3M stainless steel right angle weld grinding application profile Manual De Usuario
Versatility of alternate contact wheels – Ability to match weld width and desired finished radius with custom shaped
contact wheels on the same tool.
contact wheels on the same tool.
Improved safety and ergonomics – Grinding wheels need guards, some rubber bonded and cotton impregnated wheels give
off an odor during use.
off an odor during use.
Constant diameter of abrasive – Wheel diameter does not change as abrasive belt wears, leading to more repeatable
finishes and a constant abrasive belt speed.
finishes and a constant abrasive belt speed.
Large portfolio of belts available to match weld finishing applications – Large variety of abrasive belt widths,
backings, grades, and minerals are available.
backings, grades, and minerals are available.
Process Information
3M offers a complete system using coated abrasive and surface conditioning belts on a Dynabrade
®
Dynafile III tool
for leveling, blending and finishing right angle welds on stainless steel. The advantages of this system are easier access,
faster stock removal and less undercutting than other methods such as grinding wheels, cut down wheels, coated abrasive
square and cross pads and other products frequently used to finish fittings, manways, frames and bracing.
faster stock removal and less undercutting than other methods such as grinding wheels, cut down wheels, coated abrasive
square and cross pads and other products frequently used to finish fittings, manways, frames and bracing.
A variety of belt sequences can be used on a single Dynafile III Abrasive Belt tool to achieve a wide variety of industry-
regulated finishes fast and conveniently – making full use of the abrasive while getting at those hard-to-reach areas.
regulated finishes fast and conveniently – making full use of the abrasive while getting at those hard-to-reach areas.
Tech Tip: A Dynabrade tool is recommended because it allows the complete usage of the abrasive and constant access
to confined work areas without interference from the tool.
to confined work areas without interference from the tool.
Step1:
Weld Cut Down
Begin the process by using a 1/4" x 24" 3M
Begin the process by using a 1/4" x 24" 3M
™
Belt 977F, grade 50, for cutting down the weld. This belt
contains 3M
™
Cubitron
™
Abrasive Grain and a grinding aid for fast cuts and cooler running on stainless.
Tech Tip: Keep tool moving to reduce undercuts, work in the center of the weld leaving a slight
transition line of material, or witness, on both sides of the weld.
transition line of material, or witness, on both sides of the weld.
Step 2: Refinement
Use a 3M Belt 777F grade P120 with a scalloped edge to remove the witness lines and refine the finish.
It is critical to leave only a slight transition line during step 1 so the finish can be refined with the 777F P120 without
It is critical to leave only a slight transition line during step 1 so the finish can be refined with the 777F P120 without
undercutting.
Tech Tip: 777F works better under lower pressure. It is critical to leave only a slight transition line from
step 1 as removing too much material in step 2 can lead to undercutting.
step 1 as removing too much material in step 2 can lead to undercutting.
Step 3: Final Finishing
For the final finish, select a Scotch-Brite
™
Surface Conditioning Belt.
Tech Tip: Grade A MED is good starting point.
Optional Step 4: For Other Finishes
To achieve a pharmaceutical finish, choose 3M
™
Trizact
™
Belt 237AA in a series of grades A100, A45, and A16.
To achieve a surface finish of less than 32 micro-inch for dairy applications, refine the repair area after step 2 with a
Trizact
Trizact
™
237AA grade A100 scalloped edge belt followed by a forth step of Scotch-Brite
™
Surface Conditioning Belt
in grade A VFN.
Contact your 3M Representative for more details.
Market: Metal Fabrication
Application Description: Grinding and finishing right angle welds in confined areas on fittings, manways, frames and bracing.
Application Description: Grinding and finishing right angle welds in confined areas on fittings, manways, frames and bracing.
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