Hole Tolerance Calculator
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FIXED FASTENER TOLERANCE CALCULATION ASME Y14.5M-1994 APPENDIX B4 ENGINEERS NAME EXTENSION DATE JOB REF DRAWING N0. GRID DRAWING TITLE CLEARANCE HOLE PATTERN THREADED HOLE PATTERN 3 VALUES MUST BE ENTERED TO CALCULATE 4TH ENTER VALUE CALC VALUE 40/60 SPLIT CLEARANCE HOLE MIN Ø H 0.1840 0.1830 CLEARANCE CLEARANCE POS Ø 0.0110 0.0140 0.008 CLEARANCE THREAD MAX MAJOR Ø F 0.1640 0.1650 CLEARANCE THREAD POS Ø 0.0080 0.0090 0.012 CLEARANCE CONVERT +- TOLERANCE TO POSITIONAL DIAMETER IF X TOLERANCE RANGE = Y TOLERANCE RANGE X TOLERANCE RANGE Y TOLERANCE RANGE T1 T2
description
Tolerance Worksheet
Transcript of Hole Tolerance Calculator
FIXED FASTENER TOLERANCE CALCULATION
ASME Y14.5M-1994 APPENDIX B4
ENGINEERS NAME EXTENSION
DATE JOB REF
DRAWING N0. GRID DRAWING TITLECLEARANCE HOLE PATTERNTHREADED HOLE PATTERN
3 VALUES MUST BE ENTERED TO CALCULATE 4TH
ENTER VALUE CALC VALUE 40/60 SPLIT
CLEARANCE HOLE MIN Ø H 0.1840 0.1830 CLEARANCE
CLEARANCE POS Ø 0.0110 0.0140 0.008 CLEARANCE
THREAD MAX MAJOR Ø F 0.1640 0.1650 CLEARANCE
THREAD POS Ø 0.0080 0.0090 0.012 CLEARANCE
CONVERT +- TOLERANCE TO POSITIONAL DIAMETER
IF X TOLERANCE RANGE = Y TOLERANCE RANGE
X TOLERANCE RANGEY TOLERANCE RANGE
T1
T2
EQUIVALENT POSITIONAL Ø 0.0000
By: K. Tunmore
Warning: The information and formulae within the spreadsheet are based on tertiary sources, original research, particular assumptions and calculations. Some information or results may be incorrect. This spreadsheet, its information, and its calculations should only be used as a general reference. Always verify results. Use at your own risk!
FIXED FASTENER TOLERANCE CALCULATION
ASME Y14.5M-1994 APPENDIX B4
ENGINEERS NAME EXTENSION
DATE JOB REF
DRAWING N0. GRID DRAWING TITLECLEARANCE HOLE PATTERNTHREADED HOLE PATTERN
3 VALUES MUST BE ENTERED TO CALCULATE 4TH
ENTER VALUE CALC VALUE 40/60 SPLIT
CLEARANCE HOLE MIN Ø H 0.5300 0.5150 CLEARANCE
CLEARANCE POS Ø 0.0150 0.0300 0.012 CLEARANCE
THREAD MAX MAJOR Ø F 0.5000 0.5150 CLEARANCE
THREAD POS Ø 0.0150 0.018 CLEARANCE
CONVERT +- TOLERANCE TO POSITIONAL DIAMETER
IF X TOLERANCE RANGE = Y TOLERANCE RANGE
X TOLERANCE RANGEY TOLERANCE RANGE
T1
T2
EQUIVALENT POSITIONAL Ø 0.0000
To calculate a value for T2 - required positional tolerance of threaded hole - enter the 3 known values.
Same principle applies for calculating any one of the other tolerances given the remaining 3.
FIXED FASTENER TOLERANCE CALCULATION
ASME Y14.5M-1994 APPENDIX B4
ENGINEERS NAME EXTENSION
DATE JOB REF
DRAWING N0. GRID DRAWING TITLECLEARANCE HOLE PATTERNTHREADED HOLE PATTERN
3 VALUES MUST BE ENTERED TO CALCULATE 4TH
ENTER VALUE CALC VALUE 40/60 SPLIT
CLEARANCE HOLE MIN Ø H 0.5300 0.5000 CLEARANCE
CLEARANCE POS Ø 0.0300 0.012 CLEARANCE
THREAD MAX MAJOR Ø F 0.5000 0.5300 CLEARANCE
THREAD POS Ø 0.0300 0.018 CLEARANCE
CONVERT +- TOLERANCE TO POSITIONAL DIAMETER
IF X TOLERANCE RANGE = Y TOLERANCE RANGE
X TOLERANCE RANGEY TOLERANCE RANGE
T1
T2
EQUIVALENT POSITIONAL Ø 0.0000
To calculate values for T1 & T2 - required positional tolerances of holes with typical 60-40 split in favor of threaded hole - enter the 3 known values.
Greater positional tolerance is given to threaded holes as they do not benefit as much from MMC and because there is typically more tolerance build up in the process of machining tapped holes.
FIXED FASTENER TOLERANCE CALCULATION
ASME Y14.5M-1994 APPENDIX B4
ENGINEERS NAME EXTENSION
DATE JOB REF
DRAWING N0. GRID DRAWING TITLECLEARANCE HOLE PATTERNTHREADED HOLE PATTERN
3 VALUES MUST BE ENTERED TO CALCULATE 4TH
ENTER VALUE CALC VALUE 40/60 SPLIT
CLEARANCE HOLE MIN Ø H 0.5300 0.5560 INTERFERENCE
CLEARANCE POS Ø 0.0280 0.0020 0.012 INTERFERENCE
THREAD MAX MAJOR Ø F 0.5000 0.4740 INTERFERENCE
THREAD POS Ø 0.0280 0.0020 0.018 INTERFERENCE
CONVERT +- TOLERANCE TO POSITIONAL DIAMETER
IF X TOLERANCE RANGE = Y TOLERANCE RANGE
X TOLERANCE RANGE 0.02Y TOLERANCE RANGE 0.02
T1
T2
EQUIVALENT POSITIONAL Ø 0.0283
Convert 'square' +- tolerance zones to equivalent circular position tolerance. Enter total range of X and Y tolerance, not variation from nominal. Only works properly if X tolerance range = Y tolerance range.
To do a worst case interference check on existing parts/drawings enter all 4 values.
If interference is found it is indicated here. Amount of interference can be calculated by finding the difference between Entered and Calculated value for any of the 4 tolerances. In This case the potential interference at worst case is:
.556 - .530 = .026 .028 - .002 = .026 .500 - .474 = .026 .028 - .002 = .026
Convert 'square' +- tolerance zones to equivalent circular position tolerance. Enter total range of X and Y tolerance, not variation from nominal. Only works properly if X tolerance range = Y tolerance range.
