Technical Glass Products, Inc. (TGP)
Technical Glass Products, Inc. (TGP)
SYMBOL CHARACTERISTICS |
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SYMBOL |
CHARACTERISTIC |
STANDARD TOLERANCE |
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Flatness | .005″ |
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Straightness | .005″ |
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Circularity (Roundness) | .010″ |
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Cylindricity | .010″ |
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Perpendicularity (Squareness) | 1° |
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Angularity | 1° |
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Parallelism | .005″ |
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Profile of a Surface | .030″ |
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Profile of a Line | .020″ |
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Circular Runout | .010″ |
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Total Runout | .010″ |
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Position | .020″ |
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Concentricity | .010″ |
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Symmetry | .010″ |
NOTE: These tolerances apply to machined ground only and mechanically polished parts only. |
Tolerances |
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TOLERANCE BLOCK: |
INCHES |
MILLIMETERS (mm) |
x. | = ±.040 | = ±1 mm |
.x | = ±.030 | = ±.75 mm |
.xx | = ±.010 | = ±.25 mm |
.xxx | = ±.005 | = ±.13 mm |
ANGLE | = ± 1° | = ± 1° |
On inside sharp corners, R.125 preferred. EXAMPLE: Rectangular holes and corner contours. |
STANDARD SURFACE FINISHES (MICRO INCH)SURFACE QUALITY–MIL SPEC.–PRF-13830B 80/50 |
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N6 | 32√D | 32 Ra (μ in) | Diamond finish |
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N5 | 16√D | 16 Ra (μ in) | Diamond finish |
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N4 | 9√G | 9 Ra (μ in) | Ground finish |
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N2 | 2√MP | 2 Ra (μ in) | Ground & Polish finish |
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N2 | 2√FP | 2 Ra (μ in) | Flame Polish finish |