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SST & QST
Split Sheath
Insertion Heaters
SST Split Sheath Insertion Heater
Fig. 001
• 3/8 - 1 Inch Diameter
• 5 - 60 Inch Lengths (SST)
• 5 - 36 Inch Lengths (QST)
• Sheath Temperatures up to
1600°F (871°C)
Applications
• Platens
• Presses
• Dies
• Molds
Description
The SST and QST Split Sheath Insertion Heaters
are designed especially for platen, die or
mold heating applications where the holes are
poorly drilled or worn through age. Independent
expansion of each section of the SST and
QST when energized, creates intimate contact
with the wall of the hole
• Split Sheath design
• Improved conductive heater
• Easily inserted and removed from long holes
• Incoloy® Sheath for long life at extreme
temperatures
• Compacted to maximum density for excellent
element to sheath heat transfer and
dielectric strength
Fig. 20C
QST Quad Sheath Insertion Heater
Terminations
Flexible Leads – SST & QST are available with
flexible lead wires machine connected to the
terminal pins, for temperatures to
850˚F(450˚C). 12” length is standard. Specify
longer length.
Screw Terminals – SST and QST are available
with standard 8/32 x 1” welded nickel plated
steel studs. Easy terminal connections are made
using lugs, leads or bus bar. Stainless steel, and
other thread sizes or lengths are available.
Consult Omega sales.
Nominal Sheath Diameter
Actual Sheath Diameter (±.003)
Minimum Sheath Length
Maximum Sheath Length – SST
Maximum Sheath Length – QST
Minimum Ohms/inch of EHL*
Maximum Ohms/inch of EHL*
Maximum Standard Voltage
Maximum Amperage
Wattage
Resistance
Sheath Length
*EHL: Effective Heat Length
Tolerances and Limitations
SST
QST
SST
QST
SST
QST
Unenergized SST Energized SST
Unenergized QST Energized QST
3/8”
1/2”
.370”
495”
5”
5”
60”
60”
N/A
36”
.278
.308
-
.593
11
21
-
38
240
240
15
30
-
30
±3% up to 20”, ±2% over 20”
5/8”
.620”
5”
60”
36” 36”
.296 .296
.593 .593
21
38
240
40
30
+5% – 10%
+10% – 5%
11/16”
.682”
5”
60”
21
38
480
40
30
3/4”
.745”
60”
36”
.350
.593
480
1”
.995”
5”
5”
60”
N/A
.350
-
26
26
38
-
480
40
40
-
30
SST & QST
Split Sheath Insertion
Heaters (cont’d.)
Fig. 04C Stainless Steel Armor
CableLead Protection
Armor Cable is the best protection against
abrasion or other damage to lead wires. A
straight transition adapter with 12” stainless
steel armor cable and 14” lead wires is
standard. Specify longer length.
Fig. 15C Right Angle Stainless
Steel Armor Cable Lead Protection
Figure 15C Shows an SST Insertion Heater
with right angle stainless steel armor cable
protect leads. Figure DS is for use where
spacing is limited and for wiring convenience.
12” cable and 14” overall lengths are standard.
Specify longer length.
Fig. 17C Right Angle Flexible
Stainless Steel Braided Leads
Figure 17C right angle flexible stainless steel
braid protects lead wires from abrasion and
are full length flexible at right angle orientation
for installations with limited spacing.
12” stainless steel braid with 14” leads are
standard. Specify longer length.
Fig. 10C Mounting Flange
Figure 10Cw is a stop washer or mounting
flange. Specify distance from lead end,
outside diameter and mounting hole centers,
if required.
Adaptor Dimensions
SST or QST*
Diameter
3/8”
1/2”
5/8”
11/16”
3/4”
1”
* QST (QUAD) N/A in 3/8” Diameter
** Not applicable to Fig. 13C or Fig. 17C
Figures
04C, 15C, 13C & 17C
5/8” x 1-1/2”
5/8” x 1-1/2”
3/4” x 1-1/2”
3/4” x 1-1/2”
7/8” x 1-1/2”
1-1/8” x 1-1/2”
Cable
O.D.*
15/32
Fig. 04C
Fig. 13C
Fig. 15C
Ordering Information
To Order — Complete the Model Number using the Matrix provided.
Model
SST Single Split-Sheath Cartridge Heater
QST Quad Split-Sheath Cartridge Heater
Nominal Sheath Diameter
Code
3/8” (QST not available)
375
1/2”
500
5/8”
625
11/16”
687
3/4”
750
1”
1000
Code Insertion Length (inches of shaft)
nnn Enter desired shaft insertion length
Code Voltage
120 Vac 480 Vac
120 480
240
380 Vac
380
Code Wattage
XXXX
5 Other (Consult Sales)240 Vac
Code Termination Option
001
12” Leadwire
10C
Mounting flange/stop washer
15C
Right angle fitting with flexible stainless
steel armor cable (transition 1-1/2” in length)
40C Straight Flexible Stainless Steel Armor Cable
Fitting (transition 1-1/2” in length)
17C Right angle fitting with stainless steel braided
lead protection (transition 1-1/2” in length)
13C Straight flexible stainless steel braided
lead protection (transition 1-1/2” in length)
20C
Threaded post terminal connection
Fig. 10C
Fig. 17C
SST 375 120 1000 15C Typical Model Number6
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