Tag Archives: tools

Tool of the Month – Pump Drill

Pump Drill

I was all set this month to write about what I was taught is called an Archimedes drill. While researching it online, I discovered that this tool is actually called a pump drill and an Archimedes drill is something different! So, no interesting information on Archimedes to be found here today. He was pretty amazing, though, worth researching if you can find the time.

Pump Drill

The pump drill is composed of a long drill shaft with a collet on one end, a handle with a hole through the centre, a weighted flywheel, and a length of cord. The flywheel is attached near the bottom of the shaft and the handle slides over the top. The cord is run through a hole near the top of the shaft and affixed to either end of the handle so that it hangs just above the flywheel. To use it, the correct size drill bit is inserted in the collet, one hand is placed on the handle while the other hand turns the shaft to wind the cord around its length, raising the handle near to the top of the shaft, where the cord becomes tight. Holding the drill upright and placing the drill tip against the material to be drilled, a smooth downward pressure is exerted on the handle causing the drill to rapidly spin. Once the bottom is reached, the weight is relieved and the drill allowed to rebound re-winding the cord around the shaft and the process is repeated. It is a simple concept but a skill that takes practice to master.

Ruby Ring - Raw Ruby and Sterling Silver Cocktail Ring

The pump drill is a variation of the bow drill, which has been in use for at least seven thousand years. As well as drilling holes, the bow drill can be used to start a fire using friction. My occasionally burnt fingers can attest to the heat that can be generated by a drill spinning – silver is a great conductor of heat, and I have not only heated my fingers but made burn marks in my bench peg by drilling a piece of silver before now! As well as my pump drill, I sometimes use my flex-drive with a drill bit attached for drilling holes – there is something far more satisfying about using the lovely, simple, ancient pump drill though!

Tool of the Month – Mandrels

Mandrels

Mandrels are tapered steel rods, which come in various shapes and sizes. I have three round ones, which go from a millimetre or so up to maybe 40mm in diameter.

Mandrel

Using either my wooden mallet, which will reshape silver but not stretch or resize it, or my bench hammer, which will both shape and stretch the silver to a different size, I use my mandrels to shape bezels, shanks and various other things as I am creating a piece. I even bend my round hoop earrings on my mandrel!

Mandrel

You can get oval mandrels, square mandrels, teardrop shaped mandrels, hexagonal mandrels.. I do have another one or two on my wish list, but for now I love my round mandrels!

Mandrel Uses

 

Tool of the Month – Hammers

Jeweller's Hammers

The humble hammer. I used to think a hammer was just a hammer, right? But no! There are many different sorts of hammers, with many different purposes. I have a small collection, and I use at least one with just about every piece that I create.

Claw Hammer

First up, the claw hammer. Great for hammering in and pulling out nails in the carpentry world. I use mine for heavy hammering, such as stamping pieces with my maker’s mark and 925 stamp, or hitting the ends of my doming punches.

Jeweller's bench hammer

Next, my jeweller’s bench hammer. This baby has a flat face and a cross pein. (The pein is the ‘other’ end of the hammer). Great for such things as using with my bench block to harden earring hooks, and with my mandrels to straighten and stretch rings. The pein end is useful for things like curving silver in my swage block for rings like this cuff ring. (Don’t worry, posts on all those other weird tools will be along sooner or later! 🙂 )

Wooden Mallet

Thirdly, my wooden mallet. Great for shaping silver without making it thinner – rounding a ring on my mandrel without making it larger, for instance. (Has not been used as a judge’s gavel -yet!!)

Chasing Hammer

Finally, my favourite hammer, my chasing hammer. This baby is great for setting gemstones, using my engraving ball and a setting punch. (Yep, more on those at a later date, too!!) The handle thins dramatically towards the head of the hammer, making it very whippy and easy on the wrist, which is a nice thing when it can take up to an hour’s hammering to set a stone.

There are lots more jewellery hammers, used for various things like forming, planishing, rivetting etc. These four are the tip of the iceberg.. but they are all I need at the moment for all of my creations. A simple everyday tool, the hammer; but indispensable in the jeweller’s studio!

Tool of the Month – Jeweller’s Saw

There are many pieces of equipment that are essential to the creative silversmithing process, and one that gets used in practically every piece is the jeweller’s saw. From cutting through fine chain links, to carving out an entire pendant, the saw is a very useful piece of equipment!

Jeweller's Saw

One of the first things I learned when I started smithing was how to saw – first straight lines, then curves, then around corners. There is an art to sawing! Jeweller’s saw blades come in many sizes, the tooth count varying depending on the job you need to do.

Sawing with Jeweller's Saw

Saw blades are replaced when they become blunt or more often when they break – which happens all the time. Inserting the blade correctly, holding the saw upright, not applying pressure and letting the blade do the work will all help. “Doh! Another one!” is still a frequent cry around the workshop though!

Replacing saw blade

Saws can also be used for piercing.  First a small hole is drilled, the saw blade is fed through the hole, and then tightened into the saw.

Art Nouveau Inspired Silver Earrings

I have two saws, my old faithful that I’ve had from day one and my newer Green Lion Studios saw, which has a deeper frame and can be used for larger cuts. I have different sizes of sawblades in each one, and they are both some of my favourite tools!