X-, AX- and T-Series Mold Bases
190
Ball Bushings for Floating Plates*
Ball Bushings are a highly effective means of reducing frictional drag in floating plates within a mold. Multiple-opening molds, with heavy floating (X) plates, are the most frequent application for either Lineal type or Pre-Loaded type Ball Bushings.
CLOSED POSITION
OPEN POSITION
UPPER CAVITY PLATE TOP CLAMPING PLATE
UPPER CAVITY PLATE TOP CLAMPING PLATE
LEADER PIN
UPPER CAVITY PLATE TOP CLAMPING PLATE
LEADER PIN
LEADER PIN
RETAINER RING
HEAVY FLOATING PLATE
RETAINER RING
HEAVY FLOATING PLATE
BALL BUSHING
SLEEVE
HEAVY FLOATING PLATE
BALL BUSHING
RETAINER RING
BALL RETAINER
RETAINER RING
SHOULDER BUSHING NOTE: BALL RETAINER MOVES IN SLEEVE AS LEADER PIN MOVES (RATIO IS 2:1)
LOWER CAVITY PLATE
LOWER CAVITY PLATE
LOWER CAVITY PLATE
SHOULDER BUSHING
SHOULDER BUSHING
SUPPORT PLATE
SUPPORT PLATE
SUPPORT PLATE
M D
X
X
B
X
E
A
B A
X
E
A
D
C
C
D
C
General Dimensions for Thomson Lineal Type Ball Bushings BUSHING IT A-122026 A-162536 A-203242 A-243848 A-324864 A (PIN DIA.) .750 1.000 1.250 1.500 2.000 B (BUSHING DIA.) 1.250 1.5625 2.000 2.375 3.000 C (BUSHING LENGTH) 1.625 2.250 2.625 3.000 4.000 General Dimensions for DME Pre-Loaded Type Ball Bushings* NOMINAL SIZE 3 / 4 1" 1 1 / 4 1 1 / 2 1 3 / 4 2" A (PIN DIA.) .753 1.003 1.253 1.503 1.753 2.003 B (BUSHING DIA.) 1.387 1.717 2.107 2.437 2.747 3.162 C (BUSHING LENGTH) 1 3 / 4 TO 6" 2" TO 7" 2 1 / 2 TO 9" 3" TO 12" 3" TO 13" 3" TO 14" D ( 1 / 4 INCREMENT RETAINER LENGTH) 1 1 / 2 " TO 2" 1 1 / 2 TO 2 1 / 4 2" TO 3" 2 1 / 2 TO 3 1 / 2 2 3 / 4 TO 4" 3 1 / 4 TO 4 1 / 4 M (PIN LENGTH) 3" TO 6" 3 3 / 4 TO 9" 4 1 / 2 TO 12" 4 1 / 2 TO 14" 5" TO 17" 5 1 / 2 TO 18"
NOTES: Specifications shown are for DME precision grade. Due to the larger O.D. of the bushing counterbore required, ball bushings cannot be installed in standard leader pin locations in the mold base assembly.
NOTES: Specifications shown are for Thomson precision series A. Two rings are required for each bushing. Due to the larger O.D. of the bushing counterbore required, ball bushings usually cannot be installed in standard leader pin locations in the mold base assembly.
RETAINER RING ITEM NUMBER
W-750
W-1000
W-1250
W-1500
W-2000
D
1.062 1.620
1.625 2.040
1.875 2.500
2.250 2.910
3.000 3.600
E
COUNTERBORE DIA. (FOR RETAINER RING)
1.69
2.10
2.55
3.01
3.69
* THESE ARE SPECIAL ORDER ITEMS ONLY.
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ dme.net ■ store.dme.net
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