Mittler Bros Machine & Tool 2800 Straight Brake - Manual (Page 10)

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Step 2: Allowing for Metal Thickness
The Upper Clamp Assembly must be adjusted to allow for clearance based on the material thickness
to be worked.
· Slightly unclamp the clamp handle, loosen the bracket lock screw and turn the adjusting
bracket screw to move the Upper Clamp Head forward or rearward.
· Move the clamp back from the apron at least one and one half times the thickness of material
being formed when forming up to 18 gauge (.050) material, and at least 2 times the thickness
of material being formed when forming 16 gauge (.0625) or more. Re-check clamping
pressure.
· Retighten the bracket lock screw, after the correction is made.
· Lock the bracket locking handles for repeat bends.
General Rule:
18 Gauge (0.050”) or less metal thickness = 1-1/2 times the material thickness.
16 Gauge (0.060”) or more metal thickness = 2 times material thickness.
CAUTION:
If the Upper Clamp Head is too close to the front edge of the Bed, the Clamp Head may be damaged.
If the Upper Clamp Head is too far from the front edge of the Bed, a larger radius may be made in the
material.
Adjusting Bracket
Screw
Bracket Lock Screw