[TowerTalk] Can type 31 cores be cut in half ?

[Kevin]

If I was going to do it I'd go rent a tub saw that flooring techs use to 
cut ceramic and stone tile of all sorts.

Slow turning diamond impregnated blade soaked with water pumped on the 
blade during the cut.

If it'll cut granite smooth as a baby's butt, and it does, it'll cut 
ferrite.


On 7/5/2016 8:58 AM, Grant Saviers wrote:
> Yes it is possible with a diamond saw in a surface grinder. However, 
> it is very messy and and the dust/slurry is very abrasive so the 
> grinder owner may say "no way".   We machined a lot of ferrite many 
> years ago for recording heads and pretty quickly the grinders were 
> trashed.
>
> You need very flat and smooth mating surfaces (see a big clamp on) as 
> this mating changes the magnetic properties of the core by inserting 
> an air gap.  Obvious it can be made to work since #31 clamp ons are 
> very effective if kept tightly closed.  A tungsten carbide blade will 
> cut ferrite in your bandsaw but I think the cut will be so rough as to 
> be useless. A diamond blade in a cut off saw may work if it last long 
> enough without water cooling.
>
> I think you need a bigger NEMA enclosure as any of these techniques 
> will cost a lot more with probably poor results.
>
> Grant KZ1W
>
> On 7/5/2016 6:05 AM, Jim Thomson wrote:
>> I have a one off application where I  want to get  1-2  additional 
>> 2.4 inch OD cores
>> onto coax,  but dont want to take the existing CMC assy all apart.  
>> The big clamp
>> on is aprx  1.5 inches long..and is too long for this application.   
>> It’s a tight squeeze inside the
>> nema box, and  coax is already  silver soldered at both ends  to both 
>> connectors.  Dual silver
>> braids have been separated at each end of the  RG-393 coax, and 
>> bonded to 7-16 Dins.
>>
>> Can a  type  31  2.4 inch OD core be cut clean in half....like in a 
>> bandsaw ?   I have a
>> vertical bandsaw with a metal cutting blade in... with 3 x speeds,  
>> 80-120-200  feet per
>> minute.   The idea here was..IF a core can be cut in half, to place 
>> the 2 x halves back around the
>> coax turns... and then either glue em back together..or  perhaps use 
>> a ty-rap  around the circumference.
>>
>> If cores cant be cut,  I will have to disassemble the entire assy, 
>> and start from scratch, which Id
>> rather not have to do, pita.
>>
>> Jim   VE7RF
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