Overview

The Polyshot Heated Sprue Bushing product line was developed to address the precision injection molders need to process both engineered and commodity resins. Polyshot’s unique construction features a single heater, with a thermocouple sensing directly at the point of melt/freeze with a hardened tool steel body. The performance and reliability of our Hot Sprue Bushings have set the gold standard for over 30 years. To date, we have produced hundreds of millions of parts for the medical, consumer, automotive, and recreation industries.

The profile wound single heater is encased in a removable, tapered stainless steel sleeve. This fits over the nozzle body which is also tapered. When the interface cap is tightened it forces the assembly together creating a very tight fit between the heater and nozzle body. This precise heater fit, adds to the long heater life and rapid nozzle response time.

Polyshot’s Heated Sprue Bushings are excellent at processing Liquid Crystal Polymers (LCPs), such as Vectra, in addition to other high-temperature materials such as PEEK and Ultem.

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. Heated length will be +.000 to -.010 from 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 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. Because the Polyshot Bushing controls temperature by sensing directly at the point of melt/freeze, the settings on the controller (Firebox) will 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. All Polyshot Heated Sprue Bushing drawings are available at no charge. Consult Polyshot 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"

Gate Well Detail

To order a Polyshot Conan Microbushing Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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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"

Gate Well Detail

To order a Polyshot Conan 075SC Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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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"

Gate Well Detail

To order a Polyshot Conan-100C Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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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"

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
Click to Enlarge

To order a Polyshot P Microbushing Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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"

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
Click to Enlarge

To order a Polyshot PR Microbushing Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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"

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

To order a Polyshot P-075SC Bushing Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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.

Click to Enlarge

Bushing Body Section

Click to Enlarge

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"

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

To order a Polyshot PR-075SC Bushing Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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.

Click to Enlarge

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"

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
Click to Enlarge

To order a Polyshot P-100C Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.


PL-100-C Gate Well Detail

P-100-C Gate Well Detail
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To order a Polyshot P, PL or PR-100 Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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"

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
Click to Enlarge

To order a Polyshot PL-100 Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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.

Click to Enlarge

Bushing Body Section

Click to Enlarge

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"

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
Click to Enlarge

To order a Polyshot PR-100 Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.

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"

Gate Well Detail

To order a Polyshot G Microbushing Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.
  6. If a runner is required, a file must be provided.

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″.

Click to Enlarge

Bushing Body Section

Click to Enlarge

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 Polyshot G-075SC Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.
  6. If a runner is required, a file must be provided.

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″.

Click to Enlarge

Bushing Body Section

Click to Enlarge

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 Polyshot G-100C Series Heated Sprue Bushing, specify these items:

  1. The bushing part number.
  2. The molding machine nozzle radius size: (1/2″ or 3/4″)
  3. The material to be processed.
  4. A general part description.
  5. The approximate part weight in grams.
  6. If a runner is required, a file must be provided.