Tramming Spindle

After positioning the head at an angle and when your operation requires that the spindle axis be precisely perpendicular to the table, you must tram or align the spindle with the table to ensure the spindle is exactly 90° to the table.

This procedure involves mounting a dial test indicator to the quill or spindle, rotating it around the table, and adjusting the spindle axis (Z-axis) 90° to the table X- and Y-axes, as illustrated in Figure 69.

Spindle

 

 

Z-Axis

Y-Axis

 

90º

90º

 

 

X-Axis

Table

Figure 69. Spindle Z-axis perpendicular to the

table X- and Y-axis.

We encourage you to research the many varia- tions of spindle tramming to find the one that works best for you. If you do not already have a preference for performing this operation, use the following widely-used procedure for accurately tramming the spindle to the table.

Keep in mind that all workpiece top surfaces are not exactly parallel with the table top. You may choose to tram the spindle to the top surface of the workpiece after it is mounted instead of that of the table.

Tools Needed

Qty

Dial Test Indicator

 

(with at least 0.0005" resolution)

.................. 1

Indicator Holder

 

(mounted on the quill/spindle)

1

Precision Parallel Block

 

(at least 9" in length)

1

-54-

 

Note: A precision-ground plate can be substi- tuted for the parallel blocks. Keep in mind that the farther the indicator point can be placed from the spindle axis, the more accurate the alignment measurements will be.

To tram the spindle to the table:

1.disCONNECT MILL FROM POWER!

2.prepare the mill for tramming by performing the following tasks:

Verify the table is clean by running your hand over the top of it. If necessary, stone the table to remove all nicks and burrs, then clean off all debris.

position the table for the milling operation you intend to perform after tramming— preferably centered with the saddle.

tighten any table, knee, quill, or ram locks that should be tight during the intended milling operation.

3.place the parallel block underneath the spin- dle.

4.install the indicator holder in the spindle or on the quill, then mount the indicator so that the point is as parallel to the block as possible (see the illustration in Figure 70).

Indicator Holder

 

 

 

 

 

Dial Test

 

 

 

 

 

Spindle

 

 

 

 

 

Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parallel Block

Table

Figure 70. Dial test indicator mounted.

Model G0747/G0748 (Mfg. Since 8/12)

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Grizzly G0747 and G0748 owner manual Tramming Spindle, To tram the spindle to the table

G0747 and G0748 specifications

The Grizzly G0747 and G0748 are advanced metal lathes designed for precision machining and versatility, catering to both amateur machinists and professional workshops. These machines stand out in the realm of metalworking equipment, thanks to their robust construction and innovative features.

One of the key attributes of the G0747 and G0748 is their solid cast iron construction, which provides excellent vibration dampening during operation. This enhances stability and precision, crucial for producing high-quality machined parts. Equipped with powerful motors, both models are capable of handling a wide range of materials, from aluminum to harder metals like steel.

The G0747 features a variable speed drive system, allowing users to adjust the spindle speed based on the project at hand. This flexibility is beneficial for tasks that require different cutting speeds, enabling machinists to optimize cutting performance and tool longevity. Its variable speed output ranges, alongside smooth torque delivery, make it ideal for intricate turning operations.

On the other hand, the G0748 includes an advanced digital readout (DRO) system. This feature provides real-time feedback on the machine's position and speed, significantly improving accuracy in measurements during machining tasks. The DRO system allows operators to set precise limits and keep track of their progress, essential for complex projects where exact dimensions are critical.

Both lathes are equipped with a user-friendly interface, making them accessible for beginners while still offering advanced functionalities that seasoned professionals appreciate. They include multiple tooling options, allowing for an expansive range of machining techniques including turning, threading, and drilling.

Moreover, the G0747 and G0748 come with a comprehensive assortment of accessories, such as different types of chucks and tool holders, which further extends their capabilities. The ease of changing tooling and quick setup times are significant advantages for shops aiming for efficiency and versatility in their operations.

In conclusion, the Grizzly G0747 and G0748 metal lathes are exemplary units that balance power, precision, and user-friendliness. Their advanced features, such as variable speed capabilities and digital readouts, equip machinists with the tools necessary to produce exceptional work. Whether for hobbyists or industrial applications, these lathes are built to meet a variety of machining needs with impressive performance and reliability.