In Defence of the 4-Way: Myford Toolholding

The video compares quick change and four way tool posts, highlighting the efficiency and cost-effectiveness of the four way system. It explains the setup and adjustment processes for each type, emphasizing the advantages of using shims for tool height adjustments. The video concludes with a recommendation for the four way tool post, while acknowledging the benefits of high-quality quick change systems in specific scenarios.

What is the main advantage of the quick change tool post?

• It is more cost-effective than the four-way tool post.

• It requires no tools for adjustment.

• Each tool is allocated its own holder for easy interchange.

• It allows multiple tools to be mounted simultaneously.

Why might the four-way tool post be considered less efficient?

• It requires shims for tool height adjustment.

• It is more expensive than the quick change tool post.

• It requires a spanner for every tool change.

• It can only hold one tool at a time.

What is a key benefit of the four-way tool post in terms of repeatability?

• It can achieve a final diameter within 10 microns of nominal size.

• It can hold more tools than the quick change tool post.

• It allows for quick tool changes without any tools.

• It is more affordable than the quick change tool post.

How is the knurling tool mounted in the four-way tool post?

• Using a spanner to tighten a single bolt.

• By using a quick release mechanism.

• Using an Allen key to tighten two bolts.

• By simply sliding it into place.

What is a significant advantage of using shims for tool height adjustment?

• They allow for iterative adjustments.

• They are easier to find than a nerve thumb screw.

• They are more precise than a nerve thumb screw.

• They are more expensive than a nerve thumb screw.

What is a benefit of the four-way tool post in terms of structure?

• It has more overhang than the quick change tool post.

• It allows for tool setting to an arbitrary angle.

• It is lighter than the quick change tool post.

• It requires fewer tools for adjustment.

In what situation might a quick change tool post be preferable?

• When cost is a primary concern.

• When using a wide variety of tools simultaneously.

• When space is limited, such as on a watchmaker's lathe.

• When working with large machinery.