Course Objective


Course Objective;
Students will process materials using hand tools while following these elements of knowledge, skills, strategies, attitudes and perceptions related to the competency

Students will learn, for the competency as a whole:

• Basic technical terminology
• Basic hand tools used in this competency: planes, saws, mallets, hammers, wood chisels, squares,
files, rasps, pliers, screwdrivers, measuring instruments, etc.
• Occupational health and safety: individual protective equipment, equipment safety, ergonomic work posture, etc.
• Method for using materials economically
• Importance of following the manufacturing process for the object

Specific
attitude required for this competency:

patience, in order to persevere in spite of difficulties encountered

Tuesday, 22 September 2015

Saws

Modern Cabinetmakers still use hand saws. Believe it!

 Japanese woodwork has had a heavy influence on our hand saws. 
So I like to divide our saws into 2 categories.

Western Push                     Japanese Pull

Dozuki Saw
Dovetail Saw






We use these saws to hand cut joints or do fine work that an electric saw would be too cumbersome to do. The teeth on a saw only cut in one direction. Either western style, while pushing the saw away from you. Or Japanese style, while drawing the saw toward you. Weather you prefer push or pull is up to you.


Both Western and Japanese saws have models which are made to perform either a Crosscut or a Rip





One way to tell the difference is to examine the RAKE

Rip Saws have a rake which is closer to 90 degrees





 Japanese Influence on modern Handsaws have reduced the of western saw's set.


 
 Today's saws have a more narrow SET and therefore leave a thinner KERF.






The Japanese saw's teeth have an inward angle on them called the FLEAM.

The fleam is what allows the set to be so narrow and cut so well.
Today it is common to find western handsaws with a fleam.


The other thing that differentiates Rip saws from Crosscut saws is the back.


  






Back Saws never rip because their back, which is designed to keep the blade rigid, is wider than the kerf they create.


 

Western Saws 
  1. Backless  / Rip or Crosscut
  2. Backsaw / Crosscut
  3. Coping / Curved sawing 
  4. Keyhole Saw /  small places 






This Backsaw is a Dovetail Saw.
It has a very thin set.









Japanese saws blades are also thinner and more flexible than western saws. However they are much more fragile.

  1.  Kataba / Crosscut
  2.  Ryoba / Combination Crosscut and Rip
  3.  Dozuki / For making Joints
  4.  Kugihiki / Flush cutting


Teeth Per Inch


  T.P.I. refers to the amount of teeth there are on the saw blade over the distance of one inch.
The more teeth per inch the finer the cut.
So saws with less TPI are used for fast rough work like big Western rip saws. Contrary, more TPI is typically a dovetail or dozuki saw for precision.

William "Saw" this Ryoba and grabbed it to do some precision ripping.