This project was built and designed by Rob from Let’s Make Things. It’s a smart and practical jig that helps you drill perfectly straight holes with a handheld drill, replicating the precision of a drill press without the size or limitations.
Rob’s jig solves a common workshop problem—how to drill 90° holes in large or awkward pieces that can’t fit under a drill press. With a combination of steel, wood, and careful shaping, this tool offers reliability and control for any drilling task.
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Why Straight Holes Are Critical
Accurate, straight holes are essential in woodworking and DIY projects. Crooked holes can cause alignment issues, weaken joints, and complicate assembly.
This jig makes it easier to maintain perpendicular alignment, especially when using a handheld drill. By stabilizing the bit and reducing the chance of tilting, the jig helps create clean, repeatable results.
Limitations of Traditional Jigs
Many existing jigs use V-blocks or plastic guides, but these often wear out quickly or only accommodate limited drill bit sizes. Others can be hard to hold steady or awkward to use.
Rob’s design addresses those flaws with a steel angle for durability, a customizable wooden base for comfort, and a mounted handle for improved grip and control. The result is a jig that performs reliably and fits a wide variety of drill bits.
Materials and Basic Design
The jig is made from three main components:
- A wooden block (often cut from a 2×4) serves as the base.
- A piece of hardened steel, ideally from square tubing, forms the 90° guide.
- A handle is mounted at an ergonomic angle for better control.
The steel angle is the key element, offering a sharp and accurate edge that doesn’t round off like brackets from big box stores. Rob emphasizes using hardened steel for longevity, especially when working with smaller bits that may cause wear faster.
Shaping the Wooden Block
Rob starts by shaping the block to hold both the steel and the handle. A slope is cut into the top surface to mount the handle at a more natural angle, which reduces fatigue and improves stability during use.
This shaping can be done on a bandsaw or with other cutting tools, but accuracy is important. Rob checks that his bandsaw blade is square to the table before making the cuts to ensure the jig stays true when in use.
Attaching the Steel Guide
Once the block is shaped, the steel angle is cut to length. Rob attaches it to the block using epoxy, making sure it sits flush and square to maintain the jig’s 90° drilling angle.
The jig is clamped during curing to keep everything aligned. This creates a strong bond and ensures the steel doesn’t shift during drilling.
Installing the Handle
A handle is added to the sloped top of the block using wood screws. Rob chooses a comfortable, store-bought handle, but the design allows for customization based on hand size or user preference.
The angled position of the handle makes the jig easier to hold steady while drilling, reducing the chances of slipping or tilting the bit.
How to Use the Jig
To use the jig, place it on the surface where you want to drill. Mark the hole location, align the jig’s guide with that mark, and insert your drill bit.
With the handle held firmly and the bit kept square by the steel guide, you can drill through the material with confidence. This is especially helpful on pieces that are too large or awkward for a standard drill press setup.
Advantages in the Shop
This jig offers several benefits:
- Versatility: Works with a wide range of drill bit sizes.
- Durability: The hardened steel guide lasts longer than plastic or soft metal alternatives.
- Control: The handle and weight of the jig keep it stable during use.
- Accessibility: Great for large workpieces, irregular shapes, or mobile jobs where a drill press isn’t available.
It also works well for materials beyond wood, making it useful in metalworking or multi-material projects.
Tips for Better Results
Rob recommends using hardwood or dense softwood for the block to improve the jig’s durability. Checking the steel guide for wear over time helps maintain accuracy.
Choosing a comfortable handle and keeping the guide hole clean will extend the jig’s lifespan and make each use more efficient. And if the steel ever wears out, it can be replaced easily.
A Simple Jig That Solves a Real Problem
This hand drill jig is a straightforward but powerful tool for makers who value precision. It’s a practical project that can be completed quickly but provides long-term value in the shop.
Whether you’re working on furniture, DIY repairs, or other custom builds, this jig helps ensure your holes are always clean, accurate, and square.
Get Rob’s plans here: https://makethingswithrob.com/hand-drill-jig/.