ISO 1328-1:2013 defines the ISO flank tolerance classification system for cylindrical gears. Eleven flank tolerance classes are defined, numbered 1 (highest precision) to 11 (lowest). It specifies tolerances for pitch, profile, and helix deviations.

Ninahitaji daraja gani la ubora?

Class 5-6: precision gearing (machine tools, instruments). Class 6-7: general engineering. Class 8-9: heavy machinery. Class 10-11: rough gearing. Most industrial gearboxes use class 6-8.

Kupotoka kwa mzingiro jumla (Fp) ni nini?

Fp ni tofauti ya juu zaidi kati ya mzingiro halisi na wa nadharia wa jumla kwa meno yote. Inaonyesha usahihi wa nafasi za meno yote kuzunguka gia. Hupimwa kwa kutumia mashine za kupima gia.

Kupotoka kwa mstari wa meno ni nini?

Kupotoka kwa mstari wa meno hupima jinsi mstari halisi wa jino unavyotofautiana na involuti ya nadharia. Inajumuisha kupotoka kwa mstari jumla (Fα), kupotoka kwa umbo la mstari (ffα), na kupotoka kwa mtelemko wa mstari (fHα).

Uvumilivu wa ISO 1328 huhesabiwaje?

Tolerances are calculated with the formulae of ISO 1328-1:2013, clause 5.3, from normal module (mn), reference diameter (d), and facewidth (b). Values are computed for class 5 and scaled by a step factor of √2 per class, so tolerances double every two classes.

Zana ya Bure ya Uhandisi #095

Kikokotoo cha Tabaka la Usahihi wa Gear

Uvumilivu wa usahihi wa gia la ISO 1328-1. Ingiza moduli, kipenyo cha mzingiro, upana wa uso, na daraja la ubora ili kupata uvumilivu wa kupotoka kwa mzingiro, mstari wa meno, na helikoidi.

ISO 1328-1Classes 1–11Tolerances

Results

Quality Class

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Upotovu wa Jumla wa Mwelekeo F_p

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Upotovu wa Mwelekeo Mmoja f_pt

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Upotovu wa Jumla wa Umbo la Jino F_α

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Upotovu wa Jumla wa Mstari wa Ond F_β

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ISO 1328-1:2013 Tolerance Formulas

Where A is the flank tolerance class (1–11), m_n is the normal module, d the reference diameter and b the facewidth, in mm. Tolerances are calculated for class 5 and scaled by the step factor √2 per class (2^0.5(A−5)), so values double every two classes. Total profile tolerance F_αT and total helix tolerance F_βT are the root-sum-squares of the corresponding slope and form tolerances (clause 5.3). The formulae apply within 5 ≤ z ≤ 1 000, 5 mm ≤ d ≤ 15 000 mm, 0.5 mm ≤ m_n ≤ 70 mm, 4 mm ≤ b ≤ 1 200 mm.

Mwongozo wa Matumizi ya Daraja la Ubora

Class	Application	Kipimo cha Kawaida cha Uvumilivu
3–4	Meno ya gia ya marejeleo, vyombo vya kupimia	Finest
5–6	Mashine za zana, kisanduku cha gia cha usahihi, meno ya gia ya turbini	Precision
7–8	Vipande vya gia vya viwandani kwa ujumla, usafirishaji wa magari	Standard
9–10	Mitambo mizito, uchimbaji madini, saruji	Coarse
11	Gia za kawaida, kilimo, mwendo wa polepole	Very coarse

Kikokotoo cha Daraja la Usahihi wa Gia | ISO 1328-1 | Zana ya Bure ya Mtandaoni

Published by Nikolai Shelkovenko on Febuari 15, 2026 Julai 2, 2026

Results

ISO 1328-1:2013 Tolerance Formulas

Mwongozo wa Matumizi ya Daraja la Ubora

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