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Rack and pinion 
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rack

The rack is a special gear with teeth distributed on the bar. The rack is also divided into straight rack and bevel rack, respectively, with the spur gear and helical cylindrical gear paired use; rack tooth profile straight rather than involute (for the tooth surface is plane) , When the pitch circle radius infinite cylinder gear.

advisory

The rack is a special gear with teeth distributed on the bar. The rack is also divided into straight rack and bevel rack, respectively, with the spur gear and helical cylindrical gear paired use; rack tooth profile straight rather than involute (for the tooth surface is plane) , When the pitch circle radius infinite cylinder gear.

Main features: 1.Because the rack tooth profile is a straight line, each point on the tooth profile has the same pressure angle and is equal to the tooth profile angle of inclination, which is called tooth profile angle, the standard value is 20 °. 2. The straight line with the top line parallel to the same pitch and modulus. 3. Parallel to the tooth top line and tooth thickness equal to the width of the tooth line is called the index line (center line), which is the basis for calculating the size of the rack.


Specifications

Specifications: 25x20x1008.87

Modulus: 1.5m

Number of teeth: Z = 200

Pressure angle: a = 20 degrees

Addendum high coefficient: ha = 1

Tooth type: Right-hand angle 190 31 '42 "

Accuracy: GB 7

Production process: fine grinding on all sides inserted

Hardness treatment: tempered HB20-25 degrees


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