Honing stick selection
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Re: Honing stick selection
: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: k_g_vinod ® 09/24/2006, 04:40:11 Author Profile eMail author Edit

Dear sir, the surface finish requiremnt can be achieved by D76/ D91 stick. for finish honing, i presume that you are removing around 10 microns in finish honing. around 50 concentration honing stick wold work well. for the rough honing you may use D101 or D126 grit with 64 concentration. you may contact XXXXXXX to give you the honing sticks. The bond used in this is Z60 R, which is a good bond for cylinder bores. with regards to your quary as to why the sticks tend to load, this happens because the bond used is not fine tuned. many times when the supplier of honing sticks is pushed to give sticks which give good life, he tends to make the stick hard, by this the grit which becomes bald after usage is not expelled and tend to stay on teh honing stick, by this new gits do not come so quickly for the inside, you may request your stick manufacturer to give sticks that are self dressing. it is possible, but very difficult to establish. regards Vinod.K.G Modified by Administrator at Sun, Sep 24, 2006, 09:04:32

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Re: Honing stick selection
: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: shhard ® 02/20/2006, 10:09:34 Author Profile eMail author Edit

Very interesting for your discussion. Below is my comments about cylinder honing. Per the machine, Gerhing honing machine is better for cylinder honing, many India Group use Gerhing machine as I know such as Honda. Per the honing stone, there are diamond,CBN and conventional honing stone for your choice. Per my idea, for rough honing, use diamond and fine use conventional or CBN, which can guarantee the roughness and netwave. Per different supplier's stone, the cycle time must be different, it is difficult to say, need some adjustment from stone supplier and the user. Joe

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Re: Honing stick selection
: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: randykimball ® 01/25/2006, 00:06:08 Author Profile eMail author Edit

I've racked my brain and can't for the live of me remember the name of the hone machine we used so many hours. I'm hoping it will come to me as I type this. Of more improtance is the fact that the machine company aso provided the "stones" to go on the mandrels. Their catalog had extensive information of selection of stones and grits, along with an outstanding trouble shooting section that answered your question. ah.. it just came to me although I may mis-spell it.. "Sunnen".. I would go on line and look for that machine's information.. I think you will find what you need. I'd start by looking under Sunnen Hone. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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Re: Honing stick selection
: Re: Honing stick selection -- randykimball	Post Reply	Top of thread	Forum

Posted by: shreeraj ® 01/30/2006, 08:10:50 Author Profile eMail author Edit

fine, i visited sunnen website...it has got the best information other than any other manufacturer...but the problem is that the machine that my industry uses has DIATO stones on it...it has got a problem of cycle time variation.... ok wait...can u help me with this designation of a honing stone...what do the numbers mean? DI - D181 - AL80 - I75 i know about this type of designation: D91 55 112 50 and one more important thing.... WHAT IS STONE GLAZING....?????? is it related to the bond that is used to bind the grits???? I need some solid information man...plz help me... thank you

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Re: Honing stick selection
: Re: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: randykimball ® 02/03/2006, 23:53:31 Author Profile eMail author Edit

Hi, Tiger has addressed the glazing problem quite well. As far as the numbers for hone stone choices; I would ask your provider to recommend a stone that meets the well explained match at the Sunnen website. If that fails, I'd call Sunnen, they may offer a stone to fit that isn't on the site. /←randy→/ The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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Re: Honing stick selection
: Re: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: WhiteTiger ® 02/02/2006, 22:31:49 Author Profile eMail author Edit

Stone glazing is when the working face of the stone becomes packed with swarf, degraded bond material, and cast off abrasive grains. This material packs into the open pores of the abrasive stick and prevents the remaining abrasive grains from being able to penetrate and cut into the workpiece. Glazing is always a sign of improper use, which may consist of over dwelling the hone in the bore, attempting to remove too much material with a fine grain stone, or unlubricated cutting. Often the problem is a combination of the three. Ample flood coolant/lubricant, roughing large material amounts with coarse, open bond stones, and properly calculating cutting times and volumes for bore size and abrasive/bond combinations will eliminate all glazing while speeding production and improving quality. Tiger

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Re: Honing stick selection
: Re: Honing stick selection -- WhiteTiger	Post Reply	Top of thread	Forum

Posted by: shreeraj ® 02/09/2006, 08:10:31 Author Profile eMail author Edit

Thanx tiger, Can you further elaborate on the open and closed structures of bonds? what does one mean by open bond? for me it sounds like it would have more voids for more burr to get into :p sorry.....please put some more light into my dark head....

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Re: Honing stick selection
: Re: Honing stick selection -- shreeraj	Post Reply	Top of thread	Forum

Posted by: WhiteTiger ® 02/10/2006, 19:33:46 Author Profile eMail author Edit

I'd suggest a copy of machinery's handbook. They have a very nice and complete intro to grinding considerations with helpful illustrations.

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