Mastering Milling Machines: Tramming the Spindle
- Jul 13, 2016
- 활동 지수 : 4995
MILLING MACHINES, PART 2:
TRAMMING THE SPINDLE
As promised in our June issue, we are giving you a
closer look at the milling head assembly and how to get the results
you're looking for as you begin machining with your CLIMAX milling machine. We'll review
the key steps and issues associated with tramming the milling
"When it comes to
fine adjust-ability, we have given the CLIMAX portable mills the same
adjustments you would see on a precision stationary mill. Tramming
the spindle is key to milling a precision "flat" or
- Jim Miller, Global Training Leader
The tramming plate is precision-machined to be
parallel to the ram and perpendicular to the bed. In many cases the
standard alignment of the milling assembly will be sufficient. If
more precision is needed, the milling head mounting plate is supplied
with tramming screws for fine adjustments. Repair technicians can use
the screws to adjust the quill housing away from the mounting plate
to adjust x-axis orientation. Also moving the vertical adjusting
screws up and down (which rotates about the center pin) for tramming
the y-axis orientation of the milling assembly.
- Make sure
power is disconnected.
- Attach a dial
indicator with a magnetic base to the end of the spindle.
- If the drive
motor is installed, remove it from the spindle gearbox to enable
easy hand-rotation of the spindle (Image 1).
- Position the
milling assembly in a position where you can reach the bottom of
the ram or the linear bed rails (image 2).
- Now, sweep the
datum surface of the bed or ram with the indicator by rotating
- Finally, tram
the direction along the Y-axis by adjusting the top tramming
screws.Then tram the direction along the X-axis by adjusting the
tramming screws on the milling head mounting plate. The mounting
screws will have to be loosened slightly to make these
adjustments. When both directions are adjusted, tighten the
mounting screws (below).
- Remove the
magnetic base and dial indicator, and reinstall the drive motor.
Do you have a question about milling machine set-ups
that we didn't cover here? Or is there a product you would like to
learn more about? Drop us a note and our team will get
back to you promptly!
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