you could find an "equivalent" switch that would physically fit? A UK search for "changeover switch" gives some ideas. A search for "shrimpo crossover switch" gives several hits, includinghttps://www.theceramicshop.com/product/27976/fwd-rev-switch-vl-whisper/ This is a replacement forward and reverse switch for the Shimpo VL Whisper and RK Whisper pottery wheels. This item is the switch only, but for the switch assembly click here.Unsure if this is equivalent (or even 3-way) let alone a direct replacement. Good hunting! Edited March 10, 2023 by PeterH Hulk 1 Quote Link to comment Share on other sites More sharing options...
Dznts213 Posted March 10, 2023 Author Report Share Posted March 10, 2023 22 hours ago, Hulk said: Hi Dz, Welcome to the forum! If you're able to remove the switch, taking it to your local hardware shop to match up a replacement might be an option? I'm seeing Krueger carries a replacement, does the image match?Shimpo RK-2 Parts – FWD/REV Switch Knob (RK Common) – Krueger Pottery Supply Perhaps someone familiar with classic RK2 wheels will chime in here... Thats only for the knob sadly Quote Link to comment Share on other sites More sharing options...
Dznts213 Posted March 10, 2023 Author Report Share Posted March 10, 2023 19 hours ago, neilestrick said: The switch is probably not specific to the wheel, so take it off and do a google search for the part number on it. I did take it out but there is no part number on it, all ratings were on a sticker that unfortunately was mostly gone Quote Link to comment Share on other sites More sharing options...
Dick White Posted March 10, 2023 Report Share Posted March 10, 2023 (edited) NM Edited March 10, 2023 by Dick White delete Quote Link to comment Share on other sites More sharing options...
Hulk Posted March 10, 2023 Report Share Posted March 10, 2023 Shimpo wiring diagram indicates shr623-2 ...ah! Same one Peter found (above). I'm finding that part discontinued (see also TANAC006232). Perhaps figuring out what a switch actually does so a suitable replacement can be found is the only option. Quote Link to comment Share on other sites More sharing options...
Dick White Posted March 11, 2023 Report Share Posted March 11, 2023 ok, popping back in now with a clearer "picture" in my head. I believe the early RK Shimpos used a single speed reversible AC motor, with the variable speed of the wheel head achieved through moving the conical rubber head on the motor shaft back and forth across the rubber edge of a disk on the lower portion of the wheel head shaft. The newer Whisper models use an electronically controlled DC motor. The "crossover" switch from The Ceramic Shop noted in PeterH's comment is for the Whisper model, and so would not be a replacement for the switch on an original RK model. However, looking at the last page of the wiring diagram also noted in PeterH's comment, there appear to be three different switches that might have been used - the SRH632-2 already discussed, an AK-AB-33P4, and a common DPST toggle switch. The first two switch types appear to be some sort of 3-position rotary switch that internally swaps the leads to the motor to reverse it, depending on which direction the switch is turned. The toggle switch is a plain on-off switch, for which reversing the motor direction involves going under the machine to reverse a plug in the line from the toggle switch to the motor. It would appear from the research already done, the 632 rotary switch is obsolete, no longer available anywhere. A quick Giggle of the AK-AB switch also comes up blank. But, if you are facile with wiring, the common toggle switch could be a way out, albeit the motor would no longer be reversible at the switch. But maybe for your purposes, you only run it in one direction so reversing isn't important? Quote Link to comment Share on other sites More sharing options...
Bill Kielb Posted March 11, 2023 Report Share Posted March 11, 2023 (edited) I agree with Dicks observation. If none of the rotary can be found then I would follow the S-21 toggle model using a double pole single throw on off switch and probably add a double pole double throw reversing switch for convenience. Only thing would be break before make operation so always power down, then reverse and power back up. Pretty easy to sketch this if you are interested. Edited March 11, 2023 by Bill Kielb Quote Link to comment Share on other sites More sharing options...
Mark C. Posted March 11, 2023 Report Share Posted March 11, 2023 (edited) Shimpo USA is still in business mybe a old fashion phone call is in order? Edited March 4 by Mark C. neilestrick 1 Quote Link to comment Share on other sites More sharing options...
jbergler Posted October 9, 2023 Report Share Posted October 9, 2023 (edited) On 3/11/2023 at 10:07 AM, Hulk said: Perhaps figuring out what a switch actually does so a suitable replacement can be found is the only option. I found a datasheet for the switch here: http://www.hyungho.co.kr/?z=bbs.f_rotary&zz=view&bseq=135&cseq=0&pn=1&stype=&sstr=&soption=&cate=127 SRH.pdf Edited October 9, 2023 by jbergler neilestrick and Hulk 2 Quote Link to comment Share on other sites More sharing options...
Dznts Posted March 4 Report Share Posted March 4 A year later but thought Id let everyone know how I fixed the issue in case anyone else ha the same problem. I took apart the switch and saw that the contacts were all pitted, i cleaned them up with a wire wheel on my dremel and tried it again. It worked. while I had the wheel on its side I noticed the wiring was starting to come apart( its a wheel from ‘71) so i replaced all wires since i already had the motor taken apart to clean and lubricate it. The rewiring has it running like a champ but I dont suggest you do it unless you know what youre doing. i love this wheel, it may be loud but it was made in an era were things were made to last, it will outlive me and im only in my 30s lol Hulk 1 Quote Link to comment Share on other sites More sharing options...
Hulk Posted March 4 Report Share Posted March 4 (edited) Thanks for the update Dznts! Edited March 4 by Hulk spellin! Quote Link to comment Share on other sites More sharing options...
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