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Blade care & break-in, Downfeed rate, Downfeed pressure – Southbend SB1020 User Manual

Page 27: Blade care, Blade break-in

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For Machines Mfg. Since 8/09

Model SB1020

-25-

O P E R A T I O N

Blade Care & Break-in

Blade Care

To prolong blade life, always use a blade with

the proper width, set, type, and pitch for each

application. Maintain the appropriate feed rate,

feed pressure, and blade speed and pay attention

to the chip characteristics (Refer to the Chip

Inspection Chart on Page 26). Keep your

blades clean, since dirty or gummed up blades

pass through the cutting material with much

more resistance than clean blades, causing

unnecessary heat.

Blade Break-in

The tips and edges of a new blade are extremely

sharp. Cutting at too fast of a feed rate or too

slow of a blade speed can fracture these tips

and edges, quickly dulling the blade. Properly

breaking-in a blade allows these sharp edges

to wear without fracturing, thus keeping the

blade sharp longer. Below is a typical break-in

procedure. For aftermarket blades, refer to the

manufacturer's break-in procedure to keep from

voiding the warranty.

Use the Chip Inspection Chart on Page 26 as

a guide to evaluate the chips and ensure that the

optimal blade speed and feed rate are being used.

To properly break-in a new blade:

1. Choose the correct speed for the blade and

material of the operation.

2. Reduce the feed pressure by half for the first

50–100 in

2

of material cut.

3.

To avoid twisting the blade when cutting,

adjust the feed pressure when the total

width of the blade is in the cut.

Start and stop downfeed with the downfeed knob.

The downfeed rate is adjusted by turning the

downfeed rate adjust knob (Figure 24). Turning

the knob clockwise decreases the downfeed rate

and turning the knob counterclockwise increases

the downfeed rate.

Downfeed Rate

Figure 24. Downfeed pressure adjustment.

Downfeed Rate

Adjust Knob

Downfeed

Knob

The downfeed pressure is controlled by the

spring shown in Figure 25.

To decrease downfeed pressure, turn the cap

screw clockwise to increase spring tension.

To increase downfeed pressure, turn the cap

screw counterclockwise to release spring tension.

Downfeed pressure

Figure 25. Downfeed rate adjustment.

Spring

Cap

Screw