Dull blade missing teeth Replace blade | Southbend SB1021, SB1022

Model SB1021/SB1022

T R O U B L E S H O O T I N G

For Machines Mfg. Since 8/09

Possible Cause

Possible Solution

Machine or blade	1.	Excessive load on the blade.	1.	Reduce feed rate or increase blade speed
bogs down in the	2.	V-belts loose; belt squeals at times.	2.	Tighten V-belts.
cut.	2.	V-belts loose; belt squeals at times.	2.	Tighten V-belts.
cut.	3.	V-belts worn and slips.	3.	Replace V-belts.
	3.	V-belts worn and slips.	3.	Replace V-belts.
	4.	Blade is loading up.	4.	Install a blade with more suitable TPI or different
				style of teeth.
	5.	Blade is dull, wanders, and gets	5.	Replace blade, adjust guides and tracking.
		pinched in the cut.
	6.	Blade is dull.	6.	Replace blade.

7.The blade TPI is too coarse for the 7. Use a blade with at least 2 teeth contacting the

		thin workpiece.		material at all times.
	8.	Blade is loose.	8.	Clean wheels and increase blade tension.
	9.	Material requires cutting ﬂuid.	9.	Use applicable cutting ﬂuid.
	10.	The run capacitor is at fault	10.	Replace the run capacitor.
		(SB1021 only).

Blade tracks	1.	Feed rate is too fast.	1.	Reduce feed rate, or decrease blade TPI.
incorrectly, or	2.	Blade is not tracking correctly.	2.	Adjust blade tracking.
comes off wheels.	2.	Blade is not tracking correctly.	2.	Adjust blade tracking.
comes off wheels.	3.	Blade is bell-mouthed.	3.	Install new blade, and regularly remove tension
	3.	Blade is bell-mouthed.	3.	Install new blade, and regularly remove tension
				from blade when not in use.

4.Blade is dull, wanders, and gets 4. Replace blade, re-secure the workpiece from

pinched in the cut.	shifting.
5. Rubber tire on wheel is damaged,	5. Replace or dress rubber tires.
glazed, or worn.

6.Wheels are not coplanar.6. Adjust wheels so they are parallel and aligned.

7.	Blade tension is too loose.	7.	Increase blade tension.
8.	Blade guides need adjustment.	8.	Adjust blade guides.
9.	Incorrect blade for bandsaw.	9.	Install correct blade for machine.

10.The blade has insufﬁcient support. 10. Tighten the blade guide as close to the workpiece as

possible.

	11.	Wheel tires are loaded with metal	11.	Clean wheel tires.
		shavings.


The cut is crooked,	1.	Blade spinning backwards due to	1.	Swap two power incoming power leads (see Page
the blade wanders,		machine being wired out of phase		47).
slow cuts, or shows		(SB1022 only).
overheating on one	2.	The feed pressure is too high.	2.	Decrease the feed rate.
side of the cut or	2.	The feed pressure is too high.	2.	Decrease the feed rate.
side of the cut or	3.	Too much side pressure when	3.	Feed workpiece straight into the blade.
the blade.	3.	Too much side pressure when	3.	Feed workpiece straight into the blade.
		feeding workpiece.
	4.	Blade is loading up.	4.	Install a blade with more suitable TPI or different
				style of teeth.

5.Blade installed backwards.5. Check blade rotation as described in “test run” and reverse blade if necessary.

6. Dull blade; missing teeth.

7.Blade too wide for size of radius 7. Install a smaller width blade, or increase blade

being cut.

tension.

8.The blade speed is wrong.8. Adjust feed rate and cutting speed as required.

9.The blade tracking is wrong.9. Adjust the blade tracking back to normal.

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