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1400g raw cartridge [6] eMTB, heavy cargo, commuter Kindernay: VII 2021 7 428% [7] 160 Nm [7] 1200g raw cartridge, 1750g total system weight including SWAP and Hyseq Onesie [7] eMTB, heavy cargo, commuter Rohloff AG: Speedhub 500/14: 1998 14 526% 130 Nm 11th gear 1700-1825 g [8] Sport/Touring/ Cargo/Tandem Shimano Alfine Di2 SG-S7001-11 (SG ...
A face gear set typically consists of a disk-shaped gear, grooved on at least one face, in combination with a spur, helical, or conical pinion. A face gear has a planar pitch surface and a planar root surface, both of which are perpendicular to the axis of rotation. [ 1 ]
For bicycles with 700c wheels, some cyclists quote gear inches based on a nominal wheel diameter of 27 inches, corresponding to the old British tire size of 27 x 1 + 1 ⁄ 4" (ETRTO 630). Strictly speaking, the rolling diameter of a 700c wheel may be significantly higher or lower than 27", depending on the tire size, e.g. nearly 27.5" for a ...
One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...
Meshing of two spur gears with involute external teeth. z 1 = 20, z 2 = 50, α = 20°, x 1 = x 2 = 0, ISO 53:1998. The lower (green) gear is the driving one. The line of contact, which is the locus of all teeth contact points, is shown in blue.
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Broaching can also be used to produce gear teeth and is particularly applicable to internal teeth. The process is rapid and produces fine surface finish with high dimensional accuracy. However, because broaches are expensive and a separate broach is required for each size of gear, this method is suitable mainly for high-quality production.
The Dana 53 first appeared in the late 1940s and is much like a Dana 60. Although all Dana 53s are semi-floating, rear axles, 9.25" ring gear diameter. It was used as OEM in 1960s full-size (C-body) Chrysler passenger cars equipped with the 440 CID engine. The Dana 53 was phased out in the late 1960s, replaced by the Dana 60.
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