How to set up a roller burnisher & set diameter on a machine spindle

This video demonstrates how to set up a (S.C.A.M.I.) roller burnishing tool on the machine spindle and to set the diameter before the initial cut. Roller burnishing is a cold-working process that produces a mirror finish by the planetary rotation of hardened rolls over a bored or turned metal surface. This process provides accurate size control with tolerances within 0.0005" or better (depending on variables such as material), achieves fine surface finishes between 1-10 µin Ra and increases surface hardness by 5-10%.

STEP 1: The burnishing tool will need adjusted to the smallest diameter range. To do this, loosen the locknut, lift the housing towards the locknut, and turn counterclockwise to the smallest diameter of the burnishing tool. This allows the tool to be lowered safely into the hole without catching or dragging against the top or sides of the hole.

STEP 2: Align the burnishing tool to X0 and Y0 of the hole.

STEP 3: Use a marker to put a horizontal line on the middle of the rollers.

STEP 4: Hold onto the cage and rotate the cage back and forth as the tool is lowered safely into the hole. Stop if you feel anything catch or drag. You will then need to reduce the diameter further. Stop lowering into the hole when half of the rollers are viable above the hole.

STEP 5: Adjust the burnishing tool to the correct working diameter. The locknut should be fully loosened. Pull the housing towards the locknut and turn counterclockwise to increase the diameter of the burnishing tool. Do not hold onto the cage. This should rotate freely as you adjust the housing/diameter If the cage and rollers have moved up during the diameter adjustment, lower the tool back down into the hole until half of the rollers are visible. The cage will stop rotating when there is contact between the rollers and sides of the hole. When this occurs, stop adjusting.

STEP 6: Use a marker to make vertical lines on each of the rollers. This will aid in determining if the rollers are moving during the adjustment.

STEP 7: Hold onto the tool holder, not the burnishing tool, and rotate the spindle. Visualize approximately half of the rollers are turning. If not, adjust the diameter until they do. Stop adjusting when it appears that half of the rollers are making contact and rotating.

STEP 8: Slowly raise the burnishing tool about two inches above the hole. Pull up on the housing and turn counterclockwise one complete turn. This is a good starting point and will likely require additional adjustment.

STEP 9: Tighten the locking screw so it is snug, no need to overtighten.

STEP 10: Verify the hole finish and size by making a shallow test cut.

STEP 11: Make an adjustment of one turn and repeat burnishing in the same test cut. When it appears the burnishing tool is working the surface but not to the desired finish, adjustments on diameter will only need a half or quarter of a turn.

STEP 12: Stop adjusting when the desired finish is achieved.

For more information about Allied Machine and Engineering (S.C.A.M.I.) burnishing tools visit: https://www.alliedmachine.com/Products/Burnishing/S-C-A-M-I-Roller-Burnishing.aspx

Burnishing catalog: https://alliedmachine.cld.bz/Roller-Burnishing

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Видео How to set up a roller burnisher & set diameter on a machine spindle канала Allied Machine & Engineering