What are the four types of tool posts?

Explanation:

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The tool post holds and firmly supports the tool or tools. The tool post is fitted on the top slide.

The commonly used types of tool posts are:

American type tool post or single way tool post 

• It consists of a circular tool post body and a pillar with a slot for accommodating the tool or tool holder.
• A ring base, a rocker arm (boat piece), and a tool clamping screw complete the assembly of this type of tool post. 
• Only one tool can be fixed in this type of tool post.

Indexing type tool post or square tool post

• It is also called a square tool post or a four-way tool post.
• Four tools can be fixed in this type of tool posts, and anyone can be brought into the operating position, and the square head is clamped with the help of the handle lever.
• By loosening the handle lever, the next tool can be indexed and brought in to the operating position. The indexing is manual.

Quick change tool post

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• Modern lathes are provided with this type of tool posts.
• Instead of changing the tools, the tool holder is changed in which the tool is fixed.

British type tool post

• This type of tool posts is found mostly in British lathe.
• This also has provision for only one tool to be clamped for performing the operation.

Maybe you have noticed that we have 2 different types(see picture below), wedge and piston, and 5 different styles of quick change tool set, which are 0XA, AXA, BXA, CXA and CA. Usually, wedge type tool post is believed that it holds the tool holders tighter than the piston type tool post. However, the piston type tool post is somewhat cheaper than the wedge type tool post. We would recommend piston type tool posts to those who operate less heavy duty machining work to save money.

The 5 different styles are related to the very important parameter mentioned above, lathe swing. For example, the lathe swing value you have measured is between 6'-12', then the AXA style quick change tool set will be good for use. To be more specific, if the measure of your lathe swing is 11', then both AXA style and BXA style QCT set would be appropriate for your lathe. However, in this case, to fully take advantage of your very lathe, we highly recommend the BXA style QCT set instead of AXA style. The larger your tool post is, the more options you have in your machining work. For example, the maximum shank size for usual AXA style tool holders is 0.5 inch and is 0.625 inch for BXA style. If we include the XL turning and facing holder, the maximum shank size for AXA and BXA can reach 0.625 inch and 0.75 inch respectively. A larger shank size generally brings higher efficiency to the machining work and is also more durable than a smaller tool. So, when your lathe is ready for two different sizes QCT set, just choose the larger one.

A standard set of quick change tool set includes 6 pieces in total. The biggest one in a set is the quick change tool post, which is designed to replace the original 4-way tool post on your lathe. All other holders in this set will eventually be installed on the tool post.

The rest of the tool holders are:

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• Turning and Facing Holder #1,
• Boring, Turning and Facing Holder #2,
• Heavy Duty Boring Bar Holder #4, Universal Parting Blade Holder #7,
• Knurling Tool, Turning and Facing Holder #10