silver pigeon69 Posted February 25, 2019 Report Share Posted February 25, 2019 Hi I have one of the above and need to change the tool holder. I have the new part but can’t work out how the old one comes off? I think it pulls off, but if so it must be a very tight fit to stop it moving when the tool is working. I have attached some photos. Any advice would be appreciated. Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted February 25, 2019 Author Report Share Posted February 25, 2019 Quote Link to comment Share on other sites More sharing options...
andrewluke Posted February 25, 2019 Report Share Posted February 25, 2019 you need something like this Quote Link to comment Share on other sites More sharing options...
amateur Posted February 25, 2019 Report Share Posted February 25, 2019 …… and before you put the new one on the shaft, check if it slips on easily. If it does, use some bearing lock to hold it. If it is too tight to slip on, pop it in the oven at 250 degrees for half an hour to expand it first. Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted February 25, 2019 Author Report Share Posted February 25, 2019 4 hours ago, andrewluke said: you need something like this Thank you. 5 minutes ago, amateur said: …… and before you put the new one on the shaft, check if it slips on easily. If it does, use some bearing lock to hold it. If it is too tight to slip on, pop it in the oven at 250 degrees for half an hour to expand it first. and thank you. Quote Link to comment Share on other sites More sharing options...
rovercoupe Posted February 25, 2019 Report Share Posted February 25, 2019 If it's Bosch it will be a right pain to do but I would go with a bit of heat on the ring and it should come off, you may have to heat the new one to get it on too. Quote Link to comment Share on other sites More sharing options...
Loki Posted February 25, 2019 Report Share Posted February 25, 2019 Hi Your local motor garage may have a 'mini-ductor' type thingy that uses a flexible wire/coil and electro-magnetic induction to heat up seized components and hence expand to take off. I had two with no use for them so gave them to a friend - shame you are not nearer as he will still have them......... L Quote Link to comment Share on other sites More sharing options...
Remimax Posted February 25, 2019 Report Share Posted February 25, 2019 (edited) i would cut a slot in the old one with a 1mm cutting disc most of the way into the ring and give it a tap with a sharp cold chisel on the edge. heat up new and drop it on shrink fit. you would be better off taking it apart to do the job really. they are a pain just put a new motor in a battery milwakee mulitool was a fiddley strip down. Edited February 25, 2019 by Remimax Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted February 25, 2019 Author Report Share Posted February 25, 2019 2 hours ago, rovercoupe said: If it's Bosch it will be a right pain to do but I would go with a bit of heat on the ring and it should come off, you may have to heat the new one to get it on too. Thank you. Should i heat it (carefully) and then use the gear/bearing puller? 1 hour ago, Loki said: Hi Your local motor garage may have a 'mini-ductor' type thingy that uses a flexible wire/coil and electro-magnetic induction to heat up seized components and hence expand to take off. I had two with no use for them so gave them to a friend - shame you are not nearer as he will still have them......... L Thanks. I don't know a garage that would do "mates rates" , that would have one, and i can get a new (Makita, which i like) for £90 ish, so not worth paying a garage £40+. The bosch is 7 yrs old and has done some hard work, so i'm not expecting it to last much longer without a major breakdown! 11 minutes ago, Remimax said: i would cut a slot in the old one with a 1mm cutting disc most of the way into the ring and give it a tap with a sharp cold chisel on the edge. as has been said heat the new one up and put it on ,watch the heat transfer doesn't fry it so a controlled cool off might be required Thanks for the reply. I did think of this but the body is quite close to the tool holder and i didn't think i could cut deep enough, without cutting the body or shaft, to be able to crack the remaining metal. I think there would be about 5mm of depth left at the back and 3 at the front? I will hold a grinding disc against it tomorrow and take a better look. How would you suggest a controlled cool off? wet rag around the base of the shaft or a dip? Quote Link to comment Share on other sites More sharing options...
Remimax Posted February 25, 2019 Report Share Posted February 25, 2019 cut it at 45 degrees then your not going to hit the body ,wet rag round the base of the shaft should protect the bearings. Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted February 25, 2019 Author Report Share Posted February 25, 2019 8 minutes ago, Remimax said: cut it at 45 degrees then your not going to hit the body ,wet rag round the base of the shaft should protect the bearings. Thanks. If i get a minute tomorrow, i will try that!👍 Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted February 26, 2019 Author Report Share Posted February 26, 2019 Sorted it! thank you to everyone who replied Quote Link to comment Share on other sites More sharing options...
amateur Posted February 26, 2019 Report Share Posted February 26, 2019 Result! Quote Link to comment Share on other sites More sharing options...
Remimax Posted February 27, 2019 Report Share Posted February 27, 2019 spot on 👍 Quote Link to comment Share on other sites More sharing options...
mickyh Posted March 1, 2019 Report Share Posted March 1, 2019 Great job but do I see Temper in the metal I hope it hasn't gone too brittle.Or too soft It looks like you managed to get every colour of Temper ! Quote Link to comment Share on other sites More sharing options...
silver pigeon69 Posted June 18, 2019 Author Report Share Posted June 18, 2019 On 01/03/2019 at 10:44, mickyh said: Great job but do I see Temper in the metal I hope it hasn't gone too brittle.Or too soft It looks like you managed to get every colour of Temper ! Sorry for the late reply! It seems to be ok, but only time will tell. Quote Link to comment Share on other sites More sharing options...
Kevstar Posted January 11, 2021 Report Share Posted January 11, 2021 My gop 250 has stopped reciprocating. I have undone the front screws and taken off the rubber protector, but can't get the end off. Any advice on how to proceed and solve the whole problem would be appreciated. Thanks Quote Link to comment Share on other sites More sharing options...
Dazn Posted April 5, 2021 Report Share Posted April 5, 2021 I would like to know how to remove gearbox from motor on gop250 so I can repair it...any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
Dchilt Posted June 26, 2022 Report Share Posted June 26, 2022 On 25/02/2019 at 04:33, andrewluke said: you need something like this What brand and model is this? Quote Link to comment Share on other sites More sharing options...
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