MS3215 Ring, Retaining, External, E, Reinforced Reduced Section Type

Pages 1 - 2 - 3 - 4 - 5

MS3215C

(b)  Corrosion resistant steel - shall be cleaned, descaled and passivated in accordance with SAE- AMS2700.

5.  Part number:  The basic MS part number is followed by a dash number taken from Table III.

Example:  MS3215-1025 is the part number for a carbon steel, cadmium plate, external, "E" reinforced, retaining ring for use on a .250 diameter shaft.

TABLE III.  Dash numbers for MS3215

1/  Substitute corrosion resistant steel when used in food processing machinery, or in fuel or lubrication systems, or

when used at temperatures over 450°F (233°C)

Notes:

1.  Unless otherwise specified, all dimensions in inches.

2.  In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence.

3.  Recommended design limitations and usage:

(a)  Intended use - To provide unusually large shoulders for positioning and maintaining machine components on shafts.  They are applied radially and withstand strong push-out forces resulting from heavy vibrations and shock loads, high rotational speeds or relative rotation between the retained parts.  They are of further advantage where axial assembly of a retaining ring is not possible and where fast assembly for mass production lines is essential.  The use of the following formulas is based on the fact that the ring material will not fail in compression.

Limitation on use - the following formulas are not to be used for brittle materials such as cast iron, etc.

Warning - Rings shall not be over expanded during installation since this will lead to ring failure.  If ring has play between the groove diameter and the inside ring diameter, this indicates that the ring has been over expanded, (providing groove has been machined to recommended dimensions).

For approximate safety RPM limits see Table IV.

3