Explore All Our Bushings

Overview

The Polyshot Heated Sprue Bushing product line was meticulously designed to meet the requirements of precision injection molders processing both engineered and commodity resins. Our heated sprue bushing has a distinct construction featuring a single heater that ensures a more uniform heat profile, with a thermocouple sensing directly at the point of melt flow control. The robust, hardened tool steel body ensures longer heater life, even under demanding molding cycles.

 

The performance and reliability of our Hot Sprue Bushings have set the gold standard for over 30 years. To date, our hot sprue technology has facilitated the production of hundreds of millions of parts for the medical, consumer, automotive, and recreation industries.

 

The profile wound single heater, encased in a removable, tapered stainless steel sleeve, forms an integral part of the hot sprue. This fits over the hot sprue nozzle body, also tapered. Tightening the interface cap forces the assembly together, creating a very tight fit between the hot sprue heater and nozzle body. This precise fit of the hot sprue components contributes to longer heater life and rapid nozzle response time.

 

Polyshot’s Hot Sprue Bushings excel in processing Liquid Crystal Polymers (LCPs), such as Vectra, in addition to other high-temperature materials like PEEK and Ultem. Their melt flow control is paramount for these demanding molding cycles where superior heat transfer is necessary.

Find our Hot Sprue Bushings Data Sheet here.

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Description

The Polyshot bushing length will be shorter at room temperature than when at operating temperature, due to thermal expansion. The heated sprue bushing length will be +.000 to -.010 from the stated dimensions. More exact length requirements can easily be achieved by machining material off the contact surface of the collar face.

 

For a non-standard “A” length to be finished by Polyshot, specify the special “A” length. For a non-standard “A” length to be modified in the field by the customer, order the Polyshot Heated Sprue Bushing with the “blank collar #109” in place of the standard collar.

 

The heaters in the Polyshot Bushing will operate at 208–240 single phase volts AC only. The heated sprue bushing controls temperature by sensing directly at the point of melt flow control, ensuring a more uniform heat profile. This allows the settings on the controller (Firebox) to be approximately 120 °F cooler than the nozzle on the molding machine.

 

All dimensions are in inches. Metric Polyshot heated sprue bushings are available upon request. You can also obtain Polyshot Heated Sprue Bushing drawings at no charge. Get in touch for further information.

Micro bushings .3750" Diameter

075 Series Bushings .7500" Diameter

100 Series Bushings 1.0000" Diameter

Material Compatibility

Conan Microbushing

Description

The Conan Version of the Polyshot Microbushing will allow the molding of very small electrical connectors and the like, with materials including glass filled LCPs and nylons. It is most often used to gate into a cold runner system, which feeds parts through a sub-gate system.

It can be installed directly into the mold with the mold maker machining the gate well detail into the cavity. It can also be furnished with a Conan R gate interface cap to allow installation into a .625″ diameter hole machined into the “A” half of the mold. The Conan R configuration will leave a slight “ring” witness line if gated directly into a molded part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
Conan-Micro-875 0.875"
Conan-Micro-1.375 1.375"
Conan-Micro-1.875 1.875"

To order a Conan Microbushing Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

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Conan 075SC Bushing

Description

The Polyshot Conan 075SC Bushing is installed into a gate well detail machined into the “A” half of the mold by the mold maker. This bushing can also be fitted with a gate interface cap, to allow installation into a .7500″ diameter hole machined into the “A” half of the mold. This configuration will leave a slight “ring” witness line if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
Conan-075-875 0.875"
Conan-075-1.375 1.375"
Conan-075-1.875 1.875"
Conan-075-2.375 2.375"
Conan-075-2.875 2.875"
Conan-075-3.375 3.375"

To order a Conan 075SC Series Heated Sprue Bushing, please submit a request for the quote below.

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Gate Well Detail

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Conan 100C Bushing

Description

Polyshot Conan-100C Bushings are installed into a gate well detail machined into the “A” half of the mold by the mold maker. This bushing can also be fitted with a gate interface cap, to allow installation into a 1.0000″ diameter hole machined into the “A” half of the mold. This configuration will leave a slight “ring” witness line if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
Conan-100C-875 0.875"
Conan-100C-1.375 1.375"
Conan-100C-1.875 1.875"
Conan-100C-2.375 2.375
Conan-100C-2.875 2.875"
Conan-100C-3.375 3.375"
Conan-100C-3.875 3.875"
Conan-100C-4.375 4.375"

To order a Conan 100C Series Heated Sprue Bushing, please submit a request for the quote below.

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Gate Well Detail

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P Microbushing

Description

The Polyshot P Microbushing was designed to be installed in small molds such as those used in the Nissei HM7 injection molding machine and others. Its small size and flow path makes it very well suited to the very small shot sizes used in these applications.

Polyshot P-Microbushing is installed into a gate well detail machined in the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR Gate Interface Cap, to allow installation into a .625″ diameter hole machined in the “A” half of the mold. The PR configuration will leave a slight “ring” witness mark if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
P-Micro-875 0.875"
P-Micro-1.375 1.375"
P-Micro-1.875 1.875"

To order a P Microbushing Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
0.0270 0.2178
0.0280 0.2173
0.0290 0.2168
0.0300 0.2163
0.0310 0.2158
0.0320 0.2153
0.0330 0.2148
0.0340 0.2143
0.0350 0.2138
0.0360 0.2133
0.0370 0.2128
0.0380 0.2123
0.0390 0.2118
0.0400 0.2113
0.0410 0.2108
0.0420 0.2103
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PR Microbushing

Description

The Polyshot PR Microbushing was designed to be installed in small molds such as those used in the Nissei HM7 injection molding machine and others. Its small size and flow path makes it very well suited to the very small shot sizes used in these applications.

Polyshot PR-Microbushing is installed into a gate well detail machined in the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR Gate Interface Cap, to allow installation into a .625″ diameter hole machined in the “A” half of the mold. The PR configuration will leave a slight “ring” witness mark if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
PR-Micro-875 0.875"
PR-Micro-1.375 1.375"
PR-Micro-1.875 1.875"

To order a PR Microbushing Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
0.0270 0.2178
0.0280 0.2173
0.0290 0.2168
0.0300 0.2163
0.0310 0.2158
0.0320 0.2153
0.0330 0.2148
0.0340 0.2143
0.0350 0.2138
0.0360 0.2133
0.0370 0.2128
0.0380 0.2123
0.0390 0.2118
0.0400 0.2113
0.0410 0.2108
0.0420 0.2103
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P-075SC Bushing

Description

The Polyshot P-075SC Bushing is installed into a gate well detail machined in the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR Gate Interface Cap, to allow installation into a .7500″ diameter hole machined in the “A” half of the mold. The PR configuration will leave a slight “ring” witness mark if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
P-075SC-875 0.875"
P-075SC-1.375 1.375"
P-075SC-1.875 1.875"
P-075SC-2.375 2.375"
P-075SC-2.875 2.875"
P-075SC-3.375 3.375"

To order a P-075SC Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
.0270 .2178
.0280 .2173
.0290 .2168
.0300 .2163
.0310 .2158
.0320 .2153
.0330 .2148
.0340 .2143
.0350 .2138
.0360 .2133
.0370 .2128
.0380 .2123
.0390 .2118
.0400 .2113
.0410 .2108
.0420 .2103
Click to Enlarge

PR-075SC Bushing

Description

The Polyshot PR-075SC Bushing is installed into a gate well detail machined in the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR Gate Interface Cap, to allow installation into a .7500″ diameter hole machined in the “A” half of the mold. The PR configuration will leave a slight “ring” witness mark if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
PR-075SC-875 0.875"
PR-075SC-1.375 1.375"
PR-075SC-1.875 1.875"
PR-075SC-2.375 2.375"
PR-075SC-2.875 2.875"
PR-075SC-3.375 3.375"

To order a PR-075SC Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
.0270 .2178
.0280 .2173
.0290 .2168
.0300 .2163
.0310 .2158
.0320 .2153
.0330 .2148
.0340 .2143
.0350 .2138
.0360 .2133
.0370 .2128
.0380 .2123
.0390 .2118
.0400 .2113
.0410 .2108
.0420 .2103
Click to Enlarge

P-100C Bushing

Description

Polyshot P-100C Bushings are installed into a gate well detail machined into the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR gate interface cap, to allow installation into a 1.0000″ diameter hole machined into the “A” half of the mold. The PR configuration will leave a slight “ring” witness line if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
P-100C-875 0.875"
P-100C-1.375 1.375"
P-100C-1.875 1.875"
P-100C-2.375 2.375"
P-100C-2.875 2.875"
P-100C-3.375 3.375"
P-100C-3.875 3.875"
P-100C-4.375 4.375"

To order a P-100C Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
0.0270 0.2178
0.0280 0.2173
0.0290 0.2168
0.0300 0.2163
0.0310 0.2158
0.0320 0.2153
0.0330 0.2148
0.0340 0.2143
0.0350 0.2138
0.0360 0.2133
0.0370 0.2128
0.0380 0.2123
0.0390 0.2118
0.0400 0.2113
0.0410 0.2108
0.0420 0.2103
0.0430 0.2098
0.0440 0.2093
0.0450 0.2088
0.0460 0.2083
0.0470 0.2078
0.0480 0.2073
0.0490 0.2068
0.0500 0.2063
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PL-100-C Gate Well Detail

P-100-C Gate Well Detail
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Gate Ø Gage Dimension
.0270 .2178
.0280 .2173
.0290 .2168
.0300 .2163
.0310 .2158
.0320 .2153
.0330 .2148
.0340 .2143
.0350 .2138
.0360 .2133
.0370 .2128
.0380 .2123
.0390 .2118
.0400 .2113
.0410 .2108
.0420 .2103

P-100DL Bushing

Description

Polyshot P-100DL Bushings are installed into a gate well detail machined into the “A” half of the mold by the mold maker. This bushing can also be fitted with a PR gate interface cap, to allow installation into a 1.0000″ diameter hole machined into the “A” half of the mold. The PR configuration will leave a slight “ring” witness line if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
P-100DL-0.875 0.875"
P-100DL-1.375 1.375"
P-100DL-1.875 1.875"
P-100DL-2.375 2.375"
P-100DL-2.875 2.875"
P-100DL-3.375 3.375"
P-100DL-3.875 3.875"
P-100DL-4.375 4.375"

To order a  P-100DL Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
0.0270 0.2178
0.0280 0.2173
0.0290 0.2168
0.0300 0.2163
0.0310 0.2158
0.0320 0.2153
0.0330 0.2148
0.0340 0.2143
0.0350 0.2138
0.0360 0.2133
0.0370 0.2128
0.0380 0.2123
0.0390 0.2118
0.0400 0.2113
0.0410 0.2108
0.0420 0.2103
0.0430 0.2098
0.0440 0.2093
0.0450 0.2088
0.0460 0.2083
0.0470 0.2078
0.0480 0.2073
0.0490 0.2068
0.0500 0.2063
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PR-100C Bushing

Description

Polyshot PR-100C Bushings are installed into a gate well detail machined into the “A” half of the mold by the mold maker. This bushing allows installation into a 1.0000″ diameter hole machined into the “A” half of the mold. The configuration will leave a slight “ring” witness line if gated directly into the part surface.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
PR-100C-875 0.875"
PR-100C-1.375 1.375"
PR-100C-1.875 1.875"
PR-100C-2.375 2.375"
PR-100C-2.875 2.875"
PR-100C-3.375 3.375"
PR-100C-3.875 3.875"
PR-100C-4.375 4.375"

To order a PR-100C Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

Gate Ø Gage Dimension
0.0270 0.2178
0.0280 0.2173
0.0290 0.2168
0.0300 0.2163
0.0310 0.2158
0.0320 0.2153
0.0330 0.2148
0.0340 0.2143
0.0350 0.2138
0.0360 0.2133
0.0370 0.2128
0.0380 0.2123
0.0390 0.2118
0.0400 0.2113
0.0410 0.2108
0.0420 0.2103
0.0430 0.2098
0.0440 0.2093
0.0450 0.2088
0.0460 0.2083
0.0470 0.2078
0.0480 0.2073
0.0490 0.2068
0.0500 0.2063
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G Microbushing

Description

Polyshot G Microbushings are installed into a .375″ diameter hole machined into the “A” half of the mold. This bushing is also a direct replacement for existing molds that have been constructed with a cold sprue bushing.

This bushing also allows a runner to be machined into the face of the bushing by Polyshot in any configuration, with a maximum radius size of .0625”

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
G-Micro-875 0.875"
G-Micro-1.375 1.375"
G-Micro-1.875 1.875"

To order a G Microbushing Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

Gate Well Detail

G-075SC Bushing

Description

Polyshot G-075SC Bushings are installed into a .7500″ diameter hole machined in the “A” half of the mold. This bushing is also a direct replacement for existing molds that have been constructed with a cold sprue bushing.

This bushing also allows a runner to be machined by Polyshot into the face of the bushing in any configuration, with a maximum radius size of .2500″.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
G-075SC-875 0.875"
G-075SC-1.375 1.375"
G-075SC-1.875 1.875"
G-075SC-2.375 2.375"
G-075SC-2.875 2.875"

To order a G-075SC Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

G-100C Bushing

Description

Polyshot G-100C Bushings are installed into a 1.0000″ diameter hole machined into the “A” half of the mold. This bushing is also a direct replacement for existing molds that have been constructed with a cold sprue bushing.

This bushing also allows a runner to be machined into the face of the bushing by Polyshot in any configuration, with a maximum radius size of .2500″.

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Bushing Body Section

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Click on the part number below to download the files.

Part Number Heated "A" Length
G-100C-875 0.875"
G-100C-1.375 1.375"
G-100C-1.875 1.875"
G-100C-2.375 2.375"
G-100C-2.875 2.875"
G-100C-3.375 3.375"
G-100C-3.875 3.875"
G-100C-4.375 4.375"

To order a G-100C Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

G-150C Bushing

Description

Polyshot G-150C Bushings are installed into a 1.5000″ diameter hole machined into the “A” half of the mold. This bushing is also a direct replacement for existing molds that have been constructed with a cold sprue bushing.

This bushing also allows a runner to be machined into the face of the bushing by Polyshot in any configuration, with a maximum radius size of .2500″.

The G-150C bushing is an excellent choice for large parts.  The G-150C can process engineering resins with a part or shot weight up to 2 lbs.

G-150
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Bushing Body Section

G-150
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Click on the part number below to download the files.

Part Number Heated "A" Length
G-150C-875 0.875"
G-150C-1.375 1.375"
G-150C-1.875 1.875"
G-150C-2.375 2.375"
G-150C-2.875 2.875"
G-150C-3.375 3.375"
G-150C-3.875 3.875"
G-150C-4.375 4.375"

To order a G-150C Series Heated Sprue Bushing, please submit a request for the quote below.

Request a Quote

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