Building a Vacuum. Chuck. Pete Tkacs & John Solberg. The Bruised Brothers

Transcription

1 Building a Vacuum Chuck BY The Bruised Brothers Pete Tkacs & John Solberg

2 Disclaimers We are not experts We have done the research and put together a few systems and finished a few bowl bottoms We are open to any suggestions, comments, or questions (write them on the back of a $20.00 bill and submit them) We don t have all the answers We can not be held responsible for your mistakes or accidents

3 Cautions!! While turning under vacuum Don t turn through your work A severe catch while turning can cause a serious problem Soft or punque wood that will not hold vacuum pressure Thin walls that can collapse under vacuum pressure Porous wood grain can allow air to be drawn in (Oak) A power disruption of the vacuum pump while lathe is running is dangerous - or turning the

4 $370 $85 $65 $600 Gauge Kit Drum Chuck Total Plus fittings $83 E-Z Adaptor Or Rotary Adaptor $80 Pump

5

6 $370 Plus fittings Total $645 Vacuum Gauge kit $85 Holdfast Regulator $25 Vacuum Cylinder $65 Rotary Adapter $100 Pump

7 *** Vacuum Chuck Parts list *** Item Description/ Location Quantity Price Total $ 1 Vacuum Pump 2.65 CFM from Plccenter.com 1 $86.50 $ Vacuum Gauge Surplus Center # $5.95 $ Vacuum Valve Veneer Supplies.com 2 $6.55 $ Exhaust Muffler Veneer Supplies.com 1 $2.75 $ High- flow Filter Veneer Supplies.com 1 $14.95 $ Street Elbow Veneer Supplies.com 2 $1.80 $ " brass Pipe Veneer Supplies.com 1 $0.92 $ Brass Cross Veneer Supplies.com 1 $3.75 $ Pipe Union Lowe's 2 $1.14 $ Brass Barb 1/ 4 Male Veneer Supplies.com 2 $1.55 $3.10 to 3/8 Barb 11 Brass Coupling Veneer Supplies.com 1 $1.15 $ Lock- on Connector Veneer Supplies.com 1 $12.75 $ Lock- on Fitting Veneer Supplies.com 1 $4.85 $ Vacuum Hose 3/ 8" ID - Lowe's by the Ft. 10 $0.60 $ Bearing 1621DCTN Double sealed - Purvis 1 $13.23 $ Lamp Rod 4' with hardware Lowe's 1 $6.75 $6.75 Total ** Not including Tax and shipping ** $ Shipping estimate $17.00 $198.63

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22 Selecting a Vacuum Pump Types of Pumps Diaphragm Pumps Piston Pumps Rotary Vain Pumps Oil Bath Pumps Refrigerant Pumps Venturi Pump

23 Diaphragm Pumps Ideal for vacuum systems Often used in Vacuum clamping Fairly low CFM ratings 1 to 3 CFM Typical Price new is $300 to $400

24 Piston Pump Not as quiet as diaphragm pumps Common in vacuum clamping Better CFM output 2 to 5 CFM Typical Price about $300 to $400 new

25 Rotary Vane Pump Found in most woodturning catalogs Generally maintenance free Good CFM Rating 2 to 20 Typical Will run a long time Tend to get hot with extended usage Price $300 to $400 new

26 Oil Bath Pump Used by the air conditioning industry Can emit a light plume of oil with extended usage CFM range from 1 to 6 CFM typical

27 Refrigerator Pump Very Quiet Very low CFM less than 1 Large and bulky Hard to make connections Need to watch for freon in the system Usually supplied through Scrap

28 Venturi Pump Very low cost Harbor Freight $17.00 Needs a compressor to operate Time consuming to hook up Not portable because of the compressor Relatively low CFM Typically less than 2

29

30

31

32 Vacuum Pressure Guide Inches of Mercury P=πr²*.491*Hg (1 in. Hg = psi at sea level) Bowl Diameter 2 Inch 4 Inch 6 Inch 8 Inch 10 Inch 12 Inch 14 Inch Pounds of Pr essure

33 John Horn Pounds of Pressure Vacuum HG Contact Diameter in inches Vacuum Pressure Guide

34 Vacuum Chuck Resources American Woodturner - Winter 1998; Page 32 to 35 - Vacuum Chucks A turning gizmo you can t afford to ignore. Ken Keougham American Woodturner - Spring 1999; Page 28 to 31 - Vacuum Chucks An efficien tool without sucking up big bucks. Ernie Showalter American Woodturner Summer 1999; Page 26 to 27 Sealing the System O-ring materials improve the vacuum. John Hill Woodturning Magazine No. 170 January 2007 Page 36 to 40 Vacuum Chuck on a budget. Adrian Jacobs Woodturning Magazine No. 171 February 2007 Page 36 to 40 Vacuum Chuck on a budget wwwpart two. Adrian Jacobs Woodturning Design Magazine No. 7 Fall 2005 Page 29 to 35 Vacuum Chucking is the Way to Go How to Create Your Own System at Low Cost. King Heiple A Guide to Work-Holding on the Lathe Fred Holder Page 90 to Building a Vacuum Chuck System for Woodturning. William Nobel March Making a Vacuum Chucking System on a Shoestring Budget an Adventure. Sy Plonski Basics of Vacuum Chucks / Pumps - Bill Hrnjak Setting up a Vacuum Chuck Rex Haslip Vacuum Chuck Richard J. Pagano - Making a vacuum chuck Part 1 & 2 Kurt Hertzog Vacuum Chucking Part I & II February Bruce Gibson and Ralph Tedeschi Vacuum Chucking Lathe Projects with a Vacuum Press. Gast Manufacturing, Inc Vacuum Pressure Systems Handbook