The Sunnen hone was one of my favorite machines in the shop. Spent many hours resizing rods and pitting pin bushings and pistons. Was pleased to see that you were alternating the direction of the pistons to keep the bore equal in size and prevent the hone from getting a taper. Thanks for sharing.
Nice work Brian. You were lucky to get the .003 oversized pins. I'm always a fan of honing. To get that perfect fit. Nice cross hatch pattern holds oil. Thanks for sharing. Have a good evening. 👍
@@daleolson3506 I flipped the piston around most every pass but my editing probably cut a bunch of that out as I mainly tried to have action shots more than me fiddling. I will have to look at how the support rod could have held it better. Thanks for the tip.
I was one of a few guys at my old job that were shown how to use the Sunnen hone we had. Only got used for one job. To hone a small (just over .500 if I recall) deep, through bore in a stainless valve body for the aerospace industry. And had to hold a 16 micro inch finish or better. The honing work got outsourced.
The stones operate on a wedge. You control the load on the wedge with the dial on the machine. The dial indicator somewhat gives an indication of the bore size bye measuring the wedge position. The wedge is fed in with your foot and retracted by a spring and the pressure applied is adjustable. There is a lot more to one of these machines than meets the eye.
👍👍 don't know much about those,but i just read ,not that anyone cares,that is a bore of 5.5" and a stroke of 6.75"... bout the same as a C16 Cat i think.. what's the rod length there??.. the rod ratio is a figure that has intrigued me for some time...on 6 cyl diesel's anyway...but, thanks for sharing with us feller 👍👍👊
Seems like that oil line closest to you needs pointed over more so that it is oiling the hone better. It seems like it is just squirting on the end of the mandrel where it's not being much use.
The onn ten thousandth reading Sunnen gauge , is half the machine , maybe more ,,, ! ,,, Also , if you wanna make 50 more ponnies get modern 3 ring pistons and rings ,,, ! ,,, of course they might raise more hell if you burn one down the side ,,, lol ...
I doubt I could double the hp of the engine with a ring change. LOL Also friction probably pretty minimal at less than 1000rpm. Sure would be cooll though!
@@rolandtamaccio3285 I looked it up I was being generous the dyno for one of these engines says it makes 25hp at 975rpm. No way rings will free up 50hp in that application.
@@rowlandcrew dial bore gauge measures it at .0005-.001 over pin diameter. New spec is not given the manual just says replace when clearance exceeds .003”
Your mandrel is too short. When honing a tandem bore the stone length has to be at least twice the center to center length of the bores. In your case the two stone P28 mandrel you are using has a stone length of 6 9/16". That means the center to center length can be no more than 3 9/32". A three stone mandrel is what is needed for that job
The Sunnen hone was one of my favorite machines in the shop. Spent many hours resizing rods and pitting pin bushings and pistons. Was pleased to see that you were alternating the direction of the pistons to keep the bore equal in size and prevent the hone from getting a taper. Thanks for sharing.
Thanks for stopping by and hope all is well in your shop.
Nice work Brian.
You were lucky to get the .003 oversized pins.
I'm always a fan of honing.
To get that perfect fit.
Nice cross hatch pattern holds oil.
Thanks for sharing.
Have a good evening. 👍
Right on
Nice job Thanks for sharing Brian
Great job keep old iron moving. Thanks for sharing Brian.
That's a nice addition to the shop.
Turn the piston around every time. Stroke further. Move the stiff arm so the piston rests on it without side force.
@@daleolson3506 I flipped the piston around most every pass but my editing probably cut a bunch of that out as I mainly tried to have action shots more than me fiddling. I will have to look at how the support rod could have held it better. Thanks for the tip.
Nice job Brian. Ive never seen a Sunnen in operation.
Thanks!!
Very good job Brian..thanks for your time
Dear Brian
Great video my friend
Kimber
@@kimber1958 Thanks Kimber
Always alternate stroking direction (swap object end for end ) to equalize bore .........
I was one of a few guys at my old job that were shown how to use the Sunnen hone we had. Only got used for one job. To hone a small (just over .500 if I recall) deep, through bore in a stainless valve body for the aerospace industry. And had to hold a 16 micro inch finish or better. The honing work got outsourced.
Thanks for sharing 🇨🇦
Thank you for another Great video. Cheers
Nice work.
Thank you Brian!
Handy machine, do you expand the stones like on a fixed stone bore finishing hone?
The stones operate on a wedge. You control the load on the wedge with the dial on the machine. The dial indicator somewhat gives an indication of the bore size bye measuring the wedge position. The wedge is fed in with your foot and retracted by a spring and the pressure applied is adjustable. There is a lot more to one of these machines than meets the eye.
Very neat! Does the arbor expand or just the spindle oscillating that does the cutting? Very cool, thanks.
The mandrel has a moving wedge inside that moves the stone or stones in this case out against the bore you are honing.
thanks for the video
👍👍 don't know much about those,but i just read ,not that anyone cares,that is a bore of 5.5" and a stroke of 6.75"... bout the same as a C16 Cat i think.. what's the rod length there??.. the rod ratio is a figure that has intrigued me for some time...on 6 cyl diesel's anyway...but, thanks for sharing with us feller 👍👍👊
@@elroyelblander6277 I didn’t measure it’s probably about a 12” rod
I think it's 5.5 bore and 6.5 stroke. 310 cubic inch. John deere D was 501 cubic inch 2 cylinder. I don't remember the bore and stroke.
@@mikebougher3731 👍👍👊
Crazy antique tractor pullers are getting them to over 700 cubic inches.
Heard of one at 800.
We’ve got one of those same sized sunnen’s at the shop. I’ve only used it a few times in since I started in 2017.
I could almost smell of the cutting oil :)
Looks good Brian. Did also get the AG300 gage and the cap and rod grinder?
@@Randysshop nope. They were not with this unit.
Pretty cool!😎
How does that dial that you set for cut adjustment, enlarge the mandrel? How is it connected the the machine?
Seems like that oil line closest to you needs pointed over more so that it is oiling the hone better. It seems like it is just squirting on the end of the mandrel where it's not being much use.
Good bit of kit Brian, did you reverse the piston when honing like reversing a level to half any error.
Yes I kept swapping ends. The video is mainly of action shots so a lot of that got edited out.
Good
😐🇬🇧
👍🏻
!!!
The onn ten thousandth reading Sunnen gauge , is half the machine , maybe more ,,, ! ,,, Also , if you wanna make 50 more ponnies get modern 3 ring pistons and rings ,,, ! ,,, of course they might raise more hell if you burn one down the side ,,, lol ...
,,, just make all the new pistons and pins the same weight , don't re balance if you already did it ,,, !
I doubt I could double the hp of the engine with a ring change. LOL Also friction probably pretty minimal at less than 1000rpm. Sure would be cooll though!
@@bcbloc02,,, I'm only talking 50 horse , is this a single or an in-line six ,,, ?
@@rolandtamaccio3285 I looked it up I was being generous the dyno for one of these engines says it makes 25hp at 975rpm. No way rings will free up 50hp in that application.
@@bcbloc02 ,,, I thought it had 300 stock ,,, !
what does "feels excellent and nice and free" translate into clearance and what is supposed to be the spec?
@@rowlandcrew dial bore gauge measures it at .0005-.001 over pin diameter. New spec is not given the manual just says replace when clearance exceeds .003”
Your mandrel is too short. When honing a tandem bore the stone length has to be at least twice the center to center length of the bores. In your case the two stone P28 mandrel you are using has a stone length of 6 9/16". That means the center to center length can be no more than 3 9/32". A three stone mandrel is what is needed for that job
That would probably be ideal for equalizing stone and mandrel wear but this worked ok as it measured out fine.
That's what she said.
Hey brandon it isn’t often you see machining without holding the work piece! In some rigid way outstanding learning all the time 😵💫💯🫵🏻🇬🇧