Our Blog - See Examples of Spindles We've Repaired

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Welcome to our blog. Here, you'll find examples of spindles we've repaired in the past. We explain what was wrong, have images, videos and more. If you're looking for more specific brand information, or can't find a brand click here, or try the "brands" link above.

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    • Okuma Howa 438 Spindle

    Okuma Howa 438 Spindle

    10,000 rpm

    Grease lubricated

    The main cause of failure for this spindle was rear bearing failure. When the rear bearing failed the encoder sensor was damaged. The 40 taper had run out and needed a kiss grind. The drawbar was worn where the belleville washers sit and needed to be reconditioned to insure proper drawbar actuation.

    Northland Tool replaced the sensor, kiss ground the taper , reworked the drawbar and rebuilt the spindle. During the installation process we stayed in close contact with the installation personnel to make sure everything went smoothly.

    Categories: CNC Machining Industry,CNC Spindles,Okuma Howa Spindles

    Sandy @ 9:25 am


    Okuma Howa Millac 44H3
    Okuma Howa Millac 44H3

    Okuma Howa Millac 44H3

    12,000 rpm
    Stator driven
    Our customer complained of premature spindle failure (less than 1 year running time). We found the spindle had been contaminated from the front with liquid coolant. We reworked the contamination prevention characteristics and gave advice on how to prevent contamination.
    Categories: CNC Machining Industry,CNC Spindles,Milling Spindles,Okuma Howa Spindles

    Sandy @ 12:01 pm


    Okuma Howa 550H
    Okuma Howa 550H

    Okuma Howa 550H

    6000 rpm
    Stator driven
    Spindle was crashed, shaft nose was cracked, rotor came loose and rubbed out on rear housing.  Rear housing was egged shaped.  The taper had 20+ microns of runout.
    Northland Tool & Electronics replaced the bearings, ground/plate/ground the rear housing and 50 taper.  Kiss ground the front journal and shoulders.  Welded and machined the cracks in shaft nose.
    Categories: CNC Spindles,Medical Industry,Milling Spindles,Okuma Howa Spindles

    Sandy @ 10:48 am


    Okuma Howa M511V
    Okuma Howa M511V

    Okuma Howa M511V

    Spindle taper was below gage line and had run out. The front bearings had failed. We brought the taper back to specification with a grind plate grind and reassembled the spindle.
    Categories: CNC Machining Industry,CNC Spindles,Milling Spindles,Okuma Howa Spindles

    Sandy @ 9:36 am


    Okuma Howa Millac 4

    Okuma Howa Millac 4

    Okuma Howa Millac 4

    This spindle was crashed causing the front labyrinths to friction weld together. The taper and front bearing journal had run out. We manufactured replacement labyrinth parts and ground plate ground the taper and front bearing journal.

    Categories: CNC Spindles,Milling Spindles,Okuma Howa Spindles,Weapon Manufacturing Industry

    Sandy @ 9:09 am


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