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Trapezoidal Screw Threads

Relevant 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 ........Table of Threads to DIN 103-4



Thread Proportions
H1 = 0,5p H4 = H1 + ach3 = H1 + ac
D4 = d + 2ac Z = H1 /2D1 = 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 2904:1977

All dimensions in milli metres

dPd2 =D2D4d3D1 dPd2 =D2D4d3D1
mmmmmmmmmmmmmmmmmmmmmmmm
81,57,2508,3006,2006,500     42340,50042,50038,50039,000
     91,58,2509,3007,2007,500     42738,50043,00034,00035,000
     928,0009,5009.2507,000     421037,00043,00041,00032,000
101,59,25011,0002,0003,00044342,50044,50040,50041,000
1029,00010,5007,5008,00044740,50045,00036,00037,000
     11210,00011,5008,5009,000441238,00045,00031,00032,000
     1139,50011,5007,5008,000     46 344,50046,50042,50043,000
12211,00012,5009,50010,000     46842,000 47,00037,00038,000
12310,50012,5008,5009,000     4612 40,00047,00033,00034,000
     14213,00014,50011,50012,00048346,500 48,50044,50045,000
     14312,50014,50010,50011,00048844,000 49,00039,00040,000
16215,00016,50013,50014,000481242,00049,000 35,00036,000
16314,50016,50012,50013,000     50348,500 50,50046,50047,000
     18217,00018,50015,50016,000     50 846,00051,00041,00042,000
     18416,00018,50013,50014,000     50 1244,00051,00037,00038,000
20219,00020,50017,50018,00052350,50052,50048,500 49,000
20418,00020,50015,50016,00052848,00053,00043,000 44,000
     22320,50022,50018,50019,000521246,000 53,00039,00040,000
     22519,50022,50016,50017,000     55 353,50055,50051,50052,000
     22818,00023,00013,00014,000     55 950,50056,00045,00046,000
24322,50024,50020,50021,000     551448,00057,000 39,00041,000
24521,50024,50018,50019,00060358,50060,50056,500 57,000
24820,00025,00015,00016,00060955,50061,00050,000 51,000
     26324,50026,50022,50023,000601453,000 62,00044,00046,000
     26523,50026,50020,50021,000     65 463,00065,50060,50061,000
     26822,00027,00017,00018,000     65 1060,00066,00054,00055,000
28326,50028,50024,50025,000     651657,000 67,00047,00049,000
28525,50028,50022,50023,00070468,00070,50065,500 66,000
     28824,00029,00019,00020,000701065,000 71,00059,00060,000
     30328,50030,50026,50027,000701662,000 72,00052,00054,000
     30627,00030,50023,00024,000     75 473,00075,50070,50071,000
301025,00031,00019,00020,000     751070,000 76,00064,00065,000
32330,50032,50028,50029,000     751667,000 77,00057,00059,000
32629,00032,50025,00026,00080478,00080,50075,500 76,000
321027,00033,00021,00022,000801075,00081,00069,000 70,000
     34332,50034,50030,50031,000801672,000 82,00062,00064,000
     34631,00034,50027,00028,000     85 483,00085,50080,50081,000
     341029,00035,00023,00024,000     85 1279,00086,00072,00073,000
36334,50036,50032,50033,000     851876,000 87,00065,00067,000
36633,00036,50029,00030,000     95493,000 95,50090,50091,000
361031,00037,00025,00026,000     951289,000 96,00082,00083,000
     38336,50038,50034,50035,000     95 1886,00097,00075,00077,000
     38734,50039,00030,00031,000100498,000 100,50095,50096,000
     381033,00039,00027,00028,0001001294,000 101,00087,00088,000
40338,50040,50036,50037,0001002090,000102,00078,000 80,000
40736,50041,00032,00033,000
401035,00041,00029,00030,000





Trapezoidal Thread form to Din 103-4



Table of trapezoidal thread dimensions to DIN 103-4

DsPEheabKshsDn Knhn
mm
1038,51,250,250,56,51,7510,57,51,5
12310,51,250,250,58,51,7512,59,51,5
144121,750,250,59,52,2514,510,52
164141,750,250,511,52,2516,512,52
184161,750,250,513,52,2518,514,52
204181,750,250,515,52,2520,516,52
22519,520,250,7516,52,2522,5182
24521,520,250,7518,52,2524,5202,25
26523,520,250,7520,52,2526,5222,25
28525,520,250,7522,52,2528,5242,25
306272,50,250,7523,53,2530,5252,75
326292,50,250,7525,53,2532,5272,75
366332,50,250,7529,53,2536,5312,75
40736,530,250,7532,53,7540,5343,25
44740,530,250,7536,53,7544,5383,25
488443,50,250,7539,54,2548,5413,75
508463,50,250,7541,54,2550,5433,75
528483,50,250,7543,54,2552,5453,75
55950,540,250,7545,54,7555,5474,25
60955,540,250,7550,54,7560,5524,25
6510604,50,250,7554,55,2565,5564,75
7010654,50,250,7559,55,2570,5614,75
7510704,50,250,7564,55,2575,5664,75
8010754,50,250,7569,55,2580,5714,75
8512795,50,250,7572,56,2585,5745,75
9012845,50,250,7577,56,2590,5795,75
9512895,50,250,7582,56,2595,5845,75
10012945,50,250,7587,56,25100,5895,75



Useful Links
  1. roton..Information on Trapezoidal Lead screws
  2. getotec..Manufacturers technical brochure

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Last Updated 24/01/2013