laguna 37x2, Owner'S Manual

18 
 

S

ELECTING 

D

RUM 

A

BRASIVES

It is important to select the proper grit of abrasives 
for the type of sanding being performed to achieve 
maximum sanding results. As with any sanding 
operation, first begin sanding with a coarser grit, 
depending on the roughness of the stock or the 
amount of stock to be removed. Then progressive- 
ly work toward finer grits. The chart below shows 
the general uses for the various grits. Performax 
Products offers abrasives in the ten different grits 
shown.

Selecting Abrasive Grits. 

The amount of stock to 

be removed is a major consideration when choos- 
ing the grit grade to start with. Grits 24, 36, 50, 
and 60 are primarily designed for stock removal. 
Grits 24 and 36 will remove the most material in 
one pass, whether you are doing abrasive planing, 
cleaning up glued panels, or flattening stock. Grits 
from 100 through 220 are primarily finishing grits 
designed to remove the scratch pattern from the 
previous grit used. For best results, never skip 
more than one grit grade when progressing 
through a sanding sequence.

For fine work, such as furniture, try not to skip 

any grit grades during the sanding process. In gen- 
eral, premium quality abrasives such as genuine 
SuperMax abrasives will produce a better finish

with a less noticeable scratch pattern. 

Caution

: 

Grits that are too fine can sometimes burnish the 
wood and leave a glossy surface which will not 
accept stains evenly. This will vary by type of 
wood. Oak, for example, is susceptible to burnish- 
ing because of its open pores.

Selecting Grit Combinations. 

The chart shown 

is a general guide to consult when selecting grits 
to use on dual drum machines and setting the rear 
drum. This chart is also provided under the dust 
cover on the S

UPER

M

AX 

for quick reference. The 

first column suggests grits for the primary (front) 
drum of dual drum models, while the second 
column suggests a corresponding grit to use on 
the second (rear) drum. The third column 
suggests depth settings to try on the rear drum, 
depending on the grit used. The setting values are 

based on a “0” reading when the drum contacts 
the work piece but still can be rotated by hand.

Note that the grits and settings are starting sug- 

gestions only. Other combinations and settings are 
possible, depending on your particular circum- 
stances. It is a good idea to keep records of the 
combinations you use and their results. Keeping 
these records handy will help you select the best 
combinations of grits for future work.

A

BRASIVE 

S

ELECTION 

G

UIDE

G

RIT     

C

OMMON 

A

PPLICATION

24 Grit        Abrasive planing, surfacing rough-sawn boards, maximum stock removal, glue removal. 

36 Grit        Abrasive planing, surfacing rough-sawn boards, maximum stock removal, glue removal.  

50 Grit        Surfacing and dimensioning boards, trueing warped boards. 

60 Grit 

 Surfacing and dimensioning boards, trueing warped boards.  

80 Grit 

Light dimensioning, removal of planer ripples. 

100 Grit 

Light surfacing, removal of planer ripples.  

120 Grit 

Light surfacing, minimal stock removal.                                                                    

150 Grit 

Finish sanding, minimal stock removal. 

180 Grit 

Finish sanding only, not for stock removal. 

220 Grit 

Finish sanding only, not for stock removal.