Got a question you don't see here, send us an email.
Click each question to see the answer.

1. Why do the installation instructions advise to tighten/loosen the jam nut only when the unit is locked and preloaded (set)?
2. Does the core really compress like the catalog says?
3. As this is a hydraulically driven unit, does pressure need to be on the unit to maintain lock up? How much?
4. Setting up the units requires some "dialing in". I don't want to lose that when I need to disassemble and service the cores. What are my options?
5. The catalog recommends certain bolt sizes and quantities. I have a retrofit application with a set bolt pattern. While the KOR-LOK™ is a good fit for the application I can't match the bolt requirement. Is it possible to deviate from the suggested bolt pattern?
6. We run 3 shifts 24/7 at our plant. How do we get local/phone support during off hours?
7. Where are the set up instructions for the KOR-LOK™ systems?
8. What kind of sensors do you have? How do I wire them in to my press?
9. I have a retrofit application in which standard hydraulic cylinders are not holding. I need to get parts to the customer by next week. What can I do?
10. I have a parting line application. How can I mount your system effectively when I can only use bolts on half of the flange?

Got a question you don't see here, send us an email.

1. Why do the installation instructions advise to tighten/loosen the jam nut only when the unit is locked and preloaded (set)?
A. When the KOR-LOK™ lock engages, proper adjustment of the unit will yield a large preload. The forces of the preload are distributed over the shoulder stop on the core, compressing it and also the flange bolts and thread of the unit which stretches these. While the amount of compression and stretch is small, tightening the jam nut prior to proper loading of the system has been know to cause the nut to come loose during operation. Return to top.

2. Does the core really compress like the catalog says?
A. Yes. Steel compresses. How much is determined by several factors such as length of the core body/stroke, hydraulic diameter and force of injection. Some cores only compress a few thousandths of an inch. Some compress 0.030 or 0.040. The advantage of the KOR-LOK™ system is that it will PRECOMPRESS the core system so that during normal injection there is no movement of the core. Return to top.

3. As this is a hydraulically driven unit, does pressure need to be on the unit to maintain lock up? How much?
A. No. Another advantage of the KOR-LOK™ system is the ability to maintain precompression even when hydraulic pressure is depleted. We recommend 1500 psi to permit proper operation and full preload function, but once the mechanical lock does its job, it will remain fully loaded even with no hydraulic pressure. Return to top.

4. Setting up the units requires some "dialing in". I don't want to lose that when I need to disassemble and service the cores. What are my options?
A. Once proper adjustment is achieved, the jam nut will lock the unit in place. Provided you have a common mount which employs our mounting flange, simply unbolt the flange and remove the entire system. This way your jam nut is still locked down and your position will be maintained upon reinstallation. Return to top.

5. The catalog recommends certain bolt sizes and quantities. I have a retrofit application with a set bolt pattern. While the KOR-LOK™ is a good fit for the application I can't match the bolt requirement. Is it possible to deviate from the suggested bolt pattern?
A. Yes. The recommended bolt pattern and quantity is just that; a recommendation. It is possible to deviate from the catalog recommendation as long as the integrity of the application is intact. In other words, The KOR-LOK™ will GENERATE up to the catalog force rating. Custom mount brackets and bolt sizes/patterns should be made to withstand the expected forces along with a safety margin. Our Applications Specialists can assist with custom application reviews. Return to top.

6. We run 3 shifts 24/7 at our plant. How do we get local/phone support during off hours?
A. You will find a great deal of helpful information on this web site including CAD files, Installation and Set Up Procedures, Sensor Wiring information, and much more. However, if you need to speak to an Application Specialist, PFA's Emergency Hotline is available 24 hours a day. The hotline will connect you to a LIVE PERSON who will take your information and contact a PFA representative immediately. As there are 3 representatives on call each day, a qualified individual will contact you in a matter of minutes. The Emergency Hotline number is 1-888-296-6663. E-mail is also available for issues that do not require immediate assistance but can be attended to the next business day. The e-mail address is: support@pfa-inc.com. Return to top.

7. Where are the set up instructions for the KOR-LOK™ systems?
A. Each unit is shipped with a set of instructions. If they are not in the box/crate, contact our office at (262) 250-4410 to have them faxed or they are also available online - click here. Return to top.

8. What kind of sensors do you have? How do I wire them into my press?
A. Our sensors are custom made for us to provide you with a universal solution to your wiring needs. The sensors utilize an open contact which closes when activated. This means that you can pass your voltage through whether it is 24VDC or 110VAC. Our sensor act much like a mechanical limit in that they simply pass the signal through. This means they will work on ANY press ANYWHERE. For detailed wiring instructions and technical data on our sensors click here. Return to top.

9. I have a retrofit application in which standard hydraulic cylinders are not holding. I need to get parts to the customer by next week. What can I do?
A. PFA is an industry leader when it comes to service. We have the capability to review your application, recommend a course of action, process an order and ship product for that order all in the SAME DAY. We have a constant supply of inventory and are able to restructure the production schedule to provide what can only be called "IMMEDIATE SERVICE". Return to top.

10. I have a parting line application. How can I mount your system effectively when I can only use bolts on half of the flange?
A. Proper load distribution is critical to proper function of the KOR-LOK™ system. A means of load support on both sides of the parting line is required for a successful application. An example of an effective method can be found here. Our Application Specialists can assist with custom needs as well. Return to top.

Got a question you don't see here, send us an email.