Dings Magnetic Group PERMANENT DEEP DRAW DRUM - Manual (Page 3)

SPLITTER
A splitter plate (not supplied by Dings) should be installed below
your drum as shown. It’s an aid to keeping the nonmagnetic
product separate from the magnetic product, after these products
are discharged from the drum.
The splitter should be made of nonmagnetic metal, and it should be
at least as wide as the drum shell. Make it adjustable vertically and
horizontally. Adjust it when material is running over the drum, for
maximum separation of the discharged products.
DRUM DRIVE
The Deep Draw Drum is usually furnished by Dings without a motor
and drive. However, the drum is always furnished with a split
sprocket bolted to one side. A matching drive sprocket and roller
chain must be used to drive the drum.
See your certified print of a Dings drawing for more details about the
sprocket. Sheave and belt-driven drums are available as options at
time of order. The certified print has more details about this.
Maximum magnetic separation occurs when the peripheral speed of
the drum is between 200 and 250 fpm. The corresponding rotational
speeds are:
32 to 40 RPM for a 24” diameter drum
25 to 32 RPM for a 30” diameter drum
21 to 26 RPM for a 36” diameter drum
18 to 23 RPM for a 42” diameter drum
16 to 20 RPM for a 48” diameter drum
13 to 16 RPM for a 60” diameter drum
MAINTENANCE
The Deep Draw Drum does not require extensive maintenance
other than periodic greasing of bearings, and inspection of the wear
cover.
Two external bearings on the drum heads have alemite grease
fittings. Lubricate them in your normal lubrication schedule, with
grease conforming to NLGI Grade 2. However, if conditions are
very dirty, lubricate at least every 2 weeks.
Watch for excessive wear on the manganol steel wear cover.
Although extremely resistant to wear, it can be dented by large
heavy pieces falling on it. Severe dents can cause damage to the
internal magnet assembly.
Replacement wear covers, complete with pre-welded cleats, are
available from Dings. They’re furnished as 2 semicircular half-
covers that must be tack welded in place. Follow these steps to
replace a wear cover:
1) Grind off all welds holding the worn cover - the welds along
both seams that cross the face, and the welds on the sides
where the wear cover butts against the drum heads.
2) Put replacement cover on drum shell, temporarily banding it
in place.
3) Rotate drum shell so that all welding will be done on the
side opposite the magnetic field (magnet arc).
4) Weld replacement cover in place with a 304 SS or chrome
manganese rod, using maximum 3” to 4” long welds along
both seams, every 10”. Tack weld at several points where
the cover butts against the drum heads.
TROUBLE SHOOTING
If there is a sudden and excessive drop in the amount of magnetics
separated, it is possible that the internal magnet assembly slipped
out of position. This would cause the magnet arc to be in the wrong
position. Check the magnet arc position according to instructions in
earlier paragraphs.
If the drum shell does not revolve freely, or there is noise when
the shell revolves, there is internal interference between the shell
and the magnet assembly. A slight ticking sound at one point that
does not interfere with rotation is not serious. The cause will wear
away. However, any loud noise or internal rubbing that does impede
rotation should be reported to Dings.