Basic Turning Tools

Wednesday 22 April 2009

Nick Arnull looks at the basic yet essential woodturning tools every wordshop needs

1.The 6 basic tools

Buying your first set of woodturning tools can be confusing - there is so much choice and it is difficult to know where to start. I would always advise a beginner to seek advice from a recognised professional before they consult any other source. Many people think that the Internet is a good place to start, but I would always suggest asking a professional over this method.

Woodturning tools today are generally made from High Speed Steel (HSS) but there are also a myriad of flute shapes, gouges and terminology which can lead to further confusion for new woodturners. Words such as super flute, swept back grind, radius edge, diamond or swan neck, can all seem like a foreign language to the amateur turner and can mean very little if not explained properly. This helpful guide aims to dispel common myths and shows you what basic turning tools you need to have in your workshop.

Buy quality from the start

Generally, avoid tools that are modern in their design and instead stick to traditional and trusted patterns. Buy good quality tools from the beginning, as cheap un-branded tools can prove false economy and cheaply-produced tools can limit your technique. Cheaply manufactured tools are often made with odd-shaped flutes which are often too flat or narrow and can lead to problems with sharpening or even turning. If you are having problems with your

tools, speak to a professional/experienced turner to ensure that these pitfalls are avoided.

Once you have purchased your turning tools do not assume that they have the correct bevel angle or style of grind required by modern turners; they may require re-grinding a number of times before they feel right to use. Box-sets can often include tools not entirely appropriate and many basic tools are often supplied with shortened bowl gouges or handles to enable them to fit in the packaging, which can compromise their usefulness.

Straight from the box

Once purchased, new tools may not immediately be ready to use as they may well have been damaged in transit from the manufacturer or not be sharpened ready for use. Many turners, depending on personal choice, may use different grinds and the same applies to handle length.

Initially, keep things simple and follow some basic angles, but remember it will take some time to become proficient with grinding and sharpening. (We will discuss sharpening and how to use the tools in futre articles in the series).

The 6 basic tools

1. 20mm (3/4in) spindle roughing gouge

2. 25mm (1in) skew chisel (flat section)

3. 8mm (1/4in) parting tool

4. 10mm (3/8in) spindle gouge

5. 10mm (3/8in) square ground bowl gouge

6. Heavy duty French-curved scraper

Spindle roughing gouge

This tool is used to rapidly remove waste timber on spindles (timber where the grain runs parralel to the axis of the lathe bed). It can be used to removed square edges to make the timber round or to create gentle curves. Although this tool is often supplied in a form that is ready to use, it will require sharpening beforehand. A good starting size to choose is 19mm (3/4in).

Skew chisel

This is probably the most versatile tool available to woodturners, but is often misunderstood. it is effectievly the plane of the woodturner's tool kit. Often called troublesome, a little effort learning how to use it will show it is capable of smoothing cuts, cutting beads, fillets, long convex and concave curves, shallow and deep V-cuts, plus many more. This tool is so versatile, it is often used as a benchmark for an individual's skill.

From the manufacturer, the bevel angle may be too long to use immediately. Before using, ensure the skew is ground correctly to somewhere between 25 degrees and 30 degrees, see the illustrations at the side. The skew is also sommetimes use on its side - in scraping mode - to cut dovetails for spigots and recesses. Although not strictly correct it is effective. 19 or 25mm wide (3/4 or 1in) are good starting starting sizes to choose.

Parting Tool

In its simplest form, this tool will allow you to part a piece of wood in two. However, it is also capable of delivering much more than just this one action and learning the range of cuts available will allow you to make sizing cuts for spigots and fillets on spindles - it will even turn beads if required. Supplied direct from the manufacturer, the tool is generally fit for initial use, but ensure basic sharpening is carried out beforehand. 3 or 6mm thick (1/8 - 1/4in) are good sizes to work with.

Spindle gouge

This tool is also commonly referred to as a shallow-fluted gouge or sometimes, if the flute is very shallow, a detail gouge. It is most widely used for refining a shape and creating beads and coves, ogees, etc, on spindle work. No spindle turner should be without one. For optimal use and control the tool requires grinding to a 30-40 degrees bevel angle with the wings ground slightly back, known as a lady finger or fingernail grind. The illustration shows the fingernail profile as seen from above. A typical versatile starting size is 9mm (3/8in).

Bowl gouge

This is an essential tool if you wish to turn bowls. This tool is often referred to as long and strong or deep-fluted gouge, is stronger and longer than a spindle gouge and is capable of taking heavy or fine cuts, as necessary. The bevel angle can be ground from 40-80 degrees depending on where it is required to cut, but a good starting grind angle is 45 degrees, as shown in the illustration.

This tool is not limited to use on bowls, it can also be used on spindle work. A 10mm (3/8in) gouge is recommended to start with.

French curve bowl scraper

This is a one-sided scraper used for finishing cuts inside bowls and other curved forms. You will find that just the lightest touch is required to achieve the best results. Generally, novice turners feel this tool can be used to shape and remove large amounts of wood from the bowl, but this is ill advice. Delicate refining cuts are the key. Supplied straight from the manufacturer, the scraper can often be used directly after sharpening. A 19-25mm (3/4 -1in) scraper is an ideal starting size.

Glossary Rollover a term to view its definition

  • Bowl Gouge
     

    Bowl Gouge

    Bowl Gouge

    A cutting tool with a deep flute and a heavy cross-section. These are normally made from round bars and the flute is milled out. The round bar fits into the handle thus giving the tool a great deal of strength to enable it to overhang the toolrest a long way in order to hollow out deep bowls. Its primary function is for faceplate - or bowl turning - but it can also be used in spindle work. The bevel angle is ground to suit the user but is anything between 40 degrees and 80 degrees. Traditionally, bowl gouges are ground straight across, but many turners prefer to grind the wings back. There are many terms for a swept back bowl gouge - fingernail grind, O'Donnell grind, Irish grind, Ellsworth grind, lady's finger - to name a few. There may be subtle differences in these grinds, but generically they are all bowl gouge grinds where the wings have been ground back.

     
  • Parting Tool
     

    Parting Tool

    Parting Tool

    As the picture shows, there are several different types of parting tool - three of which are shown here. On the left is a narrow (3mm) parting tool which is very useful when parting work where the least amount of grain mismatch is desirable, for example when parting the lid from the base in box making. The middle tool is a straight sided, standard parting tool and the one on the right is a diamond parting tool where the widest part of the tool is at the cutting edge. This can be advantageous when cutting deep grooves because it means less of the tool is rubbing on the sides of the groove. Parting tools primary task is to part wood off in spindle work but they are also used to cut tenons or spigots and grooves. They can also be used to cut beads.

     
  • Scraper
     

    Scraper

    Scraper

    As its name suggests, scrapers scrape the wood rather than cut it and generally leave a poorer surface finish on the wood than cutting tools. Unlike cutting tools, do not use the bevel rubbing technique with a scraper. In fact the 'bevel' is really a clearance rake and allows the cutting edge to come to a sharper edge. Sharpen or hone it often and take very light cuts with a scraper. You should get shavings; if you are only getting dust, resharpen it. Scrapers come in all shapes and sizes - square edge, round nosed, French curve, box scrapers and hardwood scrapers. The picture shows a 1/2 inch round nosed scraper.

     
  • Skew Chisel
     

    Skew Chisel

    Skew Chisel

    An extremely useful tool but has a reputation for being difficult to control. Certainly you can get some nasty catches with it but it is worth mastering. It is used mainly in spindle work and produces a very fine finish from the tool, requiring little, if any sanding. Planing cuts, peeling cuts and slicing cuts can be made with the skew as well as turning beads, coves and 'V' cuts. Typically, the cutting edge is ground at 60 degrees to the axis of the tool - hence the term 'skew' and the tool has two bevels whose inclusive angle is anywhere between 25 and 45 degrees. Skews are now made in three styles - rectangular section, oval section and rolled edge section.

     
  • Spindle Gouge
     

    Spindle Gouge

    Spindle Gouge

    Modern day spindle gouges are made in the same way as bowl gouges - from a round bar of M2 high speed steel with the flute milled out. The flute is shallower and more open than that of a bowl gouge. Traditionally spindles gouges were forged from a flat, rectangular sectioned bar and some manufacturers have started making a modern day version of this, commonly known as the Continental Style spindle gouge. Like their name suggests, spindle gouges are used to cut details such as beads, coves and fillets on spindle work.

     
  • Spindle Roughing Gouge
     

    Spindle Roughing Gouge

    Spindle Roughing Gouge

    This gouge is semicircular in section and the bevel is ground at between 35 and 45 degrees. The cutting edge is usually ground straight across. It is normally used in spindle or between centres turning for reducing a square blank to a round section - known as roughing down. This gouge is commonly known as a roughing gouge, but is more accurately described as a Spindle Roughing Gouge as it must not be used on faceplate work, e.g. for turning bowls.

     

Nick Arnull using a bowl gouge to turn a bowl

Diagrams Click an image to enlarge

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