Central Machinery 16-Speed Drill Press Parts: Model Numbers, Fit, and Buying Checks

Central Machinery 16-speed drill presses come in several configurations, benchtop and floor-standing, 13-inch and 17-inch swing, and multiple item numbers across Harbor Freight’s production history. That variety is the first thing to resolve before ordering any part: the item number on your machine determines which parts diagram applies, and two 16-speed presses with different item numbers may not share a belt size, spindle part, or switch. This guide covers model numbers, fit checks, and buying steps so you get the right parts the first time.

Across the 16-speed Central Machinery family, key named components include the pulley nut, spindle shaft, M26 V-belt (common across many versions; confirm for yours), feed handle, quill spring cap and quill spring, wedge drift, spindle pulley, switch box with no-volt switch, table support, and arm with scale. The chuck mounts on a JT33 taper. These names appear in the parts diagram and are the language for ordering correctly.

Straight answer: find the item number on the machine, download the parts diagram for that item number from Harbor Freight, and order model-specific parts using the diagram’s numbered references. Match universal consumables (belt, chuck, key) by size. The item number is more reliable than the speed count or machine size for identifying the correct version.

Finding your item number and parts diagram

The item number is on the machine’s head or column label. Common item numbers for 16-speed Central Machinery presses include 43389 (13-inch benchtop), various 17-inch floor-model numbers, and the heavy-duty variants. Once you have the number:

• Use Harbor Freight’s manual-lookup tool to download the parts diagram for your item number.
• The diagram shows every numbered component and a reference table with part names.
• Use the numbered references when requesting parts from HF’s parts service.

Do not assume parts from one 16-speed item number fit another. Even within the same speed count and swing size, HF has revised components between production runs.

Buying checks for common parts

Belt: Confirm the belt size from the old belt’s markings (look for a size code like “M26” or a dimensional marking molded into the rubber). Many 16-speed Central Machinery presses use an M26 belt, but verify before ordering; some floor models use a different size.

Chuck: A 5/8-inch keyed chuck with a JT33 arbor is a direct replacement on JT33 spindles. A universal ratcheting chuck key covers a lost key. A drill press vise improves accuracy and safety on any table.

Quill spring: Order from HF’s parts service using the diagram number. If unavailable, a spring matched by its wire diameter, outer diameter, and free length can substitute.

No-volt switch: The large paddle-style safety switch. Order from HF parts if available; if not, a compatible paddle switch of matching voltage and amperage rating works as a substitute, though it requires confirming the terminal configuration.

The honest flaws

Two honest points. First, because Central Machinery is a Harbor Freight house brand, structural parts are stocked at HF’s discretion, and older item numbers may have parts that are no longer available; a used-parts donor of the same item number is the fallback for truly unavailable components. Second, the visual similarity between 16-speed models creates false confidence; resist ordering by appearance alone and always verify the item number first.

Conclusion: item number, diagram, then order

Central Machinery 16-speed parts are matchable once you have the right item number and diagram.

• Find the item number on the machine’s label; it is more specific than the speed count or swing size.
• Download the parts diagram for that item number from Harbor Freight’s manual-lookup.
• Match the belt and chuck by size; use the diagram’s numbered references for structural parts.
• Source unavailable structural parts from a used-parts donor of the same item number.

FAQ

What item numbers do 16-speed Central Machinery drill presses use? Common ones include 43389 and various 17-inch floor-model numbers. Check the label on your machine.

Are parts available from Harbor Freight? Some are, through HF’s parts service. Availability varies by item number and machine age.

What belt do 16-speed presses use? Many use an M26 V-belt. Confirm the size from the old belt’s markings before ordering.

What chuck taper does this press use? JT33 (Jacobs #33). A 5/8-inch keyed chuck with a JT33 arbor is a standard replacement.

How do I find a used-parts donor? Search for the specific item number on eBay or Craigslist. The same item number ensures the parts are from the same production version.

Do benchtop and floor-model 16-speed presses share parts? Not necessarily. They are different item numbers with different parts diagrams. Confirm the item number before assuming cross-compatibility.

References

• Harbor Freight Tools, parts service: https://www.harborfreight.com/customer-service/parts-service.html
• Harbor Freight Tools, manual lookup: https://www.harborfreight.com/customer-service/manual-lookup.html
• ManualsLib, Central Machinery drill press manuals: https://www.manualslib.com/brand/central-machinery/drill-press/