Page 77 - Hot Runner & Control Systems 2020

Gate-Mate Hot Sprue Bushings 75
®

Medium Gate-Mate Machining Dimensions
®

Machining Dimensions for Bushings
BUSHING ASSIMBLY
Improved tip insulation, elimination of material degradation in
2.187 DIA.
2.157 +.002 threaded area of tip, and faster color changes can be achieved
–.000 DIA.
1.625 DIA. through use of a Gate Shell Insulator.
.563 .625 WIRE CHANNEL
.219 .125 RAD.
4.000 DIA. 90˚

+.0005
+.0005 –.0000
–.0000 .140 .7500 DIA.
.7500 DIA. A + BE
.125 RAD. SEE NOTE .80˚
30˚ .375 RAD. INCL
.875
TO SUIT .030
.044 MIN. .005 LAND (MAX.)
(.030 MIN. FOR
.31 MIN. DISTANCE BETWEEN SUPER SHARP TIP) .187 SPH. RAD.
WATERLINE AND DROP
NOTE:
The expansion factor must be taken into consideration prior to machining for, and
installing bushing. This factor (BE) must then be added to the nominal A dimension. ITEM NUMBER
Formula for determining this expansion is as follows: BE = “A” dimension x 0.00000633 REFERENCE
x nozzle set point - 68ºF (assuming the mold is at 68ºF during operation). If mold A
temperature is different, substitute 68ºF with actual mold temperature. BUSHING BUSHING
ASSEMBLY SUB-ASSEMBLY
EXAMPLE: GMB5232 GMB0020 2.375
Given a 2.375 inch A dimension, with a Bushing Set Point temp. of 500°F: GMB5332 GMB0030 3.375
BE = 2.375 × .0000063 × (500 – 68) = .006 thus A + BE will be 2.381.
Please note that the above information is given as an example. Variations may occur
based on mold configurations and cooling factor. In some instances, it may be necessary
to obtain an empirical factor. Gate-Mate ® Hot Sprue Bushings | Medium Gate-Mate ® Machining Dimensions
Replacement Parts

ITEM NUMBER SQUARE COIL HEATERS THERMOCOUPLE
REFERENCE (240 VAC) (TYPE J, 36" LEADS)

BUSHING BUSHING ITEM WATTS LENGTH ITEM LENGTH
ASSEMBLY SUB-ASSEMBLY NUMBER NUMBER
GMB5232 GMB0020 SCH3142 315 1.70 TC9600 1.35
GMB5332 GMB0030 SCH3242 315 2.70 TC9700 2.35
Medium Gate-Mate Locating Ring
1.781
5 -18 TAPPED THRU
16
ITEM
NUMBER
2.375 6545

.53 NOTES: 5
1.250 1. Two (2) ⁄16 -18 S.H.C.S. are included with
2.216 DIA. 3.990 DIA. Locating Ring
.218 2. Two (2) Drilled and C’bored holes for
5 ⁄16 -18 S.H.C.S. are on a 1.656 circle radius
in Locating Ring
3. C’bore depth in Top Clamp Plate and C’bore
depth in Locating Ring can be altered to
suit application
DRILLED & C'BORED FOR
7
5
32 -18 S.H.C.S.
16
U.S. 800-626-6653 n Canada 800-387-6600 n dme@milacron.com n www.milacron.com