Difficulty Machining Large Cast Parts

Large cast parts represent a challenge for many machinists. 


Obviously the first challenge when dealing with nay large machining is simply having the right machines in order to carry out the work. Not only will a machinist need a machine with a larger capacity, they will also need the right cranes and jigging in order to support larger parts in a safe and efficient manner. 


Cast Parts can be more difficult to machine than other metals and understanding the machine set up for Grey Cast Iron against say White Iron is not something every machinists will possess. This can lead to longer machining times and rapid tool wear which will increase the costs of any job. Every type and grade of cast material is unique and should be treat as such.


There will often be an amount of variety between different castings of the same component. This may lead to extra programming and machining times, especially if you are working on a component where tight tolerances are required. Pre-inspection and measurement is key in reducing this, but moving large cast parts between the machine and inspection can be time consuming.


Cast parts are used across a diverse range of industries, and can be produced in a number of ways. Quite often they will be used in association with Valve, Pump and Oil components and will require machining to tight tolerances and often have complicated geometries. This level of complexity puts large cast parts 'out of the reach' of many machinists, especially ones not used to working on large surfaces. 


The last and perhaps biggest reason why machinists may struggle with large cast components is simply that the cost of making a mistake can be so high it isn't worth taking the risk. Castings have already had a large amount of hours and work go into them and machining will often be the last process in manufacture. As such scrapping a large cast parts can have a high cost, scaring away those unfamiliar with them. 

Bronte Precision

Machining of large cast parts is exactly the sort of niche that Bronte precision work in. We have set up our shop floor to accommodate large and complicated jobs where tight tolerances and a high level of machining are required. Our two CME Universal Bedmills can machine parts up to 2000 x 1000 x 1000mm, which both have cranes allowing us to safely load larger and heavier parts. As a sub-contract machinist we are well versed in working with a variety of materials including cast iron, cast aluminium and more. We already work alongside a number of forging and casting businesses and our staff are experienced in working with large machining. We are based in Bradford and most competitive in small to medium volumes.