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Ht×l©ûZ«u (ùTôߧ«u)
RVô¬l©u ÕpXõVjûRd ϱd¡\Õ.

500ªÁ YûW«Xô] ùYqúYß AÜLÞdLô]
A¥lTûP A[Ü Á\pLs (fundamental deviation)
Utßm A¥lTûP Ht×l©ûZLs
B¡VûYL°u áhÓtÏ E¬V úUp A[Ü
Á\pLs Utßm ¸r A[Ü Á\pLs
¨oQ«dLlThP ®[dLlThP AhûP«p
ϱl©PlThÓs[].

Ht×l©ûZ (ùTôߧ) ùLôiP A[Ü
(Toleranced size)
A¥lTûP A[Ü, A¥lTûP A[Ü Á\p
Utßm Ht× ©ûZ RWm (grade of tolerance) B¡V
ùUôjRm, ùTôߧ ùLôiP A[Ü (Tolerance
size) GuTo.
ERôWQm

25 H7 GuTÕ Õû[«u ùTôߧ ùLôiP
A[®u ®TWm BÏm.

C§p 25 GuTÕ A¥lTûP A[Ü (basic size)
= BÏm. H GuTÕ A¥lTûP A[Ü Á\ûX
ϱl©Óm. (fundamental deviation).
7 GuTÕ ùTôߧ«u RWjûRd ϱl©Óm
(Fig 11) 25 e8 GuTÕ ùTôߧ ùLôiP
Ri¥u A[YôÏm. (toleranced size of a shaft).
A¥lTûP Ht×l©ûZLs (Fundamental
tolerance)

CûR Ht×l©ûZ RWm (grade of tolerence) G]Üm
AûZdLXôm. BIS - u T¬kÕûWL°u T¥ 18
RW YûLLs Es[]. CûY Gi AûPVô[m
êXm Õû[ Utßm RiÓ (shaft) YûLLÞdÏ
IT01, IT0, IT1....to IT16 G]d ϱl©PlTÓm. (Fig
10).

A§L Gi U§l×, A§L Ht×l ©ûZl
TϧûV (tolerance zone) ϱdÏm. C§p 25 GuTÕ A¥lTûP A[Ü BÏm.
GuTÕ A¥lTûP A[Ü Á\p GÝjRôp
ϱl©PlThÓs[Õ. 8 GuTÕ ùTôߧ«u
RWYûLûVd ϱd¡\Õ. (Fig 12)

£_õ & Gm: @©hPo (NSQF - Revised 2022) ------ R.T. for Ex. No.1.6.79
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