Honing 2 stroke cylinders

[Jbird988]

Hello, Over the last few years i have acquired a VN 944s and a Serv equip hand honing tank among some other things. I am honing with a AN-112 on a rugged air drill. was wondering if some of you have a preferred method to honing the chromoly bores that 2 strokes have as far as what grits and at what step in the process. Softer stones VS standard stones? Most rings I see are ductile, chrome and some phosphate. I have bored lots of cylinders and I never have more than .005 distortion with my bar, also I get a very nice smooth finish to the bores using a indexed cutter which I dont see any tool marks from. I usually bore to under.003 final size for reference. Thanks

[bentvalves]

2 strokes don't have chromoly bores, they have nikasil plated aluminum cylinders, or an iron liner pressed into an aluminum jug.

if you are working with nikasil, it is very different from an iron sleeve.

[Jbird988]

2 strokes don't have chromoly bores, they have nikasil plated aluminum cylinders, or an iron liner pressed into an aluminum jug.

if you are working with nikasil, it is very different from an iron sleeve.

Moly 2000 chrome-moly iron along with Moly 2000 iron are the most common iron sleeved material when working with new sleeves for a 2 stroke

[MotionMachine]

You can't do any material removal on nikasil unless you have a diamond hone. If you are simply re-ringing these cylinders, you need to get some aluminum oxide flex hones from BRM. These are made for nikasil and are different than the usual silicon carbide hones for cast iron.

[Jbird988]

Im only honing stock out of iron bores

[Therriaultper]

I use sunnen key way stones that are for two stroke cylinders . You can get them from Goodson or sunnen work realy good that is all I use !

[David Redszus]

In order to remove metal, the abrasive must be harder than the metal work piece.

Abrasive hardness is measured using the Knoop Scale.
In order of hardness;

Aluminum oxide....2000
Silicon carbide......2100
Boron carbide.......2800
Boron nitride........4000
Diamond.............7000

Nikasil can be honed using boron nitride (sunnen = Borazon) or diamond stones.
While diamond abrasives cut the fastest and last the longest, they do not produce a very good surface finish.

For metal removal from iron or steel, any of the above abrasives may be used. Some will take longer, others cut
faster but are more expensive. In production applications, operating costs are always considered.

[modok]

2 strokes don't have chromoly bores, they have nikasil plated aluminum cylinders, or an iron liner pressed into an aluminum jug.

if you are working with nikasil, it is very different from an iron sleeve.

Moly 2000 chrome-moly iron along with Moly 2000 iron are the most common iron sleeved material when working with new sleeves for a 2 stroke

to most of us "chrome moly" means hardened steel

I like to use AN keyway stones for two strokes.

[modok]

Definitely j63 for single stage finish.
I'd think a plateau finish should work better, but I did a LOT of them like that and people like it.

[Bill Chase]

Hello, Over the last few years i have acquired a VN 944s and a Serv equip hand honing tank among some other things. I am honing with a AN-112 on a rugged air drill. was wondering if some of you have a preferred method to honing the chromoly bores that 2 strokes have as far as what grits and at what step in the process. Softer stones VS standard stones? Most rings I see are ductile, chrome and some phosphate. I have bored lots of cylinders and I never have more than .005 distortion with my bar, also I get a very nice smooth finish to the bores using a indexed cutter which I dont see any tool marks from. I usually bore to under.003 final size for reference. Thanks

The guy that used to do all my boring work when I was racing ATV and snowmobile used an old sunnen rod hone for most small bore two strokes. Always did a great job. Seemed odd at the time but it worked!

[n2omike]

The guy that used to do all my boring work when I was racing ATV and snowmobile used an old sunnen rod hone for most small bore two strokes. Always did a great job. Seemed odd at the time but it worked!

SAME!

[Jbird988]

Hello, Over the last few years i have acquired a VN 944s and a Serv equip hand honing tank among some other things. I am honing with a AN-112 on a rugged air drill. was wondering if some of you have a preferred method to honing the chromoly bores that 2 strokes have as far as what grits and at what step in the process. Softer stones VS standard stones? Most rings I see are ductile, chrome and some phosphate. I have bored lots of cylinders and I never have more than .005 distortion with my bar, also I get a very nice smooth finish to the bores using a indexed cutter which I dont see any tool marks from. I usually bore to under.003 final size for reference. Thanks

The guy that used to do all my boring work when I was racing ATV and snowmobile used an old sunnen rod hone for most small bore two strokes. Always did a great job. Seemed odd at the time but it worked!

I have a lba666 but hard to do some of the mono blocks on it lol