Hi Ed, I just now discovered that I do not have the 88 tooth gear in the quadrant gear area of my M300. Apparently there are a total of 7 gears that in correct...
Hello, Â Where are you located. I have a M300B that I had to have three gears made for to get it going. Essential parts never seem to make the trip with the...
Hi Joe, I live in Houston, TX. Are you saying you have a source for these gears? Or do you have an "extra?" Yep you are right. I am playing catch up with this...
I had to have three gears made by a gear shop in Midlothian, Tx. I am in Blooming Grove, west of Corsicana, Tx. The gear shop is metro Sprocket and gear...
Tom, Matt at Quality Machine was able to supply new gears from current production (china) machines that fit my 1987 vintage machine. His mail is: Quality...
Tom, Matt at Quality Machine was able to supply new gears from current production (china) machines that fit my 1987 vintage machine. His mail is: Quality...
If getting a gear with the correct spline isn't possible, I think an alternative would be to turn up a different hub, not having a spline. A simpler, keyed...
OK, I just placed the order for 10 of the bellows for the feed engage lever on the M300. I will have to make a call to the UK to confirm payment. I believe...
Hi Jordan, Thank you for your input. My M300, in this gear cluster, all gears swap shafts to get the needed gear ratios. There are 3 shafts that have the same...
Tom, I am confused, something doesn't jive here. How is it that you are able to operate the lathe with the change gears missing? Under the end cover there...
That's interesting. My late model M300 has 44 steel, 44 steel, 96 phenolic and 88 phenolic gears (note, not 40 and 95). The 44 and 96 gears are fixed. Looks...
I see, not as simple to substitude with a simple keyed gear as I thought. The plastic gears I'd assumed to be only to keep noise levels low, but I guess could...
Hi Ed, Sometimes I think I have a hole in my head. I think that I am explaining things real well and then I find out that I am not understood. Oh well, such is...
To All, Does anyone know for certain what pressure angle these gears are cut at? It is difficult to tell, using those gear guages. 14.5 degree is what seems to...
Have you tried emailing the people at www.colchesterspares.com ? They break Colchester and Harrison lathes for parts and I believe they will ship worldwide....
Tom, There should not be any reason to have the 95 tooth gear on the secondary idler shaft and use the thread cutting charts that come on the lathe. I suspect...
Neil, I was thinking the same thing but forgot to mention it. But if Tom's chart should show the correct gears. Thinking about it, since yours has 44 and 96...
Ed, I probably should have added that my M300 has a metric (6mm) leadscrew. That might account for the slightly different gearing versus an English (4TPI)...
Tom I have used gear tooth profile gauges and they are pretty difficult to interpret. Tooth profile varies with diameter, pitch, and pressure angle and one...
Ed, On all charts on lathe, including one located inside side cover, have the 95 tooth gear as the back gear on the idler shaft and the 40 tooth is always on...
Lee, I just now did your method. Hmmm? You did say "roll" it through the clay. OK, I did that and got 20 degrees on the adendum end of tooth. Then I simply...
Tom You have to roll the gear through the clay. Lee ... From: "Tom Darragh" <tdarragh@...> To: <harrisonlathe@yahoogroups.com> Sent: Saturday, February...
The pressure angle has to be measured at the pitch circle diameter - measuring it near the tooth tip will give too large an angle. I checked a gear from my 600...
And, use a razor blade to neatly cut across the tooth flanks, so as to easily see the angle. Jordan ... You have to roll the gear through the clay. Lee...
Harrison 140 lathe with the 36 speed Norton box, The double sided Screwcutting information plate, couple of thumb screws keep it in place just under the 3...
I'm fixing up an old M300, there is an awful lot of play on the topslide so I was looking to try and replace this. Does anyone where I could get hold of one....
James, before you get to involved in replacing the cross slide, it is adjustable. What part is so loose? Ed ... [Non-text portions of this message have been...
... Hi Ed There's a lot of play on the hand wheel which you turn to move the top slide with- you can move it about 1/3rd of a turn before the cutting tool...
Hi james, The "Top Slide", I am assuming is the Compound you are talking about. The base of it is mounted with two bolds and will rotate 360 degrees. Let's...
