The finer the tolerances required, the more costly the part. M2 is the normal tolerance band for industrial parts. Bear in mind that rubber is elastic and easily accomodates variation. M1 tolerances require the moulding process to be designed around dimensions for example by reducing the number of cavities or reducing injection speeds and will usually mean increase costs.
Tolerances for moulded products to ISO 3302 1995 (BS 3734)
Table classes M1 (Precision) and M2 (Commercial).
F = Fixed dimensions (across cavity area)
C = Closure dimensions (dimensions affected by split lines)
The lowest cost of quality is obtained when it is built into the development process by agreement. Inspecting it in at a later date is relatively expensive.
Mech is approved to ISO 9002 and many other standards.
"ONGC - Oil and Natural Gas Corporation Limited" - Our complex drilling application where Shaft was eccentric and application was robust & muddy. Replacement was never easy. Mech Spares designed Oil seals resolved difficulty. This gave a complete joy to my maintenance team.
"Mr Mohammed Al Duaigy" of (Kuwait National Petroleum Company) : We tried several diaphragms from renown worldwide Rubber manufacturing companies. We found Mech Spares technical know how and product to be of great durability and lasted 3 times more then anticipated. They have accurate understanding of there products.
"McCafferty BM Design Ltd, KENT United Kingdom" - Most of the O rings manufacturing company suggested to use larger diameter and expensive elastomers. We learnt with Mech Spares that elastomer being weaker compare to metal and alloys and needs appropriate back up for high pressure or high vacuum applications. Further not necessary the most expensive elastomer is the best for all applications. We trust Mr Nilesh chodhari completely for all our O rings designing applications.
"Dr. A. Singh" of BARC: The electric Insulation mat manufactured by MECH SPARES as per IS 15624 tested at ERTL and found to withstand 40 Kv and still didn't tear. We have been using since 5 years and still didn't generate any fatigue. They arranged bulk delivery in short period.
"Tata Steel" - One of our old machines started making loud noise and disturbed the entire village. We were compelled to stop the machines which lead to huge production loss. With the help of Mech Spares designed bellows in two part we could retain the lubrication and eliminate the noise.
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