trapezoidal threads

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Trapezoidal Screw Threads

Relevant StandardsRelevant StandardsRelevant StandardsRelevant Standards

BS 5346:1976 Specification for ISO metric trapezoidal screw threads

ISO 2901:1977 ISO metric trapezoidal screw threads -- Basic profile and maximum material profiles

ISO 2902:1977 ISO metric trapezoidal screw threads -- General plan

ISO 2903:1977 ISO metric trapezoidal screw threads -- Tolerances

ISO 2904:1977 ISO metric trapezoidal screw threads -- Basic dimensions

Din 103-4 ISO Metric Trapezoidal Screw Thread; Nominal Dimensions

Trapezoidal Thread form to ISO 2904 Trapezoidal Thread form to ISO 2904 Trapezoidal Thread form to ISO 2904 Trapezoidal Thread form to ISO 2904 ........Table of Threads to DIN 103-4

Thread ProportionsThread ProportionsThread ProportionsThread Proportions

H1 = 0,5p H4 = H1 + ac h3 = H1 + ac

D4 = d + 2ac Z = H1 /2 D1 = d - 2H1 = d - p

d3 = D - 2h3 d2 = D2= d - 2Z = d - 0,5p R1max= 0,5 ac R2max= ac

ac = ( D4 - d ) /2

Table of trapezoidal screw threads are in accordance with ISO 2904:1977Table of trapezoidal screw threads are in accordance with ISO 2904:1977Table of trapezoidal screw threads are in accordance with ISO 2904:1977Table of trapezoidal screw threads are in accordance with ISO 2904:1977

All dimensions in milli metres

d P d2 =D2 D4 d3 D1 d P d2 =D2 D4 d3 D1

mm mm mm mm mm mm mm mm mm mm mm mm

8 1,5 7,250 8,300 6,200 6,500 42 3 40,500 42,500 38,500 39,000

9 1,5 8,250 9,300 7,200 7,500 42 7 38,500 43,000 34,000 35,000

9 2 8,000 9,500 9.250 7,000 42 10 37,000 43,000 41,000 32,000

10 1,5 9,250 11,000 2,000 3,000 44 3 42,500 44,500 40,500 41,000

10 2 9,000 10,500 7,500 8,000 44 7 40,500 45,000 36,000 37,000

11 2 10,000 11,500 8,500 9,000 44 12 38,000 45,000 31,000 32,000

11 3 9,500 11,500 7,500 8,000 46 3 44,500 46,500 42,500 43,000

12 2 11,000 12,500 9,500 10,000 46 8 42,000 47,000 37,000 38,000

12 3 10,500 12,500 8,500 9,000 46 12 40,000 47,000 33,000 34,000

14 2 13,000 14,500 11,500 12,000 48 3 46,500 48,500 44,500 45,000

14 3 12,500 14,500 10,500 11,000 48 8 44,000 49,000 39,000 40,000

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Trapezoidal Threads http://www.roymech.co.uk/Useful_Tables/Screws/Trapezoidal.html

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16 2 15,000 16,500 13,500 14,000 48 12 42,000 49,000 35,000 36,000

16 3 14,500 16,500 12,500 13,000 50 3 48,500 50,500 46,500 47,000

18 2 17,000 18,500 15,500 16,000 50 8 46,000 51,000 41,000 42,000

18 4 16,000 18,500 13,500 14,000 50 12 44,000 51,000 37,000 38,000

20 2 19,000 20,500 17,500 18,000 52 3 50,500 52,500 48,500 49,000

20 4 18,000 20,500 15,500 16,000 52 8 48,000 53,000 43,000 44,000

22 3 20,500 22,500 18,500 19,000 52 12 46,000 53,000 39,000 40,000

22 5 19,500 22,500 16,500 17,000 55 3 53,500 55,500 51,500 52,000

22 8 18,000 23,000 13,000 14,000 55 9 50,500 56,000 45,000 46,000

24 3 22,500 24,500 20,500 21,000 55 14 48,000 57,000 39,000 41,000

24 5 21,500 24,500 18,500 19,000 60 3 58,500 60,500 56,500 57,000

24 8 20,000 25,000 15,000 16,000 60 9 55,500 61,000 50,000 51,000

26 3 24,500 26,500 22,500 23,000 60 14 53,000 62,000 44,000 46,000

26 5 23,500 26,500 20,500 21,000 65 4 63,000 65,500 60,500 61,000

26 8 22,000 27,000 17,000 18,000 65 10 60,000 66,000 54,000 55,000

28 3 26,500 28,500 24,500 25,000 65 16 57,000 67,000 47,000 49,000

28 5 25,500 28,500 22,500 23,000 70 4 68,000 70,500 65,500 66,000

28 8 24,000 29,000 19,000 20,000 70 10 65,000 71,000 59,000 60,000

30 3 28,500 30,500 26,500 27,000 70 16 62,000 72,000 52,000 54,000

30 6 27,000 30,500 23,000 24,000 75 4 73,000 75,500 70,500 71,000

30 10 25,000 31,000 19,000 20,000 75 10 70,000 76,000 64,000 65,000

32 3 30,500 32,500 28,500 29,000 75 16 67,000 77,000 57,000 59,000

32 6 29,000 32,500 25,000 26,000 80 4 78,000 80,500 75,500 76,000

32 10 27,000 33,000 21,000 22,000 80 10 75,000 81,000 69,000 70,000

34 3 32,500 34,500 30,500 31,000 80 16 72,000 82,000 62,000 64,000

34 6 31,000 34,500 27,000 28,000 85 4 83,000 85,500 80,500 81,000

34 10 29,000 35,000 23,000 24,000 85 12 79,000 86,000 72,000 73,000

36 3 34,500 36,500 32,500 33,000 85 18 76,000 87,000 65,000 67,000

36 6 33,000 36,500 29,000 30,000 95 4 93,000 95,500 90,500 91,000

36 10 31,000 37,000 25,000 26,000 95 12 89,000 96,000 82,000 83,000

38 3 36,500 38,500 34,500 35,000 95 18 86,000 97,000 75,000 77,000

38 7 34,500 39,000 30,000 31,000 100 4 98,000 100,500 95,500 96,000

38 10 33,000 39,000 27,000 28,000 100 12 94,000 101,000 87,000 88,000

40 3 38,500 40,500 36,500 37,000 100 20 90,000 102,000 78,000 80,000

40 7 36,500 41,000 32,000 33,000

40 10 35,000 41,000 29,000 30,000

Trapezoidal Thread form to Din 103-4Trapezoidal Thread form to Din 103-4Trapezoidal Thread form to Din 103-4Trapezoidal Thread form to Din 103-4

Table of trapezoidal thread dimensions to DIN 103-4Table of trapezoidal thread dimensions to DIN 103-4Table of trapezoidal thread dimensions to DIN 103-4Table of trapezoidal thread dimensions to DIN 103-4

Ds P E he a b Ks hs Dn Kn hn

mm

10 3 8,5 1,25 0,25 0,5 6,5 1,75 10,5 7,5 1,5

12 3 10,5 1,25 0,25 0,5 8,5 1,75 12,5 9,5 1,5


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14 4 12 1,75 0,25 0,5 9,5 2,25 14,5 10,5 2

16 4 14 1,75 0,25 0,5 11,5 2,25 16,5 12,5 2

18 4 16 1,75 0,25 0,5 13,5 2,25 18,5 14,5 2

20 4 18 1,75 0,25 0,5 15,5 2,25 20,5 16,5 2

22 5 19,5 2 0,25 0,75 16,5 2,25 22,5 18 2

24 5 21,5 2 0,25 0,75 18,5 2,25 24,5 20 2,25

26 5 23,5 2 0,25 0,75 20,5 2,25 26,5 22 2,25

28 5 25,5 2 0,25 0,75 22,5 2,25 28,5 24 2,25

30 6 27 2,5 0,25 0,75 23,5 3,25 30,5 25 2,75

32 6 29 2,5 0,25 0,75 25,5 3,25 32,5 27 2,75

36 6 33 2,5 0,25 0,75 29,5 3,25 36,5 31 2,75

40 7 36,5 3 0,25 0,75 32,5 3,75 40,5 34 3,25

44 7 40,5 3 0,25 0,75 36,5 3,75 44,5 38 3,25

48 8 44 3,5 0,25 0,75 39,5 4,25 48,5 41 3,75

50 8 46 3,5 0,25 0,75 41,5 4,25 50,5 43 3,75

52 8 48 3,5 0,25 0,75 43,5 4,25 52,5 45 3,75

55 9 50,5 4 0,25 0,75 45,5 4,75 55,5 47 4,25

60 9 55,5 4 0,25 0,75 50,5 4,75 60,5 52 4,25

65 10 60 4,5 0,25 0,75 54,5 5,25 65,5 56 4,75

70 10 65 4,5 0,25 0,75 59,5 5,25 70,5 61 4,75

75 10 70 4,5 0,25 0,75 64,5 5,25 75,5 66 4,75

80 10 75 4,5 0,25 0,75 69,5 5,25 80,5 71 4,75

85 12 79 5,5 0,25 0,75 72,5 6,25 85,5 74 5,75

90 12 84 5,5 0,25 0,75 77,5 6,25 90,5 79 5,75

95 12 89 5,5 0,25 0,75 82,5 6,25 95,5 84 5,75

100 12 94 5,5 0,25 0,75 87,5 6,25 100,5 89 5,75

Useful Links

roton..Information on Trapezoidal Lead screws1.

getotec..Manufacturers technical brochure2.

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Last Updated 24/01/2013

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