God bless matty I’m battling the same cancer and it’s draining lol anything you upload is appreciated mate even if it’s a chin wag take care matty wish you a speedy recovery god bless mate
@@tattoos1988 hang in there, it’s bloody draining but you have to stay positive and motivated, it’s not easy at all, please keep me posted on how your getting on mate
The aluminium pushrod is made to be light; motorcycle engines and any performance engine tends to use lightweight components to reduce inertia sapping power from it's performance. Racing valve gear is one of the first targets for reducing mass (weight). The acceleration of the components can be critical as this has an effect on the cam profile which influences the time the valves are open, given the short time the valve has to open (and remain open for as long as possible) at high revs, it has to open very quickly. It's a complicated process (I have several books on nothing else!) but rest assured the push rods are made of aluminium for a reason. They were both probably originaly aluminium but perhaps somebody already replaced one? Another thought... Aluminum and stainless heat expand at different rates, It might be a good idea to check the clearance cold, then check it again with the engine hot, to make sure there is clearance with the engine hot. If clearance is too small valves will burn out.
Gday, the engine is in an old lawnmower and apparently they couldn’t buy replacement, they requested it not to be in aluminium, I should of mentioned this in the video, thanks for watching, cheers
Ah, that explains a lot! ...would still check the valve clearances hot. Is that a Colchester lathe? I have a student 1800 which I am just fitting a VFD and a DRO, it was new in 1973. My 4th Colchester in 50 odd years, keep up the good work.@@MattysWorkshop
Good video. Sorry you've got issues from the chemotherapy, I've had a degenerative nerve disease for 15 years before I had cancer and the chemotherapy left me with hand and neck tremors since. You were healthy before cancer it's possible the tremors will subside.
The small jobs are just as important as the big ones to whoever brought it to you. Nice work. Hopefully the shakes will pass. Only good thing with the shakes is you don't need to stir your coffee lol. It does make it aggravating while doing layout work.
Gday, some times the small jobs take a little longer to do as well, I’m hoping the shakes doing hang around to long, I keep shaking the sugar off the spoon and the coffee don’t taste right, thanks for watching mate, cheers
Hi Matty, not watched the video yet, looking forward to it. Just you have a typo in the video title "ROB" instead of roD. Cheers. Edit. Really nice little job again, I have no idea how you get such a pristine finish Matty. On something like that I'd end up with something that looked as if it had been knitted.
Actually, that was a really nice little challenge and so nicely done Matty, I can see why your mates have so much confidence in you, bravo mate!@@MattysWorkshop
I’m amazed you could turn that thin without deflection Matty, very instructive indeed. I was betting you would have to use a follow rest. Learn something new every day. 👍👍👍
@@MattysWorkshop I was betting tool pressure would have caused deflection, but I was dead wrong and you proved it, so I definitely learned something new, which is always welcome. 👍👍👍
Hello Matty. Nice job on the pushrod. It occurred to me that the deflection could be used to your advantage. A barrel shaped rod would be less likely to bend. That said, this one will work perfectly for the intended purpose. Great to see you out and doing a bit. As always, my very best wishes to you. Mart.
Good morning. Great to catch another video of your Shed Work. The scale difference between your work and Kurtis at CEE (my 2 favorite precision engineers) is amazing. Thanks, and stay strong
G'day Matty. Your skills have improved by leaps and bounds mate!!! You are doing great. Keep it going. Hope you got good news coming from the doctors. Cheers
That insert turned the OD beautifully Matty, lathe cutting pretty good on parallelism 👌. Never heard of a "Knob Jockey " before, love it. Brilliant job as always, take care, and thanks for sharing
@@MattysWorkshop No Matty , I 'm not suggesting you DID, but that you SHOULD have.🙂 I usually have a wooden dowel on the lathe as a surrogate finger , to apply a little extra force where necessary. I said off-camera because there's always some **** willing to criticise.
@@wktodd I know exactly what your meaning and your spot on “willing to criticise”, I’ve been chipped on a few things now that to me there’s no drama but to others it’s a major no no, even been chipped on what I was wearing and I should never operate a machine in them clothes, 🤣
If you wanted to reduce the weight/mass a bit more, you could have "undercut" the centre section of the rod, as it has the strength to remain straight. Leaving the ends at 8 mm for 15-20 mm then reduce the belly to 6 - 7 mm. As usual, good job!
Nicely done Matty. Making push rods from Aluminum tubing is fine as long as the strength is acceptable. The wear factor could be solved by hard anodising or similar process. I go through patches of the hand shaking, and the doctors want to test for Parkinson's. I put it down to the drugs they prescribe me, and the nerve damage I got. I love to sketch and paint watercolour, but these days I have to pick a day when the shaking isn't too bad, lol, and as you say, "it is what it is". Good to see you enjoying yourself again mate, keep safe and well, regards to you and family 👍
Gday, I’m surprised the original isn’t hard anodised, the shakes are good somedays and terrible the next but I’m hoping it’ll come good over time, the amount of drugs they put me on I’m surprised that’s all that’s shaking, thanks for watching mate, cheers
@@MattysWorkshop Yep been on morphine since 19th December 2003, and other controlled drugs, taking 11 pills a day, used to be 23. I sorted out which ones I'd take and stop the rest as taking so much medication caused me to have non-alcoholic liver cirrhosis. Stopped the excess pills and last year was told my liver is stable. The Pulmonary fibrosis will see me off anyway 😂. I make jokes about my terminal illness as often people don't know what to say, and walk on egg shells. I'm a big boy now and pretty thick skinned so I cracked jokes and people feel at ease then. My elder brother and I do joke sometimes a bit close to the bone but we've always been the same. 3:57 am in UK now not sleeping well but just read, listen to music, or the wife's snoring, I'll drop off soon, cya mate.
Gday Dale, I’m much better then I was, the end of last year was pretty rough, I’m hoping to have an update next week if all goes well, thanks for watching, cheers
I'm nowhere near as good as you on my lathe. Great job. If this were a high performance engine, the change in weight from aluminum to steel would probably force a change in the spring tension on the valve as well as cam lobe profile and hardness. My guess is the engine will die from other causes before cam/valve issues surface.
Hello Matty. You can try a good piece of HSS tool steel sharpened razor sharp with the smallest radius you can get on it. Much less tool pressure then carbide insert tool.
G'day Matty, nice to see you working on some proper stuff for a change lol Hope the shaky shit calms down mate, cracking job as always, you certainly saved the bacon for the owner Hope you're keeping well, and lots of the good stuff your way fella
Hey mate… Nice work. I seem to remember that ‘barrel shaped’ pushrods were all the go at one time. Probably tfr racing engine guys trying to market their way out of ‘deflection’ 🤣🤣🤣 Robert
Gday Robert, the engine this rod was for is off a ride on mower, I’m not sure it’s they use aluminium so there’s a weak point possibly, appreciate you watching mate, cheers
just did the exact same job last weekend,and about exacly the same metods - great minds think alike 😁 kurtis has a t-shirt whit "Fuck off,train" on it - Matty can have one saying "it is what it is" 🤣
Gday Danny, having the shakes takes a bit to get used to, somedays are worse then others but I’m hoping over time it’ll disappear, thanks for watching mate, cheers
Nice job Matty. They make them from ali to try to give a few more revs to the engine. Not sure its worth it unless its for a race bike. Stay well. ATB regards from the UK
Great job. . Those pushrods have to be very exact. . tolerances are very precise. . You did a fantastic job. Hopefully the slightly heavier weight won't bother the system. Do you have an update on your medical procedure? Hopefully it's all good.
Gday, this engine is on a ride on mower, I don’t think the extra weight of the pushrod will effect to much hopefully, at this stage I’m hoping to have an update next week if everything goes right, thanks for watching, cheers
Interesting. I’m about to dismantle my 19hp mower and I know it also has 1 steel and 1 aluminium push rod. I have also been wondering why they are done this way. Would it really be cheaper than making two identical steel rods? As you have now changed to stainless I wonder if what ever caused that wear will now wear out in future and be more difficult to repair. I guess you have done exactly what was asked of you. Came out very nice 🤠
Gday Davo, considering the exhaust side is steel and the wear marks are the same on both I don’t think it’ll be to much of a problem (I hope), thanks for watching mate, cheers
Interesting project. I wonder how the new parts will perform, since you don't have access to all of the specialized alloys the MFG might have used. Let us know and great work.
It probably will but for an old ride on lawnmower I don’t think they were to worried, they asked for it not to be aluminium again, thanks for watching mate, cheers
Another good outcome Matty. I was interested to see that you could ream such a short blind hole to size. My reamers typically have 20-30 mm of taper before reaching full diameter. Perhaps there is a special type of reamer, analogous to a bottoming tap, that I should look out for.. Cheers.
Gday Alan, the reamer I used for this is from a cheap import set that are parallel, very cheap but they have worked great for a few years now, thanks for watching, cheers
That is odd that they make them out of aluminium. The wear is quite bad. May be it is a ploy to make you buy their spare parts? And, I have bumped the dial a few times as well. They were not in the middle of the work though. I got in the habit of zeroing the DRO when close to finishing cuts so I know where I am.
Gday John, it’s quite possible that’s why they use aluminium push rods, I couldn’t believe I bumped the handle, it only just cleaned up luckily, appreciate you watching mate, cheers
Hi Matty, thanks for the video. Just a quick question, your lathe, what is it? I'm in the market for something around that size and looking for a recommendation. Hope you're well on the path to being sorted out! All the best to you and your good lady! Mark Apologies if you've already done a tour of your workshop and I've missed it.
Gday Mark, the lathe is a Hare and Forbes AL960b, it’s a Taiwanese lathe and so far I really can’t complain at all, I believe it’s a good value for money machine, thanks for watching, cheers
@@MattysWorkshop It is, for cost reasons usually but also because it's light. They do flex, so generally frowned upon in any high performance rig. They should be plenty fine for mower though. Glad you're keeping busy, hoping things are improving on the health front. Be well.
The DNMG type is generally a roughing/heavy stock removal type of tip.They are mounted in a tool holder with negative top rake geometry and most often secured to the tool shank with either a top clamp or a peg through the hole which pulls the insert back tight into the tool shank. The DCMT type has the same diamond profile but they have a generally more positive cutting geometry which is more suited to semi finishing or finishing cuts. The DCMT type inserts are secured to the tool shank with a single tapered head screw which locates the tip directly into the top face recess of the tool shank. Also,the DNMG insert can be turned over and therefore has 4 fresh cutting edges whereas the DCMT type has cutting edges on one side only and therefore has only 2 cutting faces/edges. The same negative top geometry also applies to all the other inserts ending with a *NMG code. CNMG,SNMG,WNMG all have negative top rake geometry for heavy stock removal.
Gday, the ones I use are DCMT, I think there a brilliant tool and you can get a great finish with these, @howardosborne8647 thanks for explaining this mate, cheers
Out of interest … you can buy 8mm stainless rod. But I’ve never measured to see how super accurate it is. Was none available to you or isn’t it accurate enough ? Regardless, enjoyed the journey.
Gday, there’s nowhere around here to buy rod like this unless you get it ordered in and then you’d pay through the nose for it, thanks for watching mate, cheers
@@MattysWorkshop- yep it’s a bugger living in the “bush”. Until recently my brother lived at Nethercote and was always complaining about how hard it was to get stuff.
