Which bar length to enter
L is the distance between roller centres, not overall bar length or the gap between roller edges. Use your actual bar's centre distance. Height uses H = L · sin α; the inverse calculation uses α = arcsin(H/L).
Sine bar calculator
Calculate sine bar gauge block height from the angle and roller centre distance, or find the angle from measured height. Includes a setup example.
Sine bar
1What do you want to calculate?
2Enter the measurements
3Result
Click a dimension to copy it
Suggested gauge block stack· 87-piece metric set, always in mm
20+3.5+1.38+1.002= 25.882 mm
How to use this calculation
To tilt a sine bar, raise one roller on a gauge block stack. Required height depends on roller centre distance and the target angle. You can also calculate the angle of an existing setup by entering its measured stack height.
Worked example
Known measurements
Roller centre distance L = 100 mm · angle = 15°
Result
Stack height H ≈ 25.882 mm
A 200 mm bar at the same angle needs twice the height, approximately 51.764 mm.
Preparing the block stack
The calculator suggests a combination that approximates the required height. Check that its sizes exist in your gauge block set and review the difference between stack sum and target height. Display rounding does not replace checking the assembled stack.
Checking the supports
Clean contact surfaces and confirm that both rollers seat on their intended references. In the inverse calculation, H must be less than L for angles below 90°. The calculator describes geometry; actual stability and accuracy depend on the setup.
Frequently asked questions
Do I use overall bar length?
No. Enter the centre-to-centre distance between the two rollers, which is the reference length for this calculation.
Can I find the angle from the blocks?
Yes. Choose angle calculation and enter L and height H. The result is α = arcsin(H/L).
Will the suggested stack fit every block set?
Not necessarily. Check your available blocks and the combination's deviation before using it.
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