Ernest Bennett have been manufacturing wide bandsaw blades for over 50 years and we pride ourselves on the quality and service we give to our customers. In order to give the best product to our customers we offer our bandsaws in a choice of 3 types of steel, all supplied from the Bohler Uddeholm group, renowned as being the best steel for bandsaws in the world. Uddeholm have been the leaders in bandsaw strip technology since 1886 and Ernest Bennett is now their largest customer in the UK with purchases of over 60 tonnes of steel per year.
The benchmark for bandsaw steel is Uddeholm‘s 148 grade, or "UDDEHOLM 000" as it is better known. This is the steel most suitable for swaged bandsaws as it is tough enough to allow the teeth to be swaged without cracking and breaking and is also suitable for tipping. Swaging in particular makes very exacting demands on the toughness of bandsaw blades. The steels toughness, or ductility are more important than its hardness. The bandsaw steel must also have good resistance to wear if the life of the teeth is to be prolonged. Since resistance to wear is dependent on hardness the steel should be as hard as possible, but not too hard so as to become brittle and unable to withstand swaging. Because wood band saw blades are subject to severe impact stresses while in use the steel must have good impact resistance. The steel must also have good resistance to fatigue as the saw blade must withstand repeated bending and straightening over the bandsaw wheels. The steel must also have good straightness and flatness, combined with good elasticity and resilience. Uddeholm 000 is the best steel for meeting all of these demands.
However, Uddeholm 000 is not the only steel available from the Bohler Uddeholm group. With the development of tipped bandsaws some of the characteristics of Uddeholm 000 are not required and we move to "Uddeholm 170". This steel has a higher hardness and tensile strength, which allows it to hold tension longer and cut more accurately. With the stellite tips it allows the saw blade to run for up to 4 times longer on the bandsaw machine giving much better productivity in a high precision, high speed mill. With the higher hardness however this grade of steel is not suitable for swaged saw blades.
The third Bohler Uddeholm steel we supply is Martin Miller steel. This is an admirable alternative to Uddeholm 000, but at a slightly lower price. Martin Miller joined the Bohler Uddeholm group in 1997, but was founded in 1782 and started producing saw steel in 1869. It does not have the well known name of Uddeholm but is part of the same group and produces excellent quality steel.
Ernest Bennett use the latest technology for producing, servicing and sharpening band saw blades. The teeth are pressed out using a CNC controlled press feed and cut-to-length line, ensuring accuracy of pitch and position of the weld. The welded joint is tempered to 460 deg C to prevent cracking on the weld. The saw blades are then tensioned on automatic machinery before a manual inspection of the joint and the back edge. We then use Mig tipping machines to melt the stellite tip on to the teeth which gives a better adhesion to the saw blade to reduce tip failure and reduce the porosity of the stellite. The saw blades are then ground on CNC wet grinding machines before a final inspection and being packaged for dispatch to the customer. Bandsaw operators should be aware that a bandsaw blade has a tendency to stretch during the first time of use and it is for this reason that it is recommended a new saw blade should be run in on the machine the first time it is used to prevent damage to the bandsaws. Our recommendation is to run the saw blades without cutting for half an hour, then light cutting for 2 hours and then have the saw serviced. It is also recommended to follow the bandsaw machine manufacturers maintenance schedule in order to prevent damage to the bandsaws blade. For your information we have listed our recommendations below in our troubleshooting and maintenance guides.
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