Sprue extenders are useful for multiple purposes. Standard sizes from 1 to 5 inches long. Non standard lengths available upon request. (at an additional charge)
1. Often a large bait in a mold with a short sprue and runner needs more plastic to draw upon as it cools. A sprue extender expander increases the amount of plastic in the reservoir to the cavity.
2. A sprue extender can extend the height of molds so that you can easily inject multiple molds of different heights when clamping them together.
- The sprue extenders are machined to 0.630" for a depth of approximately .25 inches to accomodate many standard 5/8 inch (.0625) nominal size hand injecters.
- The nipple that fits into your mold is sized at 0.620" so that it should fit into most common hand injection plastisol bait molds.
- The nipple reaches approximately .25 inches into your mold sprue.
- The overall length is the advertised length plus the length of the nipple that goes into the mold. ie) a 3 inch extender insert into a 3 inch mold will place the top at 6 inches.
- Nominal outside dimension is 3/4 inch (0.75").
- Internal passage dimension (ID) is 1/2 inch (0.50").
- The overall external finish is left as the stock came from the mill in order to keep costs down.
- Other size sprue extenders can be made, but non standard sizes will cost a few dollars more.
- Sizes 1-3 inches long are all priced the same as machining is the majority portion of the cost. Longer sizes cost more as deeper machining takes a couple extra steps.
You can save money on this item when you purchase several at a time. The table below shows the minimum quantities required to benefit from this offer, and how much they'll cost.
Quantity |
Price per unit |
10+ |
$12.95 |