ISO Tolerance zone Calculator

ISO Tolerance zone calculator Usage

The calculator application page is divided into 3 windows

1. Calculator window
   Basic size calculations and results
2. Reference table window
   Selection of range and tolerance
3. Filter for the tolerances displayed in the table window
   Selection of the tolerances displayed in the reference table

 

Basic usage flow

1. Enter basic dimension into the top most text field
2. Find appropriate range; Click find range button or step through the ranges using next and previous range button in the reference table window
3. select Hole and Shaft class using radio buttons to the left and right in "reference table window"
4. if the tolerance does not appear in the "reference table window". use filter window to make it visible
5. Click "Calculate" button for results

 

The calculator windows

1. Unit selection: mm or inch
   - All calculations are in millimeters internally. The inch selection is for convenience only
2. Decimal precision selection 3, 4, 5
   - Number of digits after the decimal point for all dimension


3. Center text field
   - Basic dimension to which tolerances will be applied
4. Find range button
   - Automatically find the appropriate range in the reference table window
5. Calculate button
   - Apply selected tolerances to the basic dimension
   - Results are displayed below the "Calculated Hole dimension" and " Calculated Shaft dimension" labels
6. "From: To:" ranges
   - Left "From: To:" displays which range the selected Hole class was selected from
   - Right "From: To:" displays which range the selected Shaft class was selected from
7. C (Clear) buttons on each side of calculator windows
   - Left "C" button clears the selected Hole tolerance
   - Right "C" button clears the selected Shaft tolerance
8. Calculated Hole dimension
   - Displays the resulting dimensions of the basic size with the selected Hole tolerance applied
   - If the Hole class was selected from an inappropriate table. A "Warning: incorrect range" message will appear below the result
9. Calculated Shaft dimension
   - Displays the resulting dimensions of the basic size with the selected Shaft tolerance applied
   - If the Shaft class was selected from an inappropriate table. A "Warning: incorrect range" message will appear below the result
10. Scale width (above red and blue bars)
    - Display the total width of the scale of the selected Hole/Shaft tolerances in the selected unit (mm or inch)
11. Red and Blue bar scale with zero line
    - Graphical representation of the selected Hole or/and Shaft tolerances
    - the vertical black line in the center represent the Basic size (The Zero Line)
    - the hatched Red horizontal bar represents the Hole tolerance relative to the Zero line
    - the more shifted to the left the Red bar is, the bigger the Hole
    - the hatched Blue horizontal bar represents the Shaft tolerance relative to the Zero line
    - the more shifted to the right the Blue bar is, the smaller the Shaft

 

ISO Tolerance Zone Table & Selection window

• - List of tolerance classes that have been checked in the lower filter window
• - Buttons are used to step forward and backward between available range span for class
  - Range spans are "From: 0.0 to: 1.0" to "From: 450.0 to: 500.0"
• - Smaller buttons are used to move to the beginning and end of available range spans
• - The red and blue bars at the centre show a proportional view of the tolerances relative to each other
• - The vertical black line in the center is the Zero line (The basic size)
• - The radio buttons on each side are used to select the classes for the Calculator
  - Only one class can be selected per side

 

Table filter by class window

• - Update to the Table window only happens after clicking the "Apply Filter" button
• - The checkboxes in this window determine if particular class or classes will appear in the Table list window
  - checked items appear in the list window, unchecked items do not
• -The classes are separated into 3 groups
  - Matched: Tolerance classes that have both a Hole and Shaft Class
  - Unmatched: Tolerances that only have a Hole or Shaft tolerance
  - Other: Less commonly used tolerance classes
• - The "Check All" and "Uncheck All" bottom link only apply to the group they are part of
• - To reset the selected classes to the sites default click "Check site Default" link
• - "Save as My Default" Saves the current selection to a browser cookie and will be reapplied the next time you visit this page
• - to reset the selected classes to your browser cookie defaults, click link "Check My Defaults"

 

Revision

• Fixed J6 tolerance 0.018 was 0.180, 07/03/2017