Delta 11-990 Drill Press: Is It the Right Benchtop for Your Shop?
Most people find the Delta 11-990 the same way: they’re hunting for a used benchtop drill press, they see this model number come up, and they’re not quite sure what they’re looking at. Is it a step up from the 11-950? A step sideways? A totally different machine?
Short answer: it’s an evolution — same core architecture, updated for a later production era, with some refinements and some trade-offs depending on when and where yours was made. Here’s everything you need to know.
Delta 11-990 Specifications
| Specification | Value |
|---|---|
| Swing | 11 inches |
| Spindle travel (quill) | ~2.5 inches |
| Spindle speeds | 5 speeds |
| Motor | 1/3 HP (some types: 1/2 HP) |
| Chuck size | 1/2” Jacobs keyed chuck |
| Chuck taper | JT33 |
| Table size | ~6.5” × 6.5” |
| Table tilt | 45° left and right |
| Column diameter | ~2.375” |
| Weight | ~45–60 lbs |
Specifications vary by type number. Consult your nameplate and original manual for exact values.
Delta 11-990 vs. Delta 11-950: What’s Actually Different?
| Feature | 11-950 | 11-990 |
|---|---|---|
| Swing | 11” | 11” |
| Speeds | 5 | 5 |
| Chuck taper | JT33 | JT33 |
| Cast iron table | Yes | Yes |
| Production era | Earlier | Later |
| Parts availability | Good | Good |
| Motor options | 1/3–1/2 HP | 1/3–1/2 HP |
The honest take: The two machines are more similar than different. The 11-990 is the successor rather than a replacement. Delta retained the core design and made incremental changes — sometimes to the casting geometry, sometimes to the motor sourcing, sometimes to the guard design.
What this means practically: parts are often interchangeable between types, and owners of both machines report similar experiences. If you’re choosing between the two at the same price, buy the one in better condition. If the 11-950 is significantly cheaper and in similar shape, it’s probably the better buy.
Who the Delta 11-990 Is Built For
Home woodworkers and hobbyists who drill mostly in wood, plywood, and occasionally aluminum. More than enough power and precision for all standard woodworking operations.
Small shop professionals who need a reliable benchtop tool for periodic use. For a cabinet shop or sign shop that drills a few times a day, it’s entirely capable.
Vintage tool enthusiasts who understand that buying right on a vintage tool and maintaining it properly beats buying cheap and replacing often.
Not the right machine for: Heavy production drilling in steel, large-diameter bits in hard metals, or applications requiring more than 1/2” chuck capacity.
Used Buying Checklist for the Delta 11-990
Spindle runout: Insert a ground rod or known-straight bit and run the spindle. Watch the tip for wobble. More than 0.005” suggests worn spindle bearings.
Quill operation: Push through full travel. Should be smooth with no binding. Return should be crisp and complete.
Belt condition: Open the head cover and look at the V-belt. A fresh belt makes an enormous difference in vibration and smooth operation. Sizing note: the V-belt () is a candidate for the 11-990 — but verify length against your drive distance before purchasing, as pulley configurations vary by type. Measure the existing belt or use your parts diagram.
Table lock and column: Lock the table and try to deflect it. Any movement means a worn lock. Inspect column for rust or scoring.
Chuck integrity: Tighten down a known bit and watch for wobble under power. A JT33 keyed chuck is a direct swap if the original is worn.
Motor behavior: Should start without hesitation, reach speed quickly, run smoothly. Slow start without grinding suggests a failing capacitor — inexpensive to fix.
Completeness: Chuck key, all three quill feed handles, depth stop assembly, table lock handle, belt cover.
Parts for the Delta 11-990
eReplacementParts.com — Primary source. Search by model and type number.
deltamachinery.com — Delta’s current parts catalog.
eBay — Best for cast iron components from shop liquidations.
VintageMachinery.org — For manuals and original parts lists.
Recommended Upgrades
If the chuck shows any runout, a JT33 keyed drill chuck is a direct fit and often improves on a worn original.
Fresh belts make an enormous difference in vibration and smooth operation. Confirm belt length before ordering — see sizing note above.
A magnetic LED work light attaches to the head casting without modification and transforms visibility on the workpiece, especially for precision layout work or drilling small-diameter holes.
Verdict
The Delta 11-990 is a solid, well-built benchtop drill press that holds its own against most of what’s sold new today at equivalent prices. Find one in good mechanical condition for under $150 and it’s a strong buy. The cast iron construction, JT33 spindle, and straightforward mechanical design mean it’s fully serviceable with off-the-shelf parts.
Between the 11-990 and 11-950: buy whichever is in better condition at the price you’re looking at. Either machine, properly maintained, is a better long-term decision than a new budget press at the same price.
FAQ
Q: What’s the difference between the Delta 11-990 and 11-950? Both are 11-inch swing benchtop drill presses with JT33 spindles and 5-speed V-belt drives. The 11-990 is a later production evolution. Buy whichever is in better condition.
Q: What chuck does the Delta 11-990 use? A JT33 Jacobs-taper keyed chuck in 1/2” capacity. A replacement JT33 chuck is a direct swap.
Q: What V-belt does the Delta 11-990 take? A standard 4L-series fractional-horsepower V-belt. Measure your existing belt or consult your parts diagram before ordering. The belt is a candidate but verify length fits your specific machine.
Q: Where can I find the Delta 11-990 manual? VintageMachinery.org is the best free source.
Q: Is the Delta 11-990 good for metalworking? It can drill metal at slow speeds with proper cutting fluid and low feed pressure. Not a metalworking press, but fine for occasional holes in aluminum or thin steel.
Q: How do I know which type number my 11-990 is? The type number is on the metal nameplate, usually on the head casting. Appears as “Type” followed by a number.
Q: Are Delta 11-990 parts interchangeable with 11-950 parts? Many are, but not all. Cross-reference part numbers against your specific type before assuming compatibility.
Q: What should I pay for a used Delta 11-990? In working condition, $75–$175. Non-runners with intact cast iron worth $40–$75 if you’re willing to do basic mechanical work.
Q: Can the Delta 11-990 drill a 1/2” hole in hardwood? Yes, comfortably. Use a sharp brad-point or Forstner bit, set the speed appropriately (slower for large-diameter bits), and apply steady feed pressure.
References
- eReplacementParts.com Delta drill press parts: ereplacementparts.com
- Delta Machinery parts lookup: deltamachinery.com
- VintageMachinery.org Delta literature archive: vintagemachinery.org
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