![]() ![]() Stainless steel sprockets are another popular option, especially for food processing or elevated temperature applications where stainless steel chain is used. ![]() Challenge already offer a range of forged sprockets for the agricultural markets. Forged sprockets are hard wearing and accurate, but the pattern production costs are prohibitive if they are not manufactured in large quantities. For high volume production, sprockets can be forged. Numerous material options are also available depending upon quantities and the sprockets application. Machine cut sprockets are most advantages when used in very high load or high speed applications where a slight variation in tooth position can cause uneven distribution of high loads or miss-gearing at high speed. Sprockets can also be offered with a machine cut tooth profile which increases the sprockets cost, but increases the tooth profiles accuracy. The sprocket bore is then machined and the teeth are hardened if requested. Tooth hardening such as flame or induction hardening.Īs standard, sprockets are profile cut from EN8/C45 medium carbon steel plate with a boss welded on one side.Tooth profile, such as dirt relief, root relief and increased clearance.Bore details, such as plain bore, bored and keyed, splined, bronze bushed to name a few.Boss size and location, for example a boss on one side, bosses on both sides, offset bosses, bearing inserts, taper bushes etc.Due to the large range of customer requirements, we manufacture sprockets to order. Challenge offer a full range of standard welded and integral attachments, such as A, K, G, L, M and F types although we are also able to offer many bespoke attachment types as well.Īlong with our range of attachments, we can also offer other features such as welded pins, anti-backbend modifications, plastic or steel wear pads, side bow, top cover plates and numerous other features.Ĭhallenge manufacture a range of sprockets to suit all of our chains. If the chain does not have hollow or extended pins, then an attachment of some kind is generally required to attach other furniture to the chain, such as buckets or slats. Due to the large safety factors involved, increasing the breaking load is actually detrimental from a machine operators point of view as the increase in breaking load is often achieved by reducing the size of the pins and bushes, which in turn increases the bearing pressures and reduces the chains wear life.Įvery palm oil chain manufactured by Challenge is specifically designed to maximise the chains operational wear life whilst also being durable. Breaking load is only relevant during the original machines design stages. It should be noted that some chain manufacturers tend to discuss breaking load rather than wear resistance. Machined bushes are more expensive, but this is often offset by the increase in the chains wear life. Using precision machined bushes over those that are rolled or curled ensures that there is minimal movement in heat treatment due to distribution of the hoop stress, but also removes the joining 'lip' which can cause premature wear to both the roller and the chain pin. Strict tolerances on component surface hardness ensures that one component is not prematurely worn by the other, which helps evenly distribute wear over an extended period of time. This increases mating face area, reduces bearing pressures and helps prevent contamination from external sources. This ensures a smooth mating surface and decreasing surface friction. Grinding components after heat treatment. Replacing sprockets ensures that the sprockets wear with the chain, rather than rapidly wearing and damaging the chain to suit the old sprockets.Ĭonveyor chain manufacturers can also assist with increasing chain life and decreasing chain wear by Replacement of sprockets whenever a new chain is fitted. This reduces the friction between the pin and the bush. The largest contributing factors to an increase in chain wear life are There are numerous factors that can increase the wear life of a chain. As wear in conveyor chain is a measurement of the increase in length, it follows that the wear occurs between the chains pin and bush whenever the chain articulates, such as wrapping around a sprocket. In conveyor chain, wear is measured by the amount of elongation over a given number of pitches where this should not exceed a 2% increase from the chains initial length, over the given number of pitches, before it is replaced. Solid Pin Palm Oil Chain As with all moving mechanical parts, wear on components will always occur where there is contact between them. ![]()
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