Spur Gear Drawing

The gear ratio is the ratio of the number of teeth in the gear to the number of teeth in the pinion, the pinion being the smaller of the two gears in mesh.

The pitch-circle diameters of a pair of gears are the diameters of cylinders co-axial with the gears which will roll together without slip. The pitch circles are imaginary friction discs, and they touch at the pitch point.

The base circle is the circle from which the involute is generated.

The root diameter is the diameter at the base of the tooth.

The centre distance is the sum of the pitch-circle radii of the two gears in mesh.

The addendum is the radial depth of the tooth from the pitch circle to the tooth tip.

The dedendum is the radial depth of the tooth from the pitch circle to the root of the tooth.

The clearance is the algebraic difference between the addendum and the dedendum.

The whole depth of the tooth is the sum of the addendum and the dedendum.

The circular pitch is the distance from a point on one tooth to the corresponding point on the next tooth, measured round the pitch-circle circumference.

The tooth width is the length of arc from one side of the tooth to the other, measured round the pitch-circle circumference.

The module is the pitch-circle diameter divided by the number of teeth.

Pinion Engineering Drawing

Fig. 24.15 Spur-gear terms

Spur Gear Drawing Convention

Fig. 24.16 Gear conventions

Fig. 24.15 Spur-gear terms

Fig. 24.16 Gear conventions

The diametral pitch is the reciprocal of the module, i.e. the number of teeth divided by the pitch-circle diameter.

The line of action is the common tangent to the base circles, and the path of contact is that part of the line of action where contact takes place between the teeth.

The pressure angle is the angle formed between the common tangent and the line of action.

The fillet is the rounded portion at the bottom of the tooth space.

The various terms are illustrated in Fig. 24.15.

Was this article helpful?

0 0
Pencil Drawing Beginners Guide

Pencil Drawing Beginners Guide

Easy Step-By-Step Lessons How Would You Like To Teach Yourself Some Of The Powerful Basic Techniques Of Pencil Drawing With Our Step-by-Step Tutorial. Learn the ABC of Pencil Drawing From the Experts.

Get My Free Ebook


Responses

  • Louise
    What is a fillet on a base circle?
    9 years ago
  • gorbulas
    Where is diametral pitch in spur gear drawing?
    7 years ago
  • leon
    How draw a spur gear step by step?
    4 years ago
  • Marina
    How to Spur Gear in Engg drawing by Hand?
    4 years ago
  • Safa
    How to drawing gear engginering drawing?
    3 years ago
  • CONNER ROBERTSON
    When a gear and a pinion are in mesh how is this drawn?
    3 years ago
  • Elisa
    How to draw a gear step by joshuanava engineering drawing?
    3 years ago
  • sam
    Is convention of spur gear?
    3 years ago
  • joel simola
    How to draw spur gear by hand?
    3 years ago
  • TOBY
    How to draw spur gear in sheets?
    3 years ago
  • LEEVI
    How to draw a spur gear in mesh with a pinion?
    3 years ago
  • Angelica
    How to make spear gear stap by stap in drawing sheet?
    3 years ago
  • mildred
    How to produce 3 teeth spur gear in engineering drawing?
    3 years ago
  • John Williams
    How to draw teeth on mesh gears?
    3 years ago
  • Brad
    How to draw a convectional spur gear?
    3 years ago
  • Yolanda
    How to construct gears on engineering drawing?
    3 years ago
  • Anke
    How to draw gear teeth by hand?
    3 years ago
  • shukornia
    How to draw spur gear in pencil by hand?
    3 years ago
  • deodato
    How to draw gear step by step with dedundum and addendum?
    3 years ago
  • meaza
    How to construct an involute spur gear free hand drawing?
    3 years ago
  • daniel
    What Is Sketches Of Dedendum?
    3 years ago
  • belisarius zaragamba
    What are the steps in gear construction?
    3 years ago
  • Manuela
    How to draw two gears in mesh in technical drawing?
    3 years ago
  • Enrico
    How to Spur gears in engineering drawing?
    3 years ago
  • costantino trevisani
    How to scale a spur gear tooth drawing?
    3 years ago
  • tom
    How to draw a spear gear?
    3 years ago
  • IDA
    How to make a rack and pinion gear engineering drawing?
    3 years ago
  • Sofia
    How to construct a gear in engineering drawing?
    3 years ago
  • mathias
    How to draw a pair of involute spur gear?
    3 years ago
  • noemi
    How to draw spur gears in mesh?
    3 years ago
  • iida
    How to draw spuf gear?
    3 years ago
  • teodros futsum
    How to draw a spur gear with the information of pinion and gears?
    3 years ago
  • miikka
    How do you draw spur gear mashes pinion?
    3 years ago
  • David
    How to draw 5 teeth of an involute spur gear?
    3 years ago
  • ameera cameron
    How to construct two mesh gear?
    3 years ago
  • dinodas
    How to draw spur gear tech pen?
    3 years ago
  • hanna
    How to draw a spur graph?
    3 years ago
  • Victor
    How to draw gears by hand?
    3 years ago
  • proserpina
    How to draw a spur gear in orthographic view?
    3 years ago
  • faryl allan
    How to draw single spur gears?
    2 years ago
  • Baillie
    How draw meshing gears in engineering?
    2 years ago
  • demet
    How to draw spur gear in technical drawing?
    2 years ago
  • larry
    How to make spur gear drawing?
    2 years ago
  • Kisanet
    How to constust spur and pinion?
    2 years ago
  • venera
    How to draw spur gear in mechanical drawing?
    2 years ago
  • Calimero Toscani
    How to sketcha spur gear?
    2 years ago
  • bandobras
    How to draw involute bevel gear in engineering drawing?
    2 years ago
  • ashlyn
    How to draw a gear tooth profile manually?
    2 years ago
  • Selassie
    What are the ways to draw the involute spur gear?
    2 years ago
  • yvonne
    How to construct gear teeth in engineering drawing?
    2 years ago
  • edwin
    How to construct /draw a meshing gear?
    2 years ago
  • gorbaduc
    How to use engineering drawing a gear tooth profile?
    2 years ago
  • Eshan
    Is convention of assembly for spur gear?
    2 years ago
  • piper
    How to make gear drawing adendem and didem dia?
    2 years ago
  • kenzie
    How to draw spur gears by hand?
    2 years ago
  • Henri
    How to draw spur gear engineering drawing?
    2 years ago
  • Ciro
    How to construct a two meshing gear with pencil?
    2 years ago
  • Giada
    How to draw detailed spur gear drawing?
    2 years ago
  • cirillo piazza
    How to draw gears in engineering drawing?
    2 years ago
  • gerard
    How to construct a spur gear in tecknicaldrawing?
    2 years ago
  • tewelde
    How to construct spurt gear?
    2 years ago
  • benjamin fink
    How to draw teeth in engineering drawing?
    2 years ago
  • licia
    How to draw a spur gear tooth?
    2 years ago
  • Yorda Haylom
    How to draw the pitch circle of a gear?
    2 years ago
  • duenna gaukrogers
    HOW TO KNOW THE ORTHOGRAPHIC VIEW OF MATING GEARS?
    2 years ago
  • Celeste
    How to draw types of gear wheels pencil drawing?
    2 years ago
  • valentin
    How to draw a spur gear on paper?
    2 years ago
  • Cornelio
    How to construct an involute teeth gear with compass?
    2 years ago
  • Enrico
    How to construct spur gear tooth in Engineering drawing?
    2 years ago
  • helen
    How to determine addendum circle and dedendum circle engineering drawing mechanical engineering?
    2 years ago
  • Yonatan Welde
    How to draw a pinion meshes with a gear n4 draughting?
    2 years ago
  • Grace
    How to draw spur gear in technical drawings?
    2 years ago
  • PEREGRIN
    How to draw a spur gear tooth profile?
    2 years ago
  • YRJ
    How to draw a spiur gear in mechanical engineering?
    2 years ago
  • Arvi
    How to draw rack forba involute gear eng drawing?
    2 years ago
  • ruggero
    How to drawthe spur gear?
    2 years ago
  • Ryan
    How to construct the teeth of two gears meshing?
    2 years ago
  • cassio mazzanti
    How to make tangent in technical drawing?
    1 year ago
  • ernest
    How to draw gears in mesh engineering drawing of different ratios?
    1 year ago
  • teppo
    How to construct a mesh spur gear?
    1 year ago
  • Irene
    How to draw a tooth in gears in mesh engineering drawing?
    1 year ago
  • norman
    How to draw spur gears in engineering?
    1 year ago
  • millar murphy
    How to draw meshed gears on paper?
    1 year ago
  • esmeralda
    How to draw broken spur gear with 33 teeth?
    1 year ago
  • reuben
    How to notate gears technical drawings?
    1 year ago
  • regan
    How to draw gears in techinical drawing?
    1 year ago
  • Ralf
    How to draw spur gear of the sun gear meshing with the pinion?
    1 year ago
  • ARTTU
    How to make a technical drawing of a gear?
    1 year ago
  • Thorsten
    How to comic draw gear?
    1 year ago
  • claudia
    How to draw a spur gear with module?
    1 year ago
  • demsas
    What is the root diameter for a 24 pitch 10 tooth gear?
    1 year ago
  • armas
    How do you draw 6 gears in a circular pattern that touch?
    1 year ago
  • Damiana
    How to construct a gear in technical drawing?
    1 year ago
  • SEMOLINA SMALLBURROW
    When drawing a spur gear, the diameters that must be tangent are?
    1 year ago
  • RITVA
    How is teeth represent in mechanical drawing?
    1 year ago
  • tiffany
    How to draw mechanical gear on papper?
    1 year ago
  • averardo
    HOW TO DRAW SPUR GEAR IN THEORY?
    11 months ago
  • ellis
    How to draw gear assemblys?
    11 months ago
  • mandy
    How can draw spur grear?
    11 months ago
  • Ciriaco
    How to construct spur gears?
    9 months ago
  • ADELE FERRARI
    How to draw spur geat?
    8 months ago
  • Tesmi Luwam
    How to draw a doppler gear?
    7 months ago
  • aamos
    How to draw bevell gear by pecil?
    7 months ago
  • matthew
    How to draw involute gears manually?
    7 months ago
  • jennifer
    What is required on a gear drawing?
    7 months ago
  • gina
    How to draw spur gear tooth form?
    5 months ago
  • Cristina
    How to draw them in comics a spur gears?
    3 months ago
  • mario
    How to draw zaraganba?
    3 months ago
  • Ferdinand
    How is a gear represented in an engineering drawing?
    2 months ago
  • isaias
    How to draw mod 2 teeth on rack and pinion?
    2 months ago
  • renata
    How to construct a gear on engineering draw?
    1 month ago
  • Nasih Senay
    How to draw gear teeth step?
    1 month ago
  • kathy
    How to draw a gear free hand drawing?
    1 month ago
  • laura
    How to draw spur gear mating?
    21 days ago
  • Craig
    How two sketch 2 gears mating step by step?
    21 days ago

Post a comment