Understand The Sprocket
Sprocket Applications: Widely used in chemical industry, textile machinery, food processing, instrumentation, machinery and other industries.
Sprocket parameters formula:
Indexing circle diameter: d = p / sin 180 ° / z p = pitch can be found in the table z = number of teeth
Front circle (outer diameter): D = p × (0.54 + cot180 ° / z)
3/8 = 9.525 1/2 = 12.7 5/8 = 15.875 3/4 = 19.05
\ 3 points 4 points 5 points 6 points
Diameter circle: d = p / sin (180 ° / z)
Tip diameter: dmax = d + 1.25p-d1
Dmin = d + (1-1.6 / z) p-d1
Dedendum diameter: df = d-d1
Note: p chain pitch
Z sprocket number of teeth
D1 Chain roller diameter
Sprockets Model: Contains non-standard sprockets (customized according to customer drawings), standard sprockets (American standard and metric).
Sprocket commonly used materials: C45
Common sprocket processing methods are: quenching, surface blackening treatment
The general principle of selection of sprocket teeth:
19 or more
Generally used for high-speed, active sprocket normal working condition.
Applies only to small pitch sprockets.
23 teeth or more than 23 teeth
Recommended for use in collision situations. When the speed is relatively low, with a large number of sprocket Gears can greatly reduce the chain rotation, the chain of tensile load and bearing load.
Structure Design of Roller Sprocket
1. Sprocket tooth shape
The profile of the sprocket must ensure smooth and smooth engagement of the chain energy, minimizes the effects of meshing and contact stress and is also easy to machine.
Sprocket material should ensure that there is sufficient strength and wear resistance, so the sprocket tooth surface are generally heat treatment, to reach a certain hardness.