Tyme Avon

Tyme Avon

MachineInfoBox Tyme Avon ATL301
Type:	Wood Lathe
Material:	woodturning blanks
Used with:	face shield, woodturning tools
Location:	woodturning area
Access Requirements:	Woodturning Introduction
Status:	[[Has InfoBox Status::accessories need documentation]]
Tutors:	Lukas

The Tyme Avon is an old, but solidly built lathe that has replaced our flimsy Güde 1000.

Specs

We seem to have the Model ATL301 with 36" (915 mm) between centers and a bed length of 52" (1320 mm).

• max. workpiece diameter (above bed): 280 mm (11")
  • max. workpiece diameter (swiveled 90°): 495 mm (19.5")
  • max. workpiece diameter (swiveled 180°): 610 mm (24")
• max. workpiece length: 900 mm
• spindle speeds: 470 - 750 - 1150 - 2000 rpm
• motor: 550 W (3/4 hp)
• spindle thread: M25 × 2 mm; internal No. 2 morse taper (MK2)
• workholding options:
  • headstock: drive center, faceplate, four-jaw chuck, ...
  • tailstock: No. 2 morse taper (MK2) - accessories: rotating centers, our "usual" drill chucks also fit

Speed Selection

The lathe can run at various speeds depending on which pulleys are connected by the belt:

spindle speeds resulting from each belt position

Do not put excessive tension on the belt - you'll be very happy about the belt slipping in case you've made a mistake and the tool digs into the workpiece!

New belts are still sold at store.lathes.co.uk

Accessoires

• 

  An alternative tool rest for our Tyme Avon

• 

  We have two barrels which can be used with the Tyme Avon - we are usually using the right one, since it spins with the workpiece.

Precision Combination Chuck

AccessoryInfoBox Precision Combination Chuck
Used with:	Tyme Avon wood lathe
Location:	woodturning area
Access Requirements:	read this page & manual
Manual:	Drechslerforum
Similar (More or Less):	four-jaw chucks, faceplates

The "precision combination chuck" is a flexible chuck which can be used with our wood lathe and relatively small workpieces ^{[citation needed]}. Our manual says "Craft Supplies Ltd." but it seems to be identical to a Robert Sorby product.

It provides several modes:

• Expanding dovetail collets
• 3-way split rings
• Pin chucks
• Collar chuck
• Cup chuck
• Screw chucks
• Spigot/collet chuck
• Adjustable collet chucks
• three- & four-jaw chucks
• Faceplate rings

Please see the manual for further information and help us by adding workpiece size ranges to the list above!

Four-Jaw-Chucks

AccessoryInfoBox Four-Jaw Chucks
Synonyms:	four-jaw scroll chucks; DE: Vierbackenfutter
Type:	workholding (woodturning)
Material:	wood
Used with:	Tyme Avon or Holzmann D 460F wood lathes; (optional) dovetail scraper
Location:	woodturning area
Access Requirements:	read this page & manuals where available
Tutors:	Lukas
Manual:	see list
Similar (More or Less):	three-jaw chucks, precision combination chuck, faceplates

Four-jaw chucks are a very nice workholding option for woodturning projects that can't be held between centers (e.g. bowls).

They do not automatically center a workpiece like three-jaw chucks you may know from metal turning, but have other advantages to work especially well with wood.

The chucks come with different jaw sets (Spannbacken) for different diameters. Take care to put them in the correct order - most jaws will be numbered and only close in a neat point or square if you match them with the proper spot on the chuck.

You usually don't use the "pointy" base jaws to directly hold a woodturning blank because they dent the wood! Instead, in the first step a recess or tenon (Zapfen) with the exact jaw diameter (and often a dovetail profile) is turned with other workholding options and the workpiece is then flipped around to be held by the chuck.

• 

  four-jaw chuck (SuperNova²) with two very different jaw sets

• 

  four-jaw chuck without any jaws on the jaw slides (for small pieces that fit through the center bore)

• 

  four-jaw chuck holding a workpiece

Precision

The holding force is best when the jaw diameter (and shape) matches the workpiece precisely as specified in the manual (e.g. SuperNova²: 6 mm larger/smaller than the jaw diameter when fully closed/opened). Reportedly, it can be improved further by tightening both chuck screws, not just one. ^{HolzWerken 99}

We could make laser cut templates for the various jaw sets' ideal diameters!

Turning green wood can be an exception to this rule: keeping in mind shrinkage, you may want to oversize your tenon during the first round of rough turning so you can cut it to the proper size when you finish the piece. ^[1]

Available Chuck/Jaw Combinations

The chucks are screwed onto a wood lathe's spindle screw, so they are somewhat machine specific based on the thread.

Photo	Chuck	Jaw Set	Manual	Workpiece (OD)	Workpiece (ID)	Thread	Lathe(s)	Adjustment Tools	Further Parts/Notes
	SuperNova²	50 mm dovetail (standard)	teknatool.com	45-65 mm (ideal: 50 mm)	50-75 mm (ideal: 67 mm)	M25 × 2 mm with adapter (native: M33 × 3.5 mm)	Tyme Avon	4 & 8 mm hex keys	"Woodworm" screw for fast mounting of rough material
	SuperNova²	Cole jaws	teknatool.com - page 40	56-236 mm	nope	M25 × 2 mm with adapter (native: M33 × 3.5 mm)	Tyme Avon	9 mm slot screwdriver	8 rubber buffers - required!
	noName (CoMS 051)	80(?) mm dovetail		47-77 mm (?)	63-95 mm (?)	M33 × 3.5 mm	Holzmann D 460F	4 & 10 mm hex keys	24 step indexing plate (attached)
	noName	80(?) mm stepped/"pointy"		5-53 mm (?)	63-95 mm (?)	M33 × 3.5 mm	Holzmann D 460F	8 mm round steel handles	jaw numbers pointing outward have to match the base numbers

Helpful Videos

• wortheffort: Woodturning Chucks, Jaws, Tenons and Recesses - detailed explanations (36 min) of hardware and strategies to maintain the strength of the wood
• Mike Waldt: Woodturning - How to Hold Work Securely in a Chuck - short demonstration (10 min) of proper tenon/recess diameters
• Woodworker's Journal: Scroll Chuck Basics - rough overview (4 min) of the chuck's operation

• Maschinenhandel Meyer: Gefährlich und ungenau - welches Drechselfutter eignet sich zum Drechseln...und welches nicht! - (DE) Kaufberatung mit vielen wichtigen allgemein gültigen Punkten