Saw piercing is likely to be among the very first major tasks you try as a jeweller. It is the very first action in the improvement of a simple sheet of metal into something totally various and holds endless possibilities. Although the majority of us are familiar with the concept of sawing wood, many discover metal a little unstable in the beginning, which is why we have actually created this guide. Our goal is to help you with both tools and method, which will, (in addition to some perseverance and practice), start you off on the correct path to successful sawing whenever.
Saw frames: A jewellers saw frame is comparable in design to a little fretsaw and is made of springy steel which holds the blade in position under tension. Blades are kept in place by wing-nut clamps at either end of the saw which are tightened by hand. The size of the saw is determined by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch. A 3 inch frame is a great general function size for small scale projects, however the choice is down to individual preference.
Another decision you require to make when acquiring your frame is whether you want an adjustable or a set design. An adjustable frame permits you to alter the size to accommodate damaged blades where as a set design will just take basic size blades as they are sold.
There have been some new developments in frame design over the past few years and it is now possible to purchase advanced variations which produce the tension in the saw blade for you. One such style is from a company called Knew Concepts who have a range of light-weight aluminium frames which do not flex. Rather the tension is developed by means of a cam-lever system within the blade clamp, which makes it possible for a quick release and positioning of the blade with the flick of a lever. These specific clamps can also be turned 45 degrees which helps with sawing into challenging locations.
Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and be available in a choice of grades which range from very coarse to incredibly great. Blades are defined by the number of teeth per cm so for example the coarsest would be grade 4 which has 15 teeth per cm and the finest is grade 8/0 which has 30 teeth per cm. As a general guideline, the thicker the metal, the coarser the blade you will need to suffice and vice versa. The table listed below contains all the info you will require to pick the appropriate blade for the metal in question:
Saw blade Grade
Blade Thickness mm
Teeth per CM
Drill Size mm
Suggested gauge Of metal mm
Saw blade Grade 5/0
0.4 to 0.55
Saw blade Grade 1/0
0.6 to 0.95
You will not require to purchase every grade of saw blade; a standard selection of coarse, medium and fine should be perfectly appropriate. Ensure you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize most typically.
Saw blade Grade 3/0
0.6 to 0.7
Saw blade Grade 4/0
0.5 to 0.6
Saw blade Grade 2
0.9 to 1.1
Saw blade Grade 4
1.0 to 1.3
Saw blade Grade 6/0
0.35 to 0.5
Saw blade Grade 3
0.9 to 1.2
Saw blade Grade 8/0
Saw blade Grade 1
0.8 to 1.0
Saw blade Grade 2/0
0.6 to 0.8
Installing a blade into a saw:
Sit at your bench with your saw frame supported in between your chest and the edge of the bench or the V of your bench peg. The wooden manage must face you and the blade secures ought to be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and secure completion furthest away into your frame utilizing the wing-nut. (Do not be tempted to tighten up with pliers as this deteriorates the screw thread).
Then push gently versus the handle with your chest which will cause the frame to flex, and tighten the second wing-nut to protect the blade.
Launch the frame and check the stress of the blade by plucking it. (Failure to protect your blade with the right stress will result in it breaking as quickly as you begin to saw).
Once your style is scribed onto the metal, identify a position within the waste product to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the right drill size to correspond with the saw blade you intend to use, (please describe chart) and insert into the chuck making certain it is gripped firmly.
Drill the hole. Start slowly making sure the drill bit has actually found its position. Once in position increase the speed and lower with a gentle however constant pressure until all the way through..
Now, reverse your saw blade at the clamp nearest the handle and thread the blade through the hole from the top. When through, re-clamp your blade ensuring the stress is correct.
Saw out your shape.
Once sawing is complete, get rid of the saw by un-clamping the blade nearest the manage once again.
File to complete.
The drill is getting too hot: If the drill overheats you can cool it down utilizing a little quantity of water or an oil based drilling coolant. Stopping working that, just stop and enable the tools to cool down.
Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a flexible shaft connected to a hand piece, which contains the chuck. It is controlled by a foot pedal and can be utilized with a substantial variety of different accessories including drill bits.
Bench Mounted Pillar Drill: This is the supreme drilling tool and is used for entirely that purpose. A tough base is integrated with a movable chuck installed on a column, which is controlled by a lever at the side. The base can facilitate a clamp to hold work safely assisting to ensure a precise outcome whenever.
Bow drill: A bow drill is a standard hand drill which can be used with one hand. It has a basic twisting system which is produced with a pull/push movement utilizing a wood baton and a piece of string. It is easy to control and is perfect for a newbie.
Why Pierce? Piercing is required when you require access to a location which would otherwise be impossible or difficult to reach e.g. the centre of a circle. By drilling a little hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, enabling you to saw from the within out, instead of the outdoors in.
Archimedian Hand Drill: This is a small spring filled drill, which works using a deal with at the top which is pressed down and drew back approximately rotate the chuck at the pointer. This needs both hands to use effectively.
My arm is hurting: Check your seating position is appropriate and attempt to relax. Likewise dont be tempted to require the saw, you are just guiding it so let the blade will do the work.
My drill isnt cutting: If the drill bit wont bite it might be since it is blunt or that the metal you are using is too difficult for that specific type of drill. Some drills are tougher than others so examine their suitability before you purchase.
Sawing curves: Curves call for much shorter strokes and need an upright sawing position. You require to carefully turn the saw along the curve with each cut, taking care not to require the blade.
The drill keeps moving around and wont find its position: Make sure you have actually marked the drilling position plainly with a tiny damage to assist the drill. Ensure the drill is fitted properly into the chuck, it may not be straight. Above all, make sure the drill itself is totally upright.
Saw frames: A jewellers saw frame is similar in design to a little fretsaw and is made of springy steel which holds the blade in position under tension. There have actually been some brand-new developments in frame style over the past couple of years and it is now possible to acquire more sophisticated variations which create the stress in the saw blade for you. Instead the stress is produced via a cam-lever system within the blade clamp, which makes it possible for a quick release and positioning of the blade with the flick of a lever. Saw blades: Blades for a jewellers piercing saw are offered in packages of 12, or by the gross (144) and come in a choice of grades which vary from extremely coarse to extremely great. By drilling a small hole you offer access to the saw blade which can then be fed through and re-clamped into the frame, permitting you to saw from the inside out, rather than the outside in.
Seat yourself at the bench and hold the operate in position on the bench peg, holding the saw in your opposite hand.
Your saw ought to be kept in a vertical position with the blade dealing with forward, and you ought to be seated so that your working location is around mid-chest height.
Position the blade on the outside of your significant line and carefully draw the blade down. Get rid of the saw and repeat a couple of times till you have a small indent to direct the blade.
Now begin to gently move the saw up and down keeping in mind that the blade cuts on the downward movement and merely re-positions on the upward. If you are having trouble getting the blade to bite you can apply some beeswax which is offered in blocks, to help relieve the movement.
Saw on the exterior of your significant line and attempt to maintain a stable and mild action.
Once the cutting is complete, undo the clamp at the top of the saw and pull the frame to remove it from the work, or merely bring it back along the cutting line if that is possible.
File the rough edge to complete.
Rotary Hand Drill: Rotary hand drills have the motor included within the hand piece and either run off of the power supply or can be charged up to utilize cordless. They have the very same multi-purpose performance of a pendant drill and can be used with a large variety of devices. Rotary hand drills can be utilized in combination with a drill stand to make sure vertical drilling.
Centre punch: A centre punch is likewise a steel marker with a sharp point comparable to a scriber. It has a shallow suggestion and is utilized in combination with a hammer to mark the position for subsequent drill holes. It is also possible to get automatic centre punches which do not need a hammer and rather have a push button action.
Sawing straight lines: Straight lines are best taken on with the saw slanted a little forward using long, smooth strokes.
My saw blades keep sticking: Apply some kind of lube to ease the sawing movement. Some jewellers utilize spittle, but you can also use beeswax. Simply run it along the blade and continue to saw.
Tools for Piercing: There are several ways to drill a hole. You can utilize hand tools or mechanised tools; the concept is similar. The most essential thing to keep in mind when drilling a hole is to keep your drill bit entirely vertical and upright. This is why all drilling tools have an adjustable chuck to grip the drill bit tightly, whilst keeping it totally vertical. Chucks are either completely adjustable to take all sizes of drill or interchangeable, suggesting you will require to alternate to accommodate various drill bits.
My saw blades keep breaking: Dont anguish this is completely typical and practise makes perfect. However, check the tension of your blade for slackness and make sure you are utilizing the proper blade size/metal mix.
Piercing an access hole for sawing:.
Scriber: A scriber is a great marking tool with a narrow and long idea. It is used to scribe styles onto metal and can be utilized to mark the positions for drilling.
Beginning to Saw:.
Drill bits: The most common type of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a variety of toughened materials and range in size from 0.3 mm upwards. Drills can end up being blunt remarkably rapidly so its advisable to buy multiples of the sizes you utilize most often.
Marking out and measuring: Before beginning to saw, your metal needs to be plainly significant and measured so you have a guide to work to. Lines can be scribed onto metal utilizing a scriber or a set of dividers (which are similar to a compass but with two points).
My drills keep breaking: A blunt drill bit will break more quickly, as we intuitively apply more pressure if it does not appear to be cutting. They are also susceptible to damages if not secured correctly in the chuck.
Conserve this for later on.