Oliver 4235, Owner'S Manual, Page: 27 / 64

4235 Jointer OLIVERMACHINERY.NET 27 | Page
Operation
Preparation
For safety and to achieve the best results, please take the following steps before jointing a workpiece.
Inspect Workpiece
Only use this jointer for natural, quality wood materials. Cracked stock, board with loose knots, plywood,
and other engineered wood products can break apart and cause severe kickbacks, which can lead to
severe injuries and machine damages.
Do not use this jointer to cut treated lumber or anything that contains harmful chemicals. This will spread
wood dust that contains such harmful chemicals.
Carefully inspect workpieces for foreign objects. Nails, staples, rock chips, and other objects embedded
on the wood surface will damage the jointer. It is advised to clean a workpiece with a stiff brush to remove
all dirt and foreign objects ahead of time, especially for rough sawn or reclaimed lumber. Use a metal
detector to scan for metal objects as needed.
Check Dimensions
To avoid accidental contact with the cutterhead, NEVER process stock that is:
1. Shorter than 10 ”
2. Thinner than 3/4 ” (for surface planing)
3. Less than 2” wide (for surface planing)
Support Long Workpiece
Support long stock with rollers or other devices to avoid injuries. This also helps to create a smooth,
consistent finish.
Check Moisture Content
Check the moisture content of workpieces . “ G reen wood” with moisture content over 20% will not cut
properly and may jam the machine. Excessive moisture content will also cause the jointer ’s unpainted
surface to rust. Besides, as the workpiece dries, the once-flattened surface can become fuzzy and warped
again. It is recommended to allow a workpiece to dry and stabilize before it is processed.
Warped Stock
Avoid using severely warped boards, as they can be unstable and might cause severe kickback or
disintegrate when it is cut.
Glue Deposits
Glue left on the workpiece surface can dull cutters and lower cut quality. Scrape off all glue deposits from
the workpiece before jointing a workpiece.