20-Inch Drill Press Replacement Table: Diagnose the Fit Before Replacing Anything
A 20 inch drill press is a big floor machine, and its table is a heavy casting that takes real abuse over the years, until it is cracked, badly pitted, or the trunnion is worn past adjustment. Before you go looking for a 20 inch drill press replacement table, diagnose exactly what failed, because the original casting is often discontinued and the smart replacement may be an upgrade rather than a like-for-like part.
A replacement table is the flat work surface that mounts to the column and supports your work. On a 20 inch press it is a large, heavy casting, so a correct replacement has to match your column diameter and mounting, carry the load, and sit square to the spindle.
Short answer: first confirm the casting is truly finished, not just in need of a trunnion cleanup or an auxiliary top. If it is, match a replacement to your column diameter and mounting, and expect that an aftermarket or upgrade table is often more available than the discontinued original.
Diagnose the fit before replacing
- Is it cracked or only pitted? A pitted but sound surface takes an auxiliary top; a cracked casting must be replaced.
- Trunnion worn out? If the table will not stay square even after cleaning and tightening, the pivot is worn.
- Column diameter. Measure it. Any replacement or clamp-on table has to match this dimension.
- Original availability. On an older 20 inch press the exact casting is often gone, so plan for an upgrade path.
The practical replacement path
When the original casting is unavailable, a common upgrade is a compound cross-slide table that clamps or bolts to the press and adds precise X and Y positioning. A cross-slide drill press table with adjustable travel gives you a flat, movable work surface and clamping, and it suits the heavier work a 20 inch press handles. Confirm the mounting and your column and travel needs before ordering.
The honest drawback: a cross-slide table sits higher and adds weight, reducing usable quill travel, and it is not a drop-in match for the OEM casting’s exact bolt pattern. Who should skip it: anyone whose original table is sound and only needs the trunnion serviced or a wood top added.
Step by step once you have the part
- Unplug the press.
- Remove the old table from the column, noting the collar and lock.
- Fit the replacement to the column, matching the diameter, and set the height.
- Square the new surface to a rod in the chuck in both directions.
- Lock everything and confirm the table holds position under a test load.
Confirm the failure, then match the column
Replacing a 20 inch table starts with proving the casting is actually done, then matching a replacement to your column and mounting. With the original often discontinued, an upgrade table is frequently the most available and capable path.
Three takeaways:
- Confirm the casting is cracked or worn out, not just pitted or loose.
- Measure your column diameter; every replacement has to match it.
- Expect an aftermarket or upgrade table when the original casting is discontinued.
FAQ
Can I replace just the table on a 20 inch drill press? Yes, if you can match the column diameter and mounting. The original casting is often discontinued, so an aftermarket or upgrade table is frequently the available option.
How do I know the table needs replacing? A cracked or warped casting, or a trunnion so worn the table will not stay square, needs replacing. A pitted but sound surface only needs an auxiliary top.
What do I need to measure first? The column diameter above all, plus your work size and how much quill travel you can spare, since a taller table reduces travel.
Will a cross-slide table fit my press? Many clamp or bolt to standard columns. Confirm the mounting and column diameter, and check that the added height leaves enough travel.
Does a replacement table reduce drilling height? An upgrade or cross-slide table sits higher than a bare casting, so yes, it reduces usable quill travel somewhat.
How do I set the new table square? Set a square against a rod in the chuck and the new surface in both directions, adjust, then lock and confirm with a test hole.
References
- VintageMachinery.org, drill press table and column documentation: http://vintagemachinery.org
