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Sprocket Blank Diameter Calculator (Version 02 - 09/09/2008) Author: Douglas Anderson

This document provides a sprocket blank diameter calculator. It includes the pitch, number of teeth, and calculated outer diameter of a sprocket with a pitch of 19.05mm and 24 teeth (156.13mm). It also lists the internal diameters for different chain types, including 530 chain (132.63mm). Tables provide specifications for various chain types, pitches, roller diameters, widths, and sprocket thicknesses. Notes provide the height of a 530 chain link and guidelines for adding/subtracting from sprocket diameters for different chain sizes.

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112 views5 pages

Sprocket Blank Diameter Calculator (Version 02 - 09/09/2008) Author: Douglas Anderson

This document provides a sprocket blank diameter calculator. It includes the pitch, number of teeth, and calculated outer diameter of a sprocket with a pitch of 19.05mm and 24 teeth (156.13mm). It also lists the internal diameters for different chain types, including 530 chain (132.63mm). Tables provide specifications for various chain types, pitches, roller diameters, widths, and sprocket thicknesses. Notes provide the height of a 530 chain link and guidelines for adding/subtracting from sprocket diameters for different chain sizes.

Uploaded by

Ashok
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Sprocket Blank diameter calculator (Version 02 - 09/09/2008)

Author: Douglas Anderson

Pitch (P) 19.05 mm


teeth (N) 24 teeth
Sprocket OD P*(0.6+(1/Tan(180/N)))= 156.13 mm
Chain internal running diameter (530) 132.63 mm
Chain internal running diameter (420,425) n/a mm

Chain Type 420 425 428


Pitch (inches) 1/2" 1/2" 1/2"
Pitch (mm) 12.7 12.7 12.7
Roller Diameter (inches) 5/16" 5/16" 0.335"
Roller Diameter (mm) 7.9375 7.9375 8.509
Roller Width 1/4" 5/16" 5/16"
Sprocket Thickness 0.227" 0.284" 0.284"

Notes:
530 chain link height 15.30mm

Sierra 7" LSD diameter of top of sprocket flange 160mm


For size over chain add approximately 10mm to diameter (530 chain)
530 chain deduct 23.50mm from sprocket OD for internal chain diameter
420 and 425 deduct 20mm from sprocket OD for internal chain diameter
520 525 530 630
5/8" 5/8" 5/8" 3/4"
15.875 15.875 15.875 19.05
0.400" 0.400" 0.400" 15/32"
10.16 10.16 10.16 11.906
1/4" 5/16" 3/8" 3/8"
0.227" 0.284" 0.343" 0.343"

ain diameter
in diameter
Westgarage Engineering Services
Westhouse
Cowstrandburn
Dunfermline
Fife, Scotland
KY12 9HP
UK

Author: Douglas Anderson


e-mail: douglas @westgarage.co.uk
Web: http://www.westgarage.co.uk

Sprocket Blank diameter calculator (Version 01 - 16/11/2007)


This spreadsheet is "Freeware" please credit Westgarage Engineering Services.

Notes:
Refer to the table in cells B14:I18 for your chains pitch
Input your chains pitch in cell B6 (convert from inches to mm)
Input the number of teeth required for your sprocket in cell B7
The overall diameter of your sprocket is calculated and shown in cell C8

Warning:
This spreadsheet is not in SI units! (You may need to convert to SI units for your documentation).
Errors and omissions excepted
documentation).

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