bowls

machines: bowls
VBT Range The VBT machine is one of the most simple, economical machines on the market today. The flat sided , semi-toroidal bottomed working area of the bowl ensures a perfectly homogenous distribution of components and media, making for optimum use of the full working bowl. Parts are extracted manually and in order to make this operation easier, the machine can be supplied with a reverse facility.Reversing the motor is designed to encourage the components being processed to come to the surface of the media, thereby making it easier to identify and unload them.
The VBT machine is recommended for the processing of medium/ large items, where automatic unloading does not have any particular advantage or where unloading over a dam and screen may cause damage to delicate parts. In addition, where the machine is to be used for a variety of parts of different sizes and batches, an auto-unload machine has no real advantage over the VBT. Frequent changes of selection grids and media sizes, with the consequent problems of machine fittings, tend to outweigh the benefits.

VBTA Range

Operation: VBTA machines have a bowl which slopes in one half, with integral separation. Three dimensional vibration enables the media and workpieces to rotate uniformly and continuously. The special bowl shape greatly reduces the risk of damage to the workpieces. On the completion of treatment a flap is operated either manually or pneumatically and separation starts.The workpieces are delivered and the abrasive media return through the screen to the bowl.

Adjustments: Choice of two motor speeds, or can be fitted with a speed controller. Weights can be adjusted to the bottom unbalance unit to adjust amplitude and hence performance. Range of adjustment: 0-90o

Construction: The bowl is of steel sheet and the bowl base is an integral pressing. Bowl has lining of highly wear resistant polyurethane. Helical rubber-capped springs cut down noise and transmission of vibrations to the rugged base of the machine. Vibration dampers (polyurethane feet) enable the machine to be installed without anchorage. These machines are of simple and rugged construction capable of withstanding very rough operating conditions with little attention.

Optional electrical equipment: Separate switchbox with main switch interlock, timer. 2 speed selector, control for metering pump, working hourmeter. Motor protection switch for electric motors cutouts.

Specification	VBTA 100	VBTA 150	VBTA 300	VBTA 600
Total Capacity (lt)	85	120	300	620
Rating (kW)	0.75	0.75	3.7	5.6
2 Speeds (min^-1)	1500/900	1500/900	1500/900	1500/900
Total Weight (kg)	230	320	800	1150
Abrasive media load, plastics (kg)	ca. 50	ca. 90	ca. 220	ca. 550
Abrasive media load, ceramic (kg)	ca. 75	ca. 120	ca. 300	ca. 700

VBTH Range

Similar in operation to the VBT machines, the VBTH range has a semi-automatic separation system where parts and media come up a dam and over a grid. The parts (being larger) feed over the grid and into a receptacle. The media drops back into the machine through the grid. With ferrous metals the unload system can be further developed to incorporate magnetic rollers and demagnetizers.
The VBTH machines are ideal for large batches of items of similar size and geometry - thus obviating the need to continually change the grid size and/ or media.

The VBTH machine can be introduced into production lines in a semi-automatic or automated state. P.C. controlled production lines (the unload facility operated pneumatically) can in a lot of cases take the raw product and completely process it (including separation, washing and drying).

VBTS Range

The main characteristic of the VBTS machine is the toroidal bowl shape.
The immense benefit of this characteristic is that it guarantees perfect uniformity of media roll even with reduced vibration amplitudes, thus reducing part on part impingement and drastically increasing loading factors.
The VBTS is therefore extremely suitable for special projects and also for particularly delicate parts. Components made from brass, zinc and

aluminium can be finished to a pre-plate condition. We recommend that the bowl has a rubber lining for delicate parts.
Naturally, when you consider the delicate nature of the parts for which the VBTS is suitable, manual unload is a must.
Variations of the VBTS machine include a bowl which is toroidal on the inside diameter as well as the outside (available for VBTS 380 and 600 ranges only) and the machines can also be supplied with pneumatically operated discharge doors for automatic, timed discharge of parts and media.

Specifications	VBTS 100	VBTS 200	VBTS 380	VBTS 600
Total Capacity lt	85	200	330	600
Motor Power (HP)	1	2	5	7.5

Specification	VBT 100	VBT 150	VBT 600	VBT 1100
Total Capacity lt	100	150	620	1100
Motor Power (HP)	1	1.5	7.5	7.5
Parts Load lt	20	30	110	200

Specifications	VBTH 150	VBTH 300	VBTH 600
Total Capacity lt	150	300	620
Motor Power (HP)	1.5	5	7.5
Parts Load lt	30	50	110