Reading a wood cutting blade specification

Click For Summary
SUMMARY

This discussion focuses on understanding wood cutting blade specifications, specifically regarding the compatibility of grinder spacer flange nuts with different bore diameters. It is established that a spacer is only used with a 16 mm spindle and that the flange nut must be sufficiently large to secure a 20 mm blade. Key specifications include 72 teeth per inch (72T), a 4-inch diameter, and a blade thickness or kerf width of 1.1 mm. The consensus warns against using saw blades on handheld grinders without proper safety measures, emphasizing the importance of blade material and configuration.

PREREQUISITES
  • Understanding of wood cutting blade specifications
  • Knowledge of grinder components, including spacer flange nuts
  • Familiarity with High Speed Steel (HSS) materials
  • Awareness of safety protocols when using power tools
NEXT STEPS
  • Research the specifications of different wood cutting blades, including tooth count and kerf width
  • Learn about the safe use of grinders with saw blades and the necessary safety equipment
  • Explore the properties and applications of High Speed Steel (HSS) in cutting tools
  • Investigate the various types of saw blades and their specific applications in woodworking
USEFUL FOR

This discussion is beneficial for woodworkers, tool enthusiasts, and safety officers who are involved in the selection and use of cutting tools, particularly those working with grinders and saw blades.

abdulbadii
Messages
43
Reaction score
1
TL;DR
How to read and understand a wood cutting blade specification
How do we read and understand a wood cutting blade specification (e.g. below) ?
Is the grinder spacer flange nut for 16 mm center diameter metal cutting disc can safely be used for 20 mm one of such blade?
main-qimg-21e08f906878a5ef464abfbb23d23111-lq.jpg
 
Engineering news on Phys.org
abdulbadii said:
Is the grinder spacer flange nut for 16 mm center diameter metal cutting disc can safely be used for 20 mm one of such blade?
The spacer is NOT used with a 20 mm spindle.
The spacer is used when the spindle is 16 mm.
The spacer is used to center the saw blade on the spindle while the flange nut is being tightened. The flange nut must be big enough to retain the 20 mm blade.
 
  • Like
Likes   Reactions: berkeman
72T = 72 Teeth per inch total around the blade
4" = Diameter in inches
1.1mm = not sure on this, either blade thickness OR kerf width (width of the cut)
20mm = bore (central hole) diameter

HSS = blade material, High Speed Steel
 
Last edited:
  • Like
Likes   Reactions: Lnewqban
abdulbadii said:
...grinder ... cutting disc can safely be used
I cannot really add anything about the original question, but ... well, these kind of saw blades just cannot be used safely on a (handheld) grinder.

Especially in the frequently used configuration, without the guard.
 
  • Like
  • Wow
Likes   Reactions: DaveE, abdulbadii, berkeman and 1 other person
Tom.G said:
72T = 72 Teeth per inch
Think more carefully about this.
 
  • Like
Likes   Reactions: Tom.G and berkeman
Rive said:
I cannot really add anything about the original question, but ... well, these kind of saw blades just cannot be used safely on a (handheld) grinder.
Wait, what?

abdulbadii said:
Is the grinder spacer flange nut for 16 mm center diameter metal cutting disc can safely be used for 20 mm one of such blade?
What in the world are you trying to do?
 
berkeman said:
Wait, what?
link (sorry, members only - but the excerpt and the picture tells everything you need to know).

There are ways to (safely) use grinders with saw blades, but I think it's better to have a warning here.
 
  • Wow
Likes   Reactions: berkeman
Rive said:
link (sorry, members only - but the excerpt and the picture tells everything you need to know).
Holy Crap! Here, hold my beer for a minute...
 
  • #10
Tom.G said:
72T = 72 Teeth per inch

Averagesupernova said:
Think more carefully about this.
Oops! You're right. That is a TOTAL of 72 Teeth around the blade.
Corrected.

Thanks for the catch!
 
  • Like
Likes   Reactions: berkeman and Averagesupernova

Similar threads

  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 46 ·
2
Replies
46
Views
7K
  • · Replies 13 ·
Replies
13
Views
2K
Replies
6
Views
5K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 18 ·
Replies
18
Views
3K
  • · Replies 10 ·
Replies
10
Views
3K
Replies
1
Views
2K