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cylinder heads and blocks

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Product Summary

Both cylinder heads and blocks are the part of cylinder which is the central working part of a reciprocating engine or pump, the space in which a piston travels.


On the one hand, the cylinder head is sometimes connected to the barrel with a sort of a simple lock (for simple cylinders). In general however the connection is screwed or flanged. Flange connections are the best, but also the most expensive. A flange has to be welded to the pipe before machining. The advantage is that the connection is bolted and always simple to remove. For larger cylinder sizes, the disconnection of a screw with a diameter of 300 to 600 mm is a huge problem as well as the alignment during mounting.

On the other hand, the cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine. Some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase). The term engine block is often used synonymously with "cylinder block" (although technically distinctions can be made between en bloc cylinders as a discrete unit versus engine block designs with yet more integration that comprises the crankcase as well). Finally, cylinder heads and blocks are important parts of cylinder.

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