Jet vertical mill

[R.W. Parker]

Greetings all,

I have a Jet JVM-728, it's a ram-turret vertical knee mill that also has a horizontal spindle. Decent machine, but the bearings in its vertical spindle are getting long in the tooth. I want to minimize down time as much as possible, so I'd like to have the correct replacement bearings on hand before I tear down the head. I'd appreciate hearing from any other JVM-728 owners who've replaced these.

Thanks!

Richie

 

[Ulma Doctor]

Hi Richie,
welcome aboard
i don't have the Jet 728, but i have a VHM726- they should be very similar
the 3 spindle bearings were 6008 bearings in my unit, yours may be the same.

 

[R.W. Parker]

Hi Ulma,

Thanks for the welcome, as well as the information. I take it that you've had the head apart on your machine, is there anything out-of-the ordinary that might rear its ugly head? I've searched for an exploded diagram, but can't find one anywhere.

Best regards,

Richie

 

[Ulma Doctor]

Hi Ulma,

Thanks for the welcome, as well as the information. I take it that you've had the head apart on your machine, is there anything out-of-the ordinary that might rear its ugly head? I've searched for an exploded diagram, but can't find one anywhere.

Best regards,

Richie

Hi Richie,
i got to go far away for work today. i'll scan and share a copy of what i have
the spindle comes out pretty easy

 

[R.W. Parker]

Wow, that'd be GREAT! I really appreciate it, thanks.

 

[Ulma Doctor]

Wow, that'd be GREAT! I really appreciate it, thanks.

I apologize, Richie
i had a 14 hour day today. i'm gonna need another day to scan and share the manual i have
sit tight, i'll get back at you tomorrow

 

[Ulma Doctor]

i apologize in advance for the electrical ladder diagram.
it was cut off at the bottom on the copy i have

 

[R.W. Parker]

Doc, that's my machine EXACTLY! I've been looking for those diagrams for YEARS, with no luck. How unbelievably kind of you to send those, I simply can't thank you enough! You're a prince, buddy.

God bless!

Richie

 

[R.W. Parker]

Oh, and one other thing, if you don't mind. When I order those 6008 spindle bearings, is there any special prefix or suffix that I should include? Seems there are a few different 6008's, and some are a lot more expensive than others. I just want to be sure that I order the proper bearings.

Thanks again!

Richie

 

[Ulma Doctor]

Hi Richie,
6008 C3 or C2 should be sufficient
6008-2RS/C3
Or
6008-2RS/C2

the -2RS designation is 2 neoprene seals, lifetime lubricated

C3/C2 is the clearance
C3 is a little looser than C2