User Manual

Level welds quickly to match #3 and #4 directional mill finishes
In three easy steps, using the 3M finishing system, you can grind and blend welds to match #3 or #4 finishes.
Step 1:
Leveling the Weld
Abrasive: 3M
™
Cubitron
™
II Fibre
Disc 987C, 7", Grade 60, featuring
3M proprietary precision-shaped
ceramic grain.
Final Blending
and Touch-Up
Applications
Use a Scotch-Brite
™
Hand
Pad 7446 for final blending
and touch-up of stainless
steel finishing.
Finishing has never been easier
A complete system of 3M tools and accessories to make your finishing job simpler.
3M
™
File Belt Sander
Uses coated abrasive
and Scotch-Brite
™
Belts
(1/8"–3/4" x 18"–24") for a
wide variety of metalworking applications. Steel drive wheel
attached. Includes standard attachment arm (PN28368) and
rubber drive wheel. 24" belts require 3M
™
File Belt Sander
Extension (PN28376).
Part # Max RPM Motor
28366
22,000 .6 HP
3M
™
File Belt Sander
Attachment Arm —
Corners Style
Sand corners and grooves with
contact wheel. Use with coated
abrasive and Scotch-Brite
™
Belts.
Part # Belt Size
28372
1/8" or 1/4" x 18"
3M
™
File Belt Sander
Attachment Arm —
Vessel Arm
Sand with contact wheel.
Unique large arm used for
blending weld seams. Use with
coated abrasive and Scotch-Brite
™
Belts.
Includes tracking/control knob.
Part # Belt Size
28375
1/4" or 1/2" x 24"
Step 2:
Setting the Grain
Abrasive: Set directional
grain with 3M
™
Cloth Belt 777F,
Grade P120.
Tool: 3M
™
Inline Sander (28339)
3,500 RPM with 3M
™
Expander
Wheel (28348/28349).
3M
™
Disc Sanders
3M got the right angle “right”
on these new Disc Sanders
for metalworking. A 97° head
angle (vs. 90°) allows for more comfortable wrist position
and improved ergonomics. The lightweight, compact design
generates less vibration and allows for better control. Features
adjustable directional exhaust. Hard 3M
™
Roloc
™
Disc Pad and
1/4-inch collet included.
Part # Diameter Max RPM Motor
20231
2" 20,000 .5 HP
28341
2" 20,000 .3 HP
20232
3" 15,000 1 HP
28329*
2" 12,000 .5 HP
*Also supports 3" and 4" backup pads.
3M
™
Inline
Sanders
Generate straight line scratches for finishing
stainless steel and other metals. These
straight shaft sanders can be used with
inflatable or slotted wheel accessories.
3M recommends 3M
™
Rubber Slotted
Expander Wheels (PNs 28348 or 28349).
Part # Max RPM Motor
28338
1,600 1 HP
28339
3,500 1 HP
3M
™
Rubber
Slotted Expander
Wheels
Internal slotted rubber drum expands with
centrifugal force to keep the belt tight while
grinding. Designed with a 1/4" radius to help
prevent transition marks from edge of belt.
Use #3 Wheel Adaptor Kit (PN45038) to mount
to a 3M
™
Inline Sander.
Part # Dimensions Belt Size
28348
5" x 3-1/2" 3-1/2" x 15-1/2"
28349
3.4" x 3" 3" x 10-11/16"
Step 3:
Final Finishing
Abrasive: Scotch-Brite
™
Surface
Conditioning Belt, A MED to blend
surface to a #4 finish.
Tool: 3M
™
Inline Sander (28338)
1,600 RPM with 3M
™
Expander
Wheel, 5" dia. (28348).
— or —
3M
™
Inline Sander (28339) 3,500
RPM with 3M
™
Expander Wheel,
3.4" dia. (28349).
Abrasive and accessory sold separately.