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Since 1952

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Grinding and Polishing Machinery Vonnegut Machinery in Indianapolis Indiana

V-Instructions 5


The 32 brush and 16 brush Vonnegut Heads use an abrasive loading having strips of abrasive 16” long. Four of these strips are held together with a cloth loop. These strips and the loop are called assembly. Some abrasive manufactures include the loop in their measurements and show a link of 19-3/8”.


One complete filling of a 32 brush head is called a loading. This consists of 8 assemblies. The 16 brush head uses only 1/2 loading--or 4 assemblies.



The abrasive loading may be installed in the head while the head is mounted on a spindle, or with the head laying on a bench or table. With the cap plate and safety ring* removed, (see photo 1) install each assembly with the cloth.

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Wolfhead & Vonnegut Sanding Heads


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with the part that is to be sanded or polished. With all assemblies in place, you will have strips of abrasive extending beyond each brush tip approximately 13 inches. (See photo 3) of all brush holders are enclosed within the lips of the cap plate. (See photo 6 the little finger is pointing to the ends...

Loop over one of the pins in the cylinder pin assembly and the abrasive strips projecting between 4 adjacent brush holders and brushes. (See photo 2)

Photo 1

Photo 2

the assemblies should be placed in the head so that when the head is rotating, the grain (abrasive side of the strips) will be making contact...

Photo 3

of all brush holders are enclosed within the lips of the cap plate. (See photo 6 the little...

finger is pointing to the ends of the brush holders that must be completely enclosed by the lips to which the index finger is pointing)

Photo 4

Photo 5

Photo 6


Mount the head on the spindle, and with the wrenches

provided, use one wrench to hold the hex hub and back

plate stationary while using the other wrench to turn the hex

hub and cap plate in the direction the head will rotate when

operating (see photo 7) Wind until approximately 1/2 “ to 3/4”

of abrasive is left protruding beyond the ends of the brushes.

(see Photo 8) Tighten the spindle nut with the wrench, (see

photo 9) and the Head is ready for operation.


If the spindle extends beyond the hub to the extent that the

threads do not allow the spindle nut to secure the head, it will

be necessary to insert a spacer between the spindle nut and

hub. It is important that the head be locked tightly against the

shoulder on the spindle. Always be sure that the ends of any

spacers that are used are square with the bore of the spacer. If

they are not, it may cause the spindle to spring when the nut is

drawn tight.


Do not attempt to wind in the abrasive by grasping the ends of

the pins with your hand. This may bend the pins. Always wind

the abrasive in with the cap plate in place.




When fresh abrasive is required, stop the head and loosen the

spindle nut sufficiently to allow turning the cap plate slightly in

the direction opposite normal Head rotation.


The proper distance to turn this can best be determined by

experience; but as a starting suggestion, either place a pencil

mark on the edge of the cap plate or imagine you have a mark

there. This mark should be moved approximately ¼ inch. This

will create slack in the loading. Tighten the spindle nut. When

the machine is restarted, extension of abrasive will occur

either from centrifugal force …. Or as soon as work pressure

is applied.



When replacing the cap plate, always be positive the ends of

each of the brush holders are within the lip of the cap plate


*Safety ring is not used on 1” wide models.

Photo 7

Photo 8

Photo 9

Vonnegut Instructions

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