Grizzly T1227, Instructions Manual

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T1227/28/29 Magnetic Chuck (Mfd. Since 09/17)

Using Auxiliary Magnetic Blocks

If  your  workpiece  cannot  be  placed  flat  on  the 
chuck due to warping, an irregular shape, or any 
other  reason,  you  must  use  auxiliary  magnetic 
blocks  to  support  the  workpiece.  To  ensure  that 
the  workpiece  is  held  parallel  to  the  chuck,  you 
may  need  to  grind  the  auxiliary  magnetic  blocks 
before placing your workpiece in them.

Figure 6 shows  an  example  of  how  magnetic 
V-blocks can be used to mount a workpiece with 
an irregular bottom surface.

Workpiece

Auxiliary 

Magnetic Blocks

Figure 6. Using auxiliary blocks.

Only use magnetic blocks on this chuck 

to hold irregular workpieces. Using non-

magnetic auxiliary blocks will not provide 

sufficient clamping force and may result in 

workpiece being thrown from grinder and 

into operator or bystanders during use.

Removing Workpiece

After  the  grinding  operation,  remove  your  work-
piece from the magnetic chuck.

To remove a workpiece from chuck:

1.  DISCONNECT MACHINE FROM POWER!

2.  Turn ON/OFF selector to OFF position.

3.  Clean  away  any  metal  chips  or  swarf  from 

around  workpiece  and  magnetic  chuck  with 
a  stiff-bristled  brush  and  remove  workpiece 
from chuck.

Note:  Workpiece may seem stuck to chuck 
due to residual magnetism in workpiece or 
a vacuum between workpiece and chuck. 
If this is the case, a blast of air from an air 
nozzle can be used to release the vacuum. 
Alternately, you can slide the workpiece off 
the side of the chuck to remove it. Using this 
method, however, may result in scratches to 
the chuck surface.

Care & Maintenance

For  optimal  performance  from  your  magnetic 
chuck, follow the maintenance schedule below.

Daily:

• 

Check/correct loose clamping bolts.

•

Use  a  vacuum,  rag,  or  brush  to  clean  the 
chuck  after  use.  Never  use  air  pressure  to 
clean metal chips/swarf away from a chuck.

• 

Apply  rust  preventative  to  magnetic  chuck 
after each use to prevent rust.

• 

Avoid  leaving  a  workpiece  on  the  magnetic 
chuck when not in use.

• 

Inspect  for  damage  to  the  surface  of  mag-
netic chuck that may compromise its flatness. 
Regrind as necessary.

• 

Stone chuck surface before use.

Monthly:

• 

Grind top of magnetic chuck to reduce effects 
of warping.

Semi-annually/Annually:

• 

Remove  chuck,  re-grind  table,  re-install 
chuck, then re-grind chuck surface.

If you plan to place your surface grinder 

into storage, remove magnetic chuck from 

table. Metal objects left on grinder table 

over extended periods will rust and cause 

permanent damage to magnetic chuck and 

grinder table. Store magnetic chuck on a 

flat surface to minimize warping.