machinery and equipment

Tips For Choosing Acme Screw Options

The production of Acme and lead screws is a complex procedure that requires several steps that must be done with complete precision. The specific thread pattern of the Acme screw allows for easy movement of the Acme nut along the thread pattern without any catching or wedging as the nut moves along the length of the thread. The Difference While the Acme screw falls under the general category of the trapezoidal thread form, it is different. The typical trapezoidal thread form has a 30-degree thread angle while the Acme thread is set at 29 degrees. This is measured at the top of each thread and between the next thread up or down the shaft. It is important to realize this 29-degree thread remains the same regardless of the diameter. In addition, the thread height is half of that of the pitch and the top and bottom or the crest and valley of the thread are flat, not rounded or pointed in shape. This specific thread shape is important, as it allows the thread to carry additional weight over other shapes. Both standard and split nuts can be used on this type of thread form. The split nut will open along the length to allow the nut to be placed on the bolt. It also provides the option to move the nut into position up or down the length of the thread without having to turn it into place. Considerations When choosing Acme screws options, it is important to choose a manufacturer offering precision machining and production options, particularly when the order calls for customized components. It is important to know the class of Acme screws you required as well as the diameter and length. Additionally, these screws can be configured with either a right or left-hand thread as well as single or multiple thread...

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Tips For Finding The Correct Tension Indicator For The Job

In all types of operations from paper manufacturing to films, steel or winding operations, there is the need to have the process carefully controlled. When precision in the tension on the material is critical, it will be essential to have a tension indicator that is accurate, dependable and rugged enough to stand up to demanding work environments. These devices are carefully designed to suit the specific equipment. The size, dimensions, and capacities of the different indicators will be important to compare, but it often the dependability and durability factors that are most considered factors after accuracy. In specialized processing where heat, humidity, and vibration are a concern, the durability factor is often the primary consideration. Analog or Digital There are two different types of tension indicator models. One is the analog model, which will provide a metered type readout on the indicator. This doesn’t mean a simple system and top models will offer features and functions such as tare adjustments, filtering, balancing and summing circuitry, tension monitoring options and controls, full meter scale adjustments and a stainless steel enclosure. Digital tension indicator units feature the same type of construction and features, but they utilize a digital readout that provides specific tension rather than the gauge type readout. With top manufacturers the indicator decimal point specification will be pre-set, allowing for the precision display required. Tension Range Measured Different applications will require a different range of tensions. For example, in the processing of plastic films, extremely precision tension control is required. Even slight variations can result in wrinkles or stretch of the plastic that can render the roll useless in specific types of packaging. These tension controls and indicator system need to be able to adjust to meet the requirements of the different plastics. Look for systems that offer adjustable tension load ranges that work for your current processing needs and those of the...

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