Tire changers

	The GT999 model from Zhuhai Jiayi is a fully automatic tire changer with 14 to 24in internal and 15.5 to 26.5in external rim clamping.

China suppliers of tire and wheel changing equipment are aggressively pursuing performance upgrades to strengthen their OBM lines. Stricter QC measures are also being implemented to ensure that units run smoothly.

High-capacity clamping is the priority for tire changers, with many companies incorporating twin cylinders. This variation provides more power to hold wide and large rims, helping to prevent them from slipping off. In addition, it enables reliable centering and faster mounting.

For greater precision, wheel balancers are being fitted with piezoelectric ceramic sensors instead of strain gauges. Exhibiting more sensitivity, the former measures vertical force components and converts these into electrical signals, which are then fed to the data processing system. Calculated values can be displayed in grams or ounces and millimeters or inches.

Several of the latest models are accurate to within ±1g. The common cycle time is 10 seconds, although some designs can identify imbalances within 8 seconds.

In the wheel aligners category, systems with eight CCD infrared sensors are being introduced. Two are mounted on each tire, framing the vehicle on all four sides. Such a setup forms a 360-degree measuring zone, allowing for more-precise results.

The use of Bluetooth technology for transferring imaging information to a computer console is also gaining ground. This wireless module does away with connector cables, providing maximum flexibility in the workshop. Further, it extends transmission range and reduces signal interference.

To take QC a notch higher, suppliers are collaborating with local automotive repair and maintenance stations for the on-site testing of new products. Monitoring how units fare under actual workshop conditions is preferred since this makes it easier to spot performance glitches.

These tie-ups are advantageous in terms of R&D as well, with companies enjoying access to a shop’s extensive record of tire parameters. Makers in the wheel aligners segment are now capable of storing specifications for more than 15,000 vehicles. The database can be expanded through computer networking.

In addition, some enterprises turn to universities and research institutes for technological support.

Manufacturers usually invest 1 to 3 percent of annual sales in product development.

Efficient machine operation tops suppliers’ R&D agenda largely because this is a key selling point in the OBM segment, which absorbs at least half of the industry’s exports.

China makers have been able to cultivate this sector, since buyers of tire/wheel changing equipment are not as brand-conscious as those sourcing consumer items. In fact, companies said clients’ primary concern is the unit’s performance.

Models from China are exported primarily to the Middle East, Southeast Asia and South America. But by heeding product reliability concerns, manufacturershave also won the confidence of several OBM buyers in the EU and the US.

The majority of shipments to the former, however, are under OEM contracts. It is actually the line’s biggest importer.

Exports account for 30 to 40 percent of China’s output. While sales have dropped by as much as 30 percent since the economic recession, forecasts for the months ahead are generally upbeat.

A number of companies are hopeful that business will stabilize or even grow by 10 percent as demand begins to recover. Although others expect the downturn to continue, they are optimistic that this will ease slightly.

Most units made from local components, machines

China-made tire/wheel changing machines are available in manual, and semi- and fully automatic models. Components are often sourced within the country. For upscale designs, the ICs, sensors, bearings and hydraulic parts can be procured in Germany, Italy or the US to ensure reliability.

Suppliers offer replacement components, although up only to a certain cost. Typically, the aggregate value of spare parts a company provides does not exceed 3 percent of the equipment’s worth.

Products are manufactured mostly using domestic machinery. Some factories are equipped with units from Italy and Germany. QC procedures, including air leakage testing, keep defect rates at or below 3 percent. CE certification and UL listing are secured.

Models are normally shipped with a detailed user guidebook or manual. Manufacturers can also offer direct training on machine handling and troubleshooting. For buyers that are willing to visit their suppliers, the sessions are conducted on factory grounds.

A few companies, however, are able to send staff abroad to help clients operate the equipment. QC specialists are dispatched as well for regular maintenance and repair assistance.

Large enterprises provide aftersales service via overseas offices. Pricewise, makers offer rates 40 to 50 percent lower than most of their foreign rivals.

Tire changers with a 10 to 20in external and 12 to 22in internal clamping diameter range between $300 and $2,000.

Models for farm and industrial vehicles, trucks and buses are priced at $1,500 to $2,500. Most are designed to hold 14 to 40in rims.

Wheel aligners go for $5,000 to $15,000, while balancers start at $300 and reach $3,000.

Quotes have dropped at least 5 percent in response to the decline in materials spending during 2H08.

Although metal costs are fluctuating, companies intend to hold prices in coming months to avoid losing orders.