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19

10.6.3

  Wood Selection 

Firewood is the cheapest, most widely available 
stock to use while learning to turn bowls. Simply 
waste wood for a while practicing turning 
techniques. Develop skill with each tool before 
attempting to make a finished piece. It is best to 
start with dry wood, without worrying about drying 
or distortion. Once turning becomes comfortable, 
try green wood which cuts very easily. As the 
turner gains experience, he or she will find 
extraordinary grain and figure in the form of burls, 
crotches and bark inclusions. 

10.6.4

  Checks and Cracks 

Green wood will check and crack. For best results, 
leave logs in as long a length as you can handle. 
As the material starts to dry, surface cracks will 
develop on the ends of the log. Cut off two to three 
inches and you should find good, sound wood. 
Also cut the log in half along the pith to avoid 
having it in the finished piece.  Most checks radiate 
from the pith.  

As you turn bowls from green wood, make sure 
you maintain a consistent wall thickness 
throughout the piece. Leaving a piece thick in 
some areas and thin in others will cause the wood 
to dry unevenly and promote checks and cracks. 

10.6.5

  Distortion 

Distortion is a problem associated with turning 
green wood. It will vary from one type of wood to 
the next. Typically, fruitwoods tend to distort more 
than others. It also varies with the time of year the 
tree was cut and how the logs are stored. 

10.6.6

  Tools for Bowl Turning 

The deep fluted bowl gouge is the most essential 
and versatile tool for most bowl and plate turning. 
The bowl gouge is heavier and easier to control 
than other types of gouges. It also allows removal 
of wood much faster and with less vibration than 
other gouges. Most average sized bowl work can 
be accomplished with a 3/8" or 1/2" bowl gouge.  

A 1/4" bowl gouge is best suited for smaller bowls 
and light finishing cuts. Larger 3/4" and 1" bowl 
gouges are only used for extremely large pieces. 

Large domed scrapers can also be used to help 
clean up the interior surfaces of bowls. A light 
touch with the scraper slightly tilted will eliminate 
some of the ridges occasionally left by an 
inexperienced bowl gouge. 

10.7

  Bowl Turning Techniques 

10.7.1

  To Shape Outside of Bowl 

1.  Odd shaped burls, crotches and other irregular 

shaped blanks require special preparation 
before mounting in a chuck or onto a 
faceplate. Remove the bark, if there is any, 

from what appears to be the center of the top 
of the workpiece. 

2.  Drive spur center into the top of the workpiece 

with a mallet or dead blow hammer. 

3.  Slip the spur center into the headstock taper 

and bring the tailstock with a live or ball 
bearing center into position. Lock the tailstock 
to the bed and advance the tailstock spindle in 
order to seat the cup center into the 
workpiece. Tighten the ram locking handle. 

4.  Turn workpiece by hand to ensure proper 

clearance. 

5.  Start lathe at lowest speed and bring it up to 

the maximum safe speed for the size of work 
to be turned. If the machine starts to vibrate, 
lower the speed until vibration stops. 

6.  Rough out the outside of the bowl with the 1/2" 

deep fluted bowl gouge, holding the handle of 
the tool firmly against your hip. For best 
control, use your whole body to move the 
gouge through the workpiece. 

7.  As the bowl takes shape, work on the bottom 

(tailstock end) to accommodate attaching a 
face plate. 

8.  Turn a short tenon (about 1/8" long) the size of 

the hole in the faceplate. See Figure 30. This 
will allow centering the workpiece when the 
faceplate is attached. 

 (NOTE: If you plan to use a chuck, turn a 
tenon of the appropriate length and diameter 
to fit your chuck.) 

9.  Stop the lathe, remove workpiece and attach 

face plate or chuck (

see section 10.6.1 

"Mounting Stock"

). 

 

The surfaces of faceplate 

and workpiece should mount flush to each 
other.

 

10.  Finish turning the outside of bowl with 1/2" or 

3/8" bowl gouge. Leave additional material at 
base of bowl for support while turning interior. 
This will be removed later. 

 

Figure 30 

Содержание JWL-1440VS

Страница 1: ...nual 14 x 40 Woodturning Lathe Model JWL 1440VS JET 427 New Sanford Road LaVergne Tennessee 37086 Part No M 719400 Ph 800 274 6848 Revision C 11 2014 www jettools com Copyright 2014 JET Shown with opt...

Страница 2: ...rvice Centers located throughout the United States For the name of an Authorized Service Center in your area call 1 800 274 6846 or use the Service Center Locator on the JET website More Information J...

Страница 3: ...te Installing removing 13 8 13 Checking center alignment 14 9 0 Operating controls 14 10 0 Operation 14 10 1 Inspection 14 10 2 Turning Tools 15 10 3 Spindle Turning 15 10 4 Stock Selection 16 10 5 Cu...

Страница 4: ...serious injury 17 Some dust created by power sanding sawing grinding drilling and other construction activities contain chemicals known to cause cancer birth defects or other reproductive harm Some e...

Страница 5: ...or possible machine damage This means that if precautions are not heeded it may result in serious or possibly even fatal injury 4 0 About this manual This manual is provided by JET covering the safe o...

Страница 6: ...national electrical codes Capacities Working distance between centers 40 1016mm Working distance between centers optional 20 bed ext mounted 60 3 4 1543mm Maximum distance between spindle face and ta...

Страница 7: ...nsions assembled with Legs 74 L x 18 W x 49 H 1880 mm x 458mm x 1244mm Overall dimensions assembled without Legs 74 L x 18 W x 18 26 H 1880 mm x 458mm x 464mm Bed Extension length optional accessory 2...

Страница 8: ...ome parts may have been pre installed If you did not purchase the leg set and are mounting the lathe to a bench or table continue with section 6 3 If you purchased the leg set skip to section 6 4 6 3...

Страница 9: ...lower holes allows use of the tool support during outboard turning 1 Slide tailstock away from edge of bed 2 Have an assistant hold bed extension flush to end of lathe bed and insert four 3 8 socket...

Страница 10: ...s are not completely understood or if in doubt as to whether the tool is properly grounded Failure to comply may cause serious or fatal injury Use only 3 wire extension cords that have 3 prong groundi...

Страница 11: ...Push handle A Figure 9 toward motor to unlock Headstock will slide freely along the length of the bed Retighten handle before operating lathe 8 2 Headstock rotation 1 Loosen handle A Figure 9 2 Unscr...

Страница 12: ...le H Figure 12 to raise or lower tool rest and angle it to the work Tighten handle before operating lathe Figure 12 8 6 Tool rest extension The extension J Figure 13 mounts to the tool rest base and o...

Страница 13: ...connect lathe from power source 2 Clean the tapered end of the center and the inside of the tailstock quill then push the center into the quill Test the insertion by attempting to pull the center out...

Страница 14: ...er minute in the adjoining window C Do not start lathe at maximum speed when a workpiece is mounted in the lathe Start at lower speed and gradually increase to desired speed Figure 20 The JWL 1440VS c...

Страница 15: ...r sizing For safety and best performance keep tools sharp If a tool stops cutting or requires excessive pressure to make a cut it needs to be sharpened A number of brand name sharpening jigs and fixtu...

Страница 16: ...ile it is mounted in the Lathe spindle 4 Make sure headstock is locked to lathe bed 5 Clean tapered end of spur center and inside of headstock spindle 6 Insert tapered end of spur center with the atta...

Страница 17: ...th Place the parting tool on the tool support and move tool forward to make the full bevel of the tool come into contact with the workpiece Gently raise handle to make cut to the appropriate depth 2 R...

Страница 18: ...argest diameter face plate that can be used for the workpiece to be turned 3 True one surface of the workpiece for mounting against the face plate 4 Using the face plate as a template mark the locatio...

Страница 19: ...bowl gouges are only used for extremely large pieces Large domed scrapers can also be used to help clean up the interior surfaces of bowls A light touch with the scraper slightly tilted will eliminat...

Страница 20: ...wall thickness at the rim and maintain it as you work deeper into the bowl Once the piece is thin toward the bottom you cannot make it thinner at the rim When the interior is finished move the tool s...

Страница 21: ...and chips from accumulating on belts and sheaves Also blow off debris that accumulates in the motor fan Frequently clean out the morse tapers on both headstock and tailstock Commercially available tap...

Страница 22: ...Replace spindle bearings Worn drive belt Replace drive belt Motor mount bolts are loose Tighten bolts Lathe on uneven surface Adjust leveling feet Tools tend to grab or dig in Dull tools Keep tools sh...

Страница 23: ...ameter of workpiece Diameter of Work Roughing RPM General Cutting RPM Finishing RPM Under 2 1520 3000 3000 2 to 4 760 1600 2290 4 to 6 510 1080 1500 6 to 8 380 810 1125 8 to 10 300 650 900 10 to 12 25...

Страница 24: ...mbination A 5 this will be followed by A 9 Succeeding flutes will be made with the index pin in the B position B 3 B 7 and so on No of Flutes 360 divided by Angle Letter Letter Letter 1 360 00 A 1 2 1...

Страница 25: ...parts or reach our service department call 1 800 274 6848 Monday through Friday 8 00 a m to 5 00 p m CST Having the Model Number and Serial Number of your machine available when you call will allow us...

Страница 26: ...21 Worm 1 26 JW1440 126 Control Panel 1 27 TS 081C052 Pan Head Screw 10 24 x 3 4 4 28 JWL1442 118 Switch 1 29 JWL1440 129 Pivot Pin Assembly includes 72 thru 77 1 30 JWL1442 127 Bushing 1 31 JWL1442 1...

Страница 27: ...8071 Socket Head Cap Screw 5 16 18 x 1 1 4 2 65 JWL1440 165 Motor Cord 1 71 JWL1440 171 Key 1 72 JWL1440 172 Pivot Index Pin 1 73 JWL1442 175 Spring 1 74 JWL1442 176 Index Bushing 1 75 JWL1442 173 Ind...

Страница 28: ...28 16 2 1 JWL 1440VS Bed Assembly Exploded View...

Страница 29: ...nt for Live Center 1 16 JML 52 Live Center Head 1 17 BB 6002ZZ Ball Bearing 6002ZZ 1 18 JML 54 Live Center Shaft 1 JWL1440 TA Tailstock Assembly includes 19 thru 30 38 39 1 19 JWL1440 219 Quill MT 2 1...

Страница 30: ...tion Size Qty 719402 JWL 1440VS Leg Set includes 1 thru 6 1 1 JWL1440 401 Leg 2 2 TS 0208071 Socket Head Cap Screw 5 16 18x1 1 4 8 3 TS 0720081 Lock Washer 5 16 8 4 TS 0680031 Flat Washer 5 16 8 5 JWL...

Страница 31: ...PTIONAL Parts List Index No Part No Description Size Qty 719401 20 Extension Bed w Post includes 1 thru 6 1 1 JWL1440 301 Extension Bed 20 1 2 TS 0209071 Socket Head Cap Screw 3 8 16x1 1 2 4 3 TS 0720...

Страница 32: ...32 17 0 Electrical Connections...

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