Medical Device Components: Precision Manufacturing Techniques Precisionx

Standards & Tolerances

Dimensional Standards – General

All sizes are given in outside dimensions (EXCEPT outside fitting covers and Relay Case, also called TC Case, A & B dimensions).
The basic A, B and C dimensions and tolerances apply at the point of tangency of the radius. Bow tolerances are additive to the measured A, B and C dimension.
The normal result of the deep drawing process renders the closed end of the can and corner radius areas thicker than the side wall.
Piercing and trim burrs will be maintained within the limits specified below.
Deburring shall be considered a separate and additional operation when removal beyond the listed limits is required.
Standard tolerances (all measurements are in inches):

WALL THICKNESS	TOLERANCE
.010 .012	± .002
.016 .019 .022 .025 .028	+ .002 – .003
.031 .036 .042	+ .002 – .004
.048 & OVER	± .005
TOLERANCE FOR LENGTH ROUND & SQUARE – “B” DIMENSION RECTANGLE – “C” DIMENSION
SIZE RANGE ROUND, SQUARE & RECTANGLE	LENGTH TOLERANCE
0 to 3.999	± .015
OVER 4.000	± .031
BURR TOLERANCES
MATERIAL THICKNESS	MAX BURR PERMISSABLE
Up to .010	.001
.011 to .025	.002
.026 to .065	.003
Over .065	.005

INSIDE SIDE RADII	± .010
INSIDE BOTTOM RADII	± .015
All measurements are in inches

TOLERANCE FOR OPEN END OF CAN ROUND & SQUARE – “A” DIMENSION RECTANGLE – “A & B” DIMENSION
SIZE RANGE (see note 1)	TOLERANCE (see note 2)	ALLOWABLE BOW PER SIDE FOR SQUARE & RECTANGLE DIMENSION “A”
0 to .749	± .005	.005
.750 to 1.499	± .008	.008
1.500 to 1.999	± .010	.010
2.000 to 3.499	± .015	.015
Over 3.500	± .020	.020
All measurements are in inches Note 1: For “B” dimensions tolerance of rectangle cans – use tolerance applied to “A” dimension. Note 2: For round cans – this tolerance also applies for out of roundness.

INSIDE SIDE RADII ± .010 INSIDE BOTTOM RADII ± .015 All measurements are in inches

TOLERANCE FOR OPEN END OF CAN ROUND & SQUARE – “A” DIMENSION RECTANGLE – “A & B” DIMENSION
SIZE RANGE (see note 1)	TOLERANCE (see note 2)	ALLOWABLE BOW PER SIDE FOR SQUARE & RECTANGLE DIMENSION “A”
0 to .749	± .005	.005
.750 to 1.499	± .008	.008
1.500 to 1.999	± .010	.010
2.000 to 3.499	± .015	.015
Over 3.500	± .020	.020
All measurements are in inches Note 1: For “B” dimensions tolerance of rectangle cans – use tolerance applied to “A” dimension. Note 2: For round cans – this tolerance also applies for out of roundness.

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