1. Marty Schlosser & Philip Dube
Wood Dust & Chips
Management
Marty Schlosser & Philip Dube

2. Overview - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
- Bringing it All Together
- Q&A

3. References Bill Pentz: “Dust Control Made Simple” by
“Dust Control Made Simple” by
Sandor Nagyszalanczy
Marty’s Article on Cyclone DC for Small Shop:
s/cyclone-dust-collection-small-shop

4. Overview - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
- Bringing it All Together
- Q&A

5. Importance
Wood dust (.5 – 2.5 microns) & Chips are a health & safety hazard
Workplace Exposure Limits:
.1 milligrams per cubic meter (mg/m3)
.5 mg/m3 (8-hour time-weighted average, total inhalable dust)

7. Importance (cont’d) Lungs: Nose: Eyes: Skin:
Asthma; Lung function impairment & Extrinsic allergic alveolitis (disease with flu-like symptoms)
Nose:
Rhinitis (runny nose), Violent sneezing, Blocked nose, Nose bleeds, Nasal cancer (very rarely)
Eyes:
Soreness, Watering, Conjunctivitis (pink eye)
Skin:
Allergic reactions, Irritation, Sensitisation dermititis

8. Importance (cont’d) Workplace Hazards and Concerns:
Unsafe footing: dusty floors
Increased fire & explosion risk
Machines:
Overheat: poor air circulation
Perform less efficiently: chip clogging
Insurance Policy Considerations

9. Overview - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
- Bringing it All Together
- Q&A

10. Physics – Moving Dust & Chips
Air Velocity Required = 4,000 FPM
( ~ 45 MPH )
Air Volume (CFM) Required = 1,000 CFM

12. Physics – Moving Dust & Chips
Static Pressure (SP) Affected by:
> Filter
> Ducting**, including:
Elbows
Wyes
Gates
Flex Hoses
> Machine’s dust hood & connection
** SP Greater in Smaller Ducting!

13. Fan Curve Example

14. Overview - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
- Bringing it All Together
- Q&A

15. Dust Management – Systematic Approach
Three Commandments of Dust Management
Collect Dust and Chips at Source
Limit Resistance (Static Pressure (SP))
Establish & Maintain Air Velocity
Regarding point #3, this includes pre-filtering with a cyclone and proper maintenance of your system. See Tommy Mac from Rough Cuts video:
There is also the option to introduce a Thein Baffle ( in lieu of a cyclone. It’s not as effective, but is undoubtedly better than having no pre-separation capability.

16. Types of DC Systems
Fixed (Ducted to Main Machines)
Moveable
Hybrid

17. Single-Stage DC
Fixed or Moveable

18. Two-Stage DC
Fixed (Mounted on a Stand)

19. Two-Stage DC
Movable

21. Add-on Cyclone Separator

22. Adding a Thien Separator
Video describing making and installing a Thien separator:
Video comparing Thien to Cyclone:

23. Shop Vacs Connecting to Small Machines General Shop Vacuuming Chores
Cyclone Pre-separator maintains Filter Performance

24. Dust pick-up for “Culprits”

25. Festool’s Router Dust Pick-up
Oneida’s Router Dust Pick-up 
Rockler’s Router Dust Pick-up

26. Downdraft Table
Youtube Video:

27. Ceiling-mounted Air Purifiers
Reduce ambient dust floating around shop
Commerical units available…
but you can make one for less than $40:
watch?v=kH5APw_SLUU

28. Dust Masks – Personal Protection
Fibre Filter
Half-face Mask
Full-face Mask 

29. Overview - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
- Bringing it All Together
- Q&A

30. Bringing it all Together
Budget & Workshop dictate Approach
Maximize:
Dust Ports & Hoods
Connectors
Ducting Layout
Use Second-party Validated HEPA Filters

31. Custom-fitted Ducting Connector Ideas
Molding PVC piping to make your own connectors:
Rob Cosman’s bandsaw connector:
Dust Collection on the Cheap: xpYGzJU6R8Y

32. Shop Built Hoods

34. Gates sized to “Connectors”

35. Non-Ducted Shop Provide Quick-disconnect Hose Connectors:
Schedule 40 PVC
Rockler, etc.

36. Ducted Shop Locate DC & layout Duct System to limit SP
air.com/static.asp?htmltemplate=static/ductwork_tutorial 01.html
Foil tape Joints

40. Validate System Performance: Air Velocity (CFM)
Anemometer:
- Measure air velocity
- Relatively inexpensive ($19 +)

41. Validate System Performance: Air Quality

42. Overview Q&A - Introduction - Importance of Dust & Chips Management
- Physics
- Dust Management – A Systemic Approach
Bringing it All Together
Q&A

43. Marty Schlosser & Philip Dube
Wood Dust & Chips
Management
Marty Schlosser & Philip Dube