Trapezoidal thread - example results

 

  • Nominal sizes
  • Nominal sizes
  • Tolerances
  • Tolerances
Tr10 x 2 - 8c
external (bolt)
Trapezoidal thread - dimensions and basic profile
Name Symb. Value Unit Remarks
Nominal diameter 10 [mm] first choice
Pitch P 2 [mm] preferred
Lead Ph 2 [mm]
Number of starts 1 [-]
Thread angle α 30°
Flank angle β 15°
Tolerance class 8c [-]
Major diameter d 10,000 [mm] 9,820 ÷ 10,000
Pitch diameter d2 9,000 [mm] 8,614 ÷ 8,850
Minor diameter d3 7,500 [mm] 7,055 ÷ 7,500
Crest clearance ac 0,25 [mm]
Height of thread h3 1,25 [mm]
Radius R1max 0,125 [mm]
R2max 0,25 [mm]
Height H 3,732 [mm]
Height of the overlapping H1 1 2) [mm]
Distance H/2 1,866 [mm]
0.366P 0,732 [mm]
z 0,5 [mm]
Acc. to ISO 2901:1993, ISO 2902:1977, ISO 2904:1977
2) The height of the overlapping, considering on the basic profile, has value of height of basic profile (h3) .
The image of external (bolt) trapezoidal thread with tolerance positions
Major diameter
Basic d 10,000 mm
Minimum dmin 9,820 mm
Maximum dmax 10,000 mm
Tolerance Td 180 µm
Upper deviation (fundamental) es 0 µm
Lower deviation ei -180 µm
Pitch diameter
Basic d2 9,000 mm
Minimum d2 min 8,614 mm
Maximum d2 max 8,850 mm
Tolerance Td2 236 µm
Upper deviation (fundamental) es -150 µm
Lower deviation ei -386 µm
Minor diameter
Basic d3 7,500 mm
Minimum d3 min 7,055 mm
Maximum d3 max 7,500 mm
Tolerance Td3 445 µm
Upper deviation (fundamental) es 0 µm
Lower deviation ei -445 µm
Acc. to ISO 2903:1993, PN‑ISO 2903/Ak:1996

Thread basic dimensions

Tr10 x 2 - 8c
external (bolt)
Trapezoidal thread - dimensions and basic profile
Name Symb. Value Unit Remarks
Nominal diameter 10 [mm] first choice
Pitch P 2 [mm] preferred
Lead Ph 2 [mm]
Number of starts 1 [-]
Thread angle α 30°
Flank angle β 15°
Tolerance class 8c [-]
Major diameter d 10,000 [mm] 9,820 ÷ 10,000
Pitch diameter d2 9,000 [mm] 8,614 ÷ 8,850
Minor diameter d3 7,500 [mm] 7,055 ÷ 7,500
Crest clearance ac 0,25 [mm]
Height of thread h3 1,25 [mm]
Radius R1max 0,125 [mm]
R2max 0,25 [mm]
Height H 3,732 [mm]
Height of the overlapping H1 1 2) [mm]
Distance H/2 1,866 [mm]
0.366P 0,732 [mm]
z 0,5 [mm]
Acc. to ISO 2901:1993, ISO 2902:1977, ISO 2904:1977
2) The height of the overlapping, considering on the basic profile, has value of height of basic profile (h3) .

Thread tolerances

Tr10 x 2 - 8c
external (bolt)
The image of external (bolt) trapezoidal thread with tolerance positions
Major diameter
Basic d 10,000 mm
Minimum dmin 9,820 mm
Maximum dmax 10,000 mm
Tolerance Td 180 µm
Upper deviation (fundamental) es 0 µm
Lower deviation ei -180 µm
Pitch diameter
Basic d2 9,000 mm
Minimum d2 min 8,614 mm
Maximum d2 max 8,850 mm
Tolerance Td2 236 µm
Upper deviation (fundamental) es -150 µm
Lower deviation ei -386 µm
Minor diameter
Basic d3 7,500 mm
Minimum d3 min 7,055 mm
Maximum d3 max 7,500 mm
Tolerance Td3 445 µm
Upper deviation (fundamental) es 0 µm
Lower deviation ei -445 µm
Acc. to ISO 2903:1993, PN‑ISO 2903/Ak:1996

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