4″ 1″~10 Threaded 3-Jaw Backplate
Fits most plain back chucks.
Must be machined for concentricity.
Made of high grade casting steel.
Assembly instructions included.
Bolt circle is 3.3″.
Number of bolt holes is 3.
4″ threaded 1″-10 backplate adapter for a 3-jaw chuck is essentially a component used in machining and lathe operations. Here’s a breakdown of what each part of the description entails:
- 4″ Backplate: The backplate itself has a 4-inch diameter, compatible with lathes or chucks of a similar size. The backplate is what allows the chuck to be mounted to the lathe.
- Threaded 1″-10: This refers to the thread size on the backplate that matches the lathe spindle. Here, it’s 1 inch in diameter with 10 threads per inch (TPI), a standard size often found in smaller lathes.
- 3-Jaw Chuck Compatibility: A 3-jaw chuck is commonly used for holding round or hexagonal workpieces as it centers the work automatically. The adapter backplate is designed to mount this type of chuck securely to the lathe.
Purpose of a Backplate Adapter
The backplate adapter serves as a bridge between the lathe’s spindle and the chuck, making it possible to use a chuck on a lathe with a different spindle thread size. It provides stability and precision, ensuring the workpiece remains secure and centered during machining.
Considerations When Selecting or Using a Backplate Adapter
- Compatibility: Ensure the adapter thread matches the spindle size on your lathe (1″-10 in this case).
- Material: Steel or cast iron are common materials due to their strength and durability.
- Installation and Alignment: Proper alignment is crucial for accuracy in machining. The backplate often needs to be machined to fit the chuck precisely.
Additional Information
If you’re shopping for this adapter, verify the specifications carefully. Some backplates might require minor machining to ensure a perfect fit with the chuck, and not all backplates are universal.
