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Fadal VMC Box Ways

Gibs and Straps



Click On Image By Casting To Select Proper Gibs

Table Straps

Strap Assemblies
for the X Axis

Saddle Straps

Strap Assemblies
for the Y Axis

Head Straps

Straps Assemblies
for the Z Axis

Strap-less Gibs

Individual Gibs
for the X, Y, or Z Axes

All Box Ways - Gibs, Gibstraps and Casting Rebuilds

Gibs and Gibstraps, the same exact material and made with the same process and made to the original specifications.

Maintenance has a distinct advantage with the simplicity of the Box Way machine deign. 
All Box Way milling machines employ precision ground slide ways. The saddle, table, and the head all ride along a box slide way. After time the parts that ride along the slide ways begin to wear. To compensate for this wear, machine tools are equipped with adjustable parts called gibs that allow you to eliminate the space that has been created by the wear between the slide ways.  Simply adjust or replace the gibs as needed. With Linear way machine your required to disassemble the machine to replace the entire way system.

There are two types of gibs with your Fadal machine, straight gibs and tapered gibs.

Tapered Gibs:

Pictured above is a tapered Gib.  The screws push the Gib in to create more contact with the Way Surface.  There are two types of materials used, the bronze as above, left or the Steel with Trucite bonded as a bearing surface on the right.
bix beiderbecke Straight Gibs:

The straight gibs (above) are not adjusted, they are precision machined to match your way thickness of the saddle and attach the X table to the top of the saddle casting.

Gib Strap Assembly:

The Strap Assembly is used to attach the Z head to the column and the Y axis saddle to the base of the machine.


Casting Rebuilds:

We also provide rebuilding Saddle, Table and Head, contact us for more information.



History of the Fadal Machine Gib System:
Originally, the first design was a self adjusting gibs using Belleville springs to maintain the Gib contact pressure but unfortunately it proved to be complicate to set-up and expensive to produce.
In the development of the VMC-40, the team experimented with adjusting gibs by measuring the motor current as the gibs were tightened.  When the Gibs are properly adjusted, it amazing how little torque is required to move a big slide.

We also experimented with some of the first adjustable gibs designs that were made out of Aluminum. Trying to keep the material and labor costs down but even though they did preformed well, a dry spot on the Way surface would cause the aluminum to gaul.  The steel with Turcite and Bronze material proved far superior.

What is Turcite?  Simply put, it's a non-stick surface like Teflon.  Teflon was developed by NASA and is commonly used for as a non-stick cooking surface but it is to soft for machine tools, where Turcite is a very durable non-stick surface, easily applied to cast iron.
Turcite B® is PTFE (polytetrafluoroethylene) resins and added fillers such as bronze.  It increases accuracy, reduces damage caused by mechanical breakdowns and lubrication failures, extends the life of mechanical components, saves energy, and improves stick slip performance.

The traditional box way machine relied on the way lubrication system to prevent premature wearing and surface gualing. With Turcite, it's bonded to one side of the way surface.  With the Fadal machine we bonded it to the bottom of the Table, Saddle and the Z Head that contacts the Column ways.
Should the lubrication system fail, the way system will not be immediately damaged.  However, without lubrication the Turcite will wear prematurely.  Maintaining the way lube circulation is critical to extending the life of the Turcite surface.