| |
| |
|
|
| |
| order should consist of the following: |
| tooth shape, tooth pitch,
width and thickness, saw length, sort and condition of treated wood,
need for construction, rolling, pressing or tooth-overhouling, width
of pressed part or of overhouled on one side, size and location
of bombeo (saw rolling acc. to wheel shape) |
| |
| blade
geometry |
| |
| |
| |
| angle
parameters spring set and swaging set breadth of band saw blades |
| |
| kind
of wood |
hook
angle   |
breadth
of spring set on one side - mm |
breadth
of swage
set on one side |
| oak |
17
- 22 |
0,3
- 0,4 |
0,25
- 0,35 |
| beech |
20
- 25 |
0,3
- 0,4 |
0,25
- 0,35 |
| coniferae |
22
- 25 |
0,5
- 0,55 |
0,45
- 0,5 |
| leafy
wood |
25
- 30 |
0,5
- 0,65 |
0,45
- 0,6 |
|
| |
| catalogue
number |
band
saw |
tooth
shape |
| 1300170 |
25
x 0,7 |
NV
8 |
| 1300290 |
50
x 0,9 |
NV
12 |
| 1310240 |
100
x 1,0 |
PV
35 |
| 1310360 |
120
x 1,2 |
PV
45 |
| 1310510 |
150
x 1,3 |
PV
45 |
| 1310600 |
181
x 1,47 |
PV
45 |
| 1310660 |
206,4
x 1,47 |
PV
45 |
|
| |
| Sharpening of band saws |
| |
| Saws are sharpened with
grinding discs made of precious corundum of corresponding hardness,
grain size and fastener. The best sharpening results are achieved
with grinding discs of hardness M-N, grain size 60-80 and ceramic
fastener. |
| In case there are no
possibilities for sharpening with corresponding grinding discs,
it is recommendable to use softer discs. Width relation of grinding
disc and tooth pitch should normally be around 1:3. Grinding discs
with fastener of synthetic gum are recommendable for especially
fine grinding. |
| |
| |
| |
| Besides correct sharpening,
band saw must be properly stretched with rolling, and in case of
pressed tooth, it should be properly pressed also. |
| |
| Stelliting |
| |
| Stelliting is performed
by welding process in plasma for all band saws with pitch larger
than 25 mm. Tooth sharpening and profiling is executed with grinding
discs by wet process. |
| During stellited saws
ordering following should be specified: |
| tooth pitch, front –angle
parameters, side free space and sort and condition of treated woods. |
| |
| Due to large quantity
of welded stellite, saws can be sharpened more than 10 times until
additional stellite application. |
| |
