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Unibor step drill with Weldon shank three stepped diameters

Unibor

Unibor 19X7/16E3 Weldon Shank Step Drill 7/16in 9/16in 3 DIAS

SKU CH-9PFK-Z2H7D

Weldon shank step drill creates three hole sizes from 7/16 to 9/16 inch

  • Weldon shank ensures secure fit in magnetic drills
  • Three diameter steps cover 7/16in to 9/16in range
  • Unibor brand built for professional metalworking
  • Step design drills multiple hole sizes with one tool
  • Manufacturer ships direct on orders over 75

Unibor Weldon Shank Step Drill

The Unibor 19X7/16E3 is a Weldon shank step drill designed for drilling multiple hole diameters in a single pass. It suits metalworkers and maintenance technicians who need to enlarge existing holes or create stepped holes in sheet metal and plate. The tool covers three diameters ranging from 7/16in to 9/16in.

Weldon Shank Installation Notes

The Weldon shank locks into a compatible magnetic drill or drill press chuck using a set-screw flat, so ensure your machine accepts this mounting style. A common issue is using the tool in a standard three-jaw chuck without the flat engaged, which causes slippage and damages the shank. Use cutting fluid and steady pressure to prevent the steps from binding.

Pre-Purchase Compatibility Check

Verify that your magnetic drill or drill press has a Weldon shank receiver before ordering. Confirm the material thickness you intend to drill does not exceed the tool's effective step length. Buyers who need a straight shank for a hand drill or a larger diameter range should look for a different tool configuration.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $45.99
Cheaper than about 64% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameUNIBOR

Questions about this item

How can I verify the 19X7/16E3 step drill is cutting cleanly through the 7/16in, 1/2in and 9/16in diameters after I mount it?

Check that each of the three steps produces a smooth, round hole without chatter or excessive force, and that the Weldon shank remains firmly seated in the magnetic drill chuck during the cut.

What comes with the 19X7/16E3 and what must I source separately to use it?

The package contains the step drill itself with its integrated Weldon shank; you will need a compatible magnetic-base drill and cutting fluid, which are not included.

When should I choose the 19X7/16E3 over other Unibor step drills?

Select this model when you need exactly the three hole sizes — 7/16in, 1/2in and 9/16in — in a single Weldon-shank tool for magnetic drilling.

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