many motors from cast will have slightly different distance between the centre of cam position and the main caps, thats why some motors will sound. Higher rotational speeds and torques can be achieved with the helical toothing described below. if you where to line bore the block they can drop the bar down a bit to creat the centre of the main caps a bit lower thus giving your straight cuts more backlash. Spur gears are the simplest and therefore most cost-effective type cylindrical gears! Spur gears do not allow the transmission of excessive torques and speeds. Spur gears are therefore only suitable for low circumferential speeds. This leads to relatively high noise levels. But that is not why spur gears are popular for motorsport. That is true to some extent, the tooth is stronger, but it transmits axial thrust to the shaft that could cause failure. Since with spur gears the entire width of a tooth engages at the beginning of meshing, the force transmission also suddenly starts and abruptly breaks off at the end of meshing. PhilMcCrackin said: Helical gears are stronger than straight cut. Animation: Spur gear (enlarged animation) The more teeth are engaged at the same time, the lower the load for each tooth and the higher the power that can be transmitted. However, at least one tooth must always engage the mating gear to ensure continuous power transmission. Unit of the 5th SS Panzer Division Wiking, SS cut with straight button. With spur gears, up to three teeth mesh simultaneously with each other. World War Two / Waffen SS Panzer /German Panther Tank from the 5th SS Panzer. IIRC, early Panthers used helical-cut gears in the final drive. Such a toothing can be produced very cost-efficiently by gear hobbing, gear planing or gear shaping. The Tank vs Tank Battle filmed on Cologne dubbed Battle of Cologne depicts a m26. in the direction of the rotation axis, it is referred to as a spur gear or a straight-cut gear. If the teeth of a toothed gearwheel run in a straight line, i.e. Respon memang lebih direct dari helical, tapi ya kasar & berisik. Kalo mau diganti straight cut yg bisa² aja, tinggal siapin duit aja. In a spur gear, up to 3 teeth are in mesh at the same time. Tujuan mobil passenger umun dibikin helical kan biar smooth & less noise. Straight-cut gears (spur gears) are the simplest type of toothing.

Straight cut gears panther tank