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Table 1 Design specifications of the existing pinion

From: Effects of pressure angle and tip relief on the life of speed increasing gearbox: a case study

Number of teeth (z)

Pinion

24

Center distance (a)

 

485.00 mm

Gear

94

Tip diameter (da)

 

219.52 mm

Normal module(Mn)

8 mm

Addendum modification co-efficient (x)

Pinion

0.56 mm

Pressure angle (α)

20°

Gear

0.18 mm

Helix angle (β)

10°

Root diameter (df)

184.00 mm

Face width (b)

245 mm

Addendum (ha)

12.278 mm

Hand of helix

Right

Dedendum (hf)

5.481 mm

Reference diameter (d)

194.96 mm

Effective chordal tooth thickness

15.744/15.694

Base diameter (db)

182.872 mm

Total contact ratio

2.948

Tooth quality (Q-DIN3961)

6

Tip relief ( Ca)

0.002 mm