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MAINTENANCE

WARNING: 

When servicing, use only identical WEN replacement parts. Use of other parts may be 

hazardous or induce product failure.

WARNING: 

To avoid accidents, turn OFF the lathe before cleaning, adjusting, or performing any 

maintenance or lubrication work.

CLEANING & LUBRICATION

The more care you give your chuck, the longer service life it will give you. For more information on lathe 

maintenance visit 

wenproducts.com

 and search model number LA4275 - you will find links to helpful main-

tenance guides on the product page.
1.  Your chuck will get dirty as it collects chips, dust and other debris from your turning projects. Wipe your 

chuck down after each use with a soft cloth.

2.  If you choose to use compressed air to spray away debris, direct the air outwards, spraying from the 

center. Limit air pressure to 25 PSI or lower.

3.  Apply a dry lubricant (PTFE works well) to the moving parts of the chuck to ensure smooth movement. 

NOTE: 

Use only dry lubricants - a wet lubricant or grease will cause dust and chips to stick, possibly 

getting into the interior of the chuck and lead to decreased performance or damage.

4.  Occasionally use a small brush, such as a toothbrush, to get hard-to-reach chips off the jaws, jaw 

carriages, body, etc.

5.  Occasionally, open up the jaws and use a wire bottle brush to clean the scroll screw. Run the brush along 

the screw while turning the chuck key in the keyhole.

6.  If desired, you may decide to occasionally tear down your chuck and give it a thorough cleaning. The 

frequency of this maintenance depends on how often you use the chuck, the species of wood being 

turned, the size of chips, etc. Visit 

wenproducts.com

 and search model number LA4275 - you will find a 

link with a helpful deep cleaning guide on the product page.

DISPOSAL

When the product reaches the end of its lifetime, please do not dispose of parts with your household waste. 

This product contains components that should be recycled. Please take this product to your local recycling 

facility for responsible disposal to minimize its environmental impact. 

Please recycle the packaging and components where facilities exist.

INSTRUCTION MANUAL

INSTRUCTION MANUAL

2

3

1. Turn OFF and unplug your lathe.

2. Mount the screw chuck in your chuck with an internal grip. The bottom lip of the screw chuck should be 

under the jaws to help hold it in place. See Fig. 4.

3. The base of the workpiece should be flat and square to its sides. Using a 3/8" drill bit, drill a pilot hole 

straight down into the center of the workpiece, approximately 31mm (1-7/32") deep.

4. Screw the workpiece onto the screw chuck. The base of the workpiece should be flush against the top of 

the jaws. See Fig. 5.

Chuck 

Body

Jaw

Face

Screw 

Chuck

Chuck

Key

Lip

Fig. 4 

Flush

REMOVING THE GREASE

Your chuck comes with a protective layer of grease coating its 

surfaces. Before you use the chuck, use a dry cloth to remove 

the protective layer of grease.

USING A LIVE CENTER

If turning long workpieces, use a live center in your tailstock to 

support the workpiece. Refer to your lathe's manual.

MOUNTING THE CHUCK ON YOUR LATHE

This chuck is compatible with the entire line of WEN wood 

lathes along with any other wood lathe that has a headstock 

spindle of 1 inch diameter and 8 threads per inch (1"-8).

1. Thread the chuck onto the headstock spindle by turning the 

chuck clockwise. Hold the headstock handwheel to keep the 

spindle stationary. 

NOTE: 

Depending on your lathe, there may 

be a different method for keeping the spindle stationary, such 

as a spindle key or another tool.

2. While holding the spindle stationary, insert the chuck key 

and use it as a handle to turn the chuck clockwise on the 

spindle until the chuck is fully secured.

OPENING/CLOSING THE JAWS

1. With the chuck mounted on the lathe, you can open or close 

the chuck jaws to secure your workpiece. Insert the chuck key 

into the key hole on the chuck body. See Fig 4.

2. 

To open the jaws: 

Turn the chuck key counter clockwise.

3. 

To close the jaws:

 Turn the chuck key clockwise.

4. Place your workpiece flush against the jaw face.

5. Open or close the jaws to internally or externally grip your 

workpiece (Fig. 1 & 2). The jaws should be fully tightened on 

your workpiece.

6. To remove the workpiece from the chuck, open or close the 

jaws to release the grip. Hold your workpiece as you release 

the grip so it does not fall.

MOUNTING THE SCREW CHUCK

Your LA4275 chuck comes with an M8-3.0x20 screw chuck. 

The screw chuck is helpful when turning larger workpieces.

OPERATION

Fig. 5 

16

4.50

12

5

17.05
19.45

Jaw Carriage

NOTE:

 All measurements are in mm.

Fig. 3 

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