Moore G18 jig grinder - critique this video...
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  1. #1
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    Default Moore G18 jig grinder - critique this video...

    Mainly....is it typical loudness ? Some is the vacuum of course, but the spindle pneumatic turbine sound ?

    YouTube

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    Quote Originally Posted by Milacron View Post
    Mainly....is it typical loudness ? Some is the vacuum of course, but the spindle pneumatic turbine sound ?

    YouTube
    I agree sounds kinda way too loud / something not quite right there.

    Probably works but... That howling is pretty intolerable. Admittedly the other sounds seem a little amped up with sound reflecting against the hard surface of the wall but still.

    Even the reciprocating head sounds a bit harsh / hollow sounding, but is probably OK.

    @Milacron do you rebuild or retrofit jig grinders ?

    Ta.

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    Doesn't sound like any of the Moore jig grinders I've run (3-4). It's been about 20 years but I recall all of them had a distinct turbine whine as they spooled up. A lot of the spindle noise may have something to do with how the air exits the exhaust port if something isn't OEM. I didn't notice any change in the exhaust "note", which I recall has having a much higher pitch/frequency, as the spindle speed spooled up either and that may/may not indicate something. There are enough other members here that still run one of the Moore's that I'd be interested hearing their opinion before reaching a conclusion. They do make noise but not like that one.

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    Start the linked video at 15:20 for turbine spool. Even the head rotation (before spindle on) makes a lot less noise.

    YouTube

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    It sounds like it has a low speed head mounted on it.

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    Low speed head.If you think that's bad try running a 175k head for a week.

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    Quote Originally Posted by split tenth View Post
    Low speed head.If you think that's bad try running a 175k head for a week.
    Did that many times. Try doing it in a single room with 38 jig grinders running 10 hours a day!

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    Does it sound any different without that long tool in there?

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    I'll agree, that's a low speed high power head. Hear the low sounds when he just starts the motor? That sounds to me like a big air motor.

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    Quote Originally Posted by ToolFixer View Post
    Does it sound any different without that long tool in there?
    That head will sound the same with or without the tool. If memory serves, it has a 40k max spindle speed. We used them for jig milling with single flute carbide cutters. I haven't run a jig grinder since about 1984 but you never forget the sounds.

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    I do a lot of work on a G18(photos in my album). It sounds good to me, the head is probably getting close to rebuild time. Like said above, a week or two of 175K small hole grinding gets real tiresome.


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