Ra va Rz o'rtasidagi farq nima?

Ra (arithmetical mean roughness) is the average of absolute profile deviations from the mean line over the evaluation length. Rz (maximum height) is the average of the five highest peaks and five deepest valleys within the evaluation length. Ra gives an overall average roughness, while Rz is more sensitive to individual peaks and valleys. Roughly, Rz ≈ 4×Ra for most machined surfaces.

Ra va Rz o'rtasida qanday konvertatsiya qilish mumkin?

A rough approximation is Rz ≈ 4×Ra, but the exact ratio depends on the surface profile and machining process. For precision work, use the ISO standard conversion tables. For general engineering, the ×4 factor provides a reasonable estimate.

N sinfi (dag'allik darajasi) nima?

N classes (N1 through N12) are roughness grade numbers defined in ISO 1302. Each grade corresponds to a specific Ra value: N1=0.025 μm, N2=0.05 μm, N3=0.1 μm, up to N12=50 μm. They provide a simplified way to specify surface roughness on drawings.

Mexanik ishlov berish operatsiyalari uchun tipik Ra qiymatlari qanday?

Tipik Ra qiymatlari: Lapping/superfinishing: 0.025–0.1 μm (N1–N3). Nozik silliqlash: 0.2–0.4 μm (N4–N5). Oddiy silliqlash/nozik tornalash: 0.8–1.6 μm (N6–N7). Qo'pol tornalash/frezerash: 3.2–12.5 μm (N8–N10). Quyish/zarb qilish: 25–50 μm (N11–N12).

Podshipnik o'rindiqlari uchun qanday Ra talab qilinadi?

Podshipnik o'rindiqlari odatda val va korpus teshigi uchun Ra 0.8–1.6 μm (N6–N7) talab qiladi. Yuqori aniqlikdagi podshipniklar uchun Ra 0.4 μm (N5) yoki undan yaxshiroq talab etilishi mumkin. Har doim podshipnik ishlab chiqaruvchisining tavsiyalarini tekshiring.

Muhandislik uchun bepul vosita

Sirt qo'polligi konvertori

Ra, Rz, dag'allik sinfi (N1–N12) va CLA/AA mikroduym qiymatlari o'rtasida konvertatsiya qiling. Yuzaki sifat tavsiflari va xarakterli mexanik ishlov berish jarayonlari ham keltirilgan.

Ra ↔ Rz Class N1–N12 CLA / AA μin

Results

Ra (Arifmetik o'rtacha dag'allik)

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Rz (Maksimal balandlik)

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Dag'allik sinfi

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CLA / AA

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Yuzaki tavsif

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Tipik texnologik jarayon

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Class	Ra (μm)	Rz (μm)	CLA (μin)	Tavsif	Tipik texnologik jarayon
N1	0.025	0.1	1	Mirror finish	Superfinishing, lapping
N2	0.05	0.2	2	Mirror finish	Superfinishing, lapping
N3	0.1	0.4	4	Very smooth	Lapping, honing
N4	0.2	0.8	8	Smooth	Nozik silliqlash, honing
N5	0.4	1.6	16	Smooth	Fine grinding
N6	0.8	3.2	32	Fine	Silliqlash, nozik tornalash
N7	1.6	6.3	63	Fine	Tornalash, frezerash
N8	3.2	12.5	125	Medium	Tornalash, frezerash
N9	6.3	25	250	Medium rough	Qo'pol mexanik ishlov berish
N10	12.5	50	500	Rough	Qo'pol mexanik ishlov berish
N11	25	100	1000	Very rough	Quyish, zarb qilish
N12	50	200	2000	Very rough	Quyish, zarb qilish, alanga bilan kesish

Ra — Arifmetik O'rtacha Dag'allik

Ra — profilning o'rtacha chiziqdan mutlaq og'ishlarining arifmetik o'rtachasi bo'lib, baholash uzunligi bo'yicha o'lchanadi:

Ra — dunyoda eng keng qo'llaniladigan dag'allik parametridir. U sirt teksturasini umumiy tarzda ifodalaydi, ammo alohida cho'qqilar yoki botiqlarni yashirib qo'yishi mumkin.

Rz — Profilning Maksimal Balandligi

Rz — ketma-ket beshta namuna uzunligining yagona dag'allik chuqurliklarining o'rtachasidir. U chekka cho'qqilar va botiqlarga nisbatan ko'proq sezgir:

Taxminiy Konvertatsiya

ℹ️ Note: The Rz ≈ 4×Ra approximation is a rough guide for typical machined surfaces. The actual ratio depends on the surface profile shape and machining process, and can range from 3 to 8.

CLA / AA Konvertatsiyasi

CLA (Centre Line Average) va AA (Arithmetic Average) — Ra uchun eskirgan atamalar bo'lib, mikroinch birligida ifodalanadi. 1 μm = 39,37 μin.

⚠️ Important: Ra va Rz o'rtasidagi konvertatsiya taxminiydir. Muhim ilovalar uchun spetsifikatsiya talab qilgan aniq parametrni bevosita o'lchang.

Surface Roughness Converter | Ra ↔ Rz ↔ Class ↔ Finish

Published by Nikolai Shelkovenko on Fevral 15, 2026 Fevral 15, 2026

Results

Ra — Arifmetik O'rtacha Dag'allik

Rz — Profilning Maksimal Balandligi

Taxminiy Konvertatsiya

CLA / AA Konvertatsiyasi

Do'kon

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