MD-2

General

MD Series Introduction:

The recent development of the MD series index drive confirms Stelron’s commitment to designing and manufacturing quality components to meet the growing needs of our customers. As industry requirements change, Stelron is dedicated to bringing new technology with the trusted reliability of cam actuated equipment.

Standard Features:

Extra large thru hole
Integral center post
Improved accuracy +/- .0007 @ pitch radius
Low-profile
Rugged design
Servo-ready version
High torque capacity
Available in (3) sizes
Higher number of stations
Medical and clean room solutions

General:

The MD indexer design incorporates the highest degree of application versatility available today. The integral center post with stationary dial plate is ideal for centrally mounting robots and other pick-and-place type actuators. The low-profile design of the housing makes it ideal for applications where there is a space constraint, and the machined housing surfaces provide universal mounting on any of the five sides. The large pitch diameter of the cam followers allow for superior accuracy and stability at a greater radius from the from the center of the dial.

Size & Range

The Md series indexer is offered in three sizes, with thru hole dimensions ranging from 5 inches up to 9.25 inches in diameter. The low-profile height of these units ranges from 6.750 inches to 9.375 inches. These indexers are available in up to 24 stations in a type one cam, allowing for even better accuracy. Special indexing motion sequences are available upon request.

Construction:

The heart of the MD series index drive is our large-diameter barrel cam. This cam is machined from the highest quality steel, CNC profile-ground, and hardened for outstanding durability and accuracy. This barrel cam is manufactured with preload to provide a fixed center distance between the input and output.

Technical

SPEED FACTORS
INDEXES PER MIN		25	50	75	100	200	500
FACTOR Cs		.8	1.0	1.12	1.25	1.4	2.0
LIFE FACTORS
LIFE(1000-hrs)		4	8	12	16	24	40
FACTOR Cl		.8	1.0	1.12	1.25	1.4	1.6
OUTPUT BEARING MOMENT RATING (Inch-lbs)
MODEL		MD-1		MD-2		MD-3
STATIC		138,700		237,200		362,000
DYNAMIC		64,900		98,300		136,200
OUTPUT BEARING THRUST RATING (Inch-lbs)
MODEL		MD-1		MD-2		MD-3
STATIC		53,350		69,770		86,180
DYNAMIC		23,180		25,510		29,300
SERVO ~ CONSTANT LEAD SERIES
RATIO	MOTION	MD-1		MD-2		MD-3
6:1	CV	8,360		19,350		52,900
8:1	CV	10,150		23,800		65,100
12:1	CV	10,120		24,100		66,000
16:1	CV	11,580		27,800		76,300
INT. INERTIA lb-in²		1,350		27,800		76,300
PITCH RAD. ROLLERS		5.500		7.500		9.500

STANDARD SEQUENCES AND CAPACITIES
Number of Stops	Indexer period	“Tr” B10 @ 50 IND/MIN (in-lbs)
Number of Stops	Indexer period	MD-1	MD-2	MD-3
4	270°	4,640	8,180	18,160
6	180°	5,310	9,365	20,780
6	270°	8,480	19,490	53,230
8	150°	6,600	7,890	13,590
8	180°	6,840	12,130	25,960
8	270°	10,520	24,450	66,880
12	90°	6,690	11,790	26,180
12	120°	10,490	23,990	65,570
12	150°	10,810	24,950	68,180
12	180°	10,930	25,440	69,570
12	270°	10,750	24,440	69,700
16	90°	8,610	15,280	30,860
16	120°	13,160	30,460	83,280
16	150°	13,270	30,980	84,790
16	180°	13,160	30,980	84,890
16	270°	12,470	29,780	81,700
24	90°	11,760	21,210	47,200
24	120°	11,690	21,340	47,560
24	150°	11,410	21,010	69,850
24	180°	11,070	38,990	68,220
24	270°	14,880	35,890	62,800
ALL OF THE ABOVE SEQUENCES USE MODIFIED SINE MOTION