We strive to bring you the newest, most precise products on the market. Some of our latest:
- Collet Fixtures for Rotary Tables on VMC
With Rotary tables being the norm for most VMC, we offer a variety of workholding fixtures from manual to air operated.
One of our most popular items is the 5C manual collet fixture (part# 20011). This style fixture is ideal for holding round parts with a 5C collet. Being that 5C collets are available in a variety of shapes and sizes it makes for a quick and simple setup! In addition they use a true length design, which eliminates movement on your linear lengths should the OD of the part you are holding vary in diameter! This same style fixture is available in a 16C & 3J collet offering. click on the following link to view: https://www.roviproducts.com/collet-fixtures-air-manual/5c-16c-or-3j-single-station-collet-fixtures/
For those that are looking for a more automated system we have a selection of air or hydraulic fixtures that easily mount to a 4th axis rotary table. These units are also offered in a true length, or pull back design. You will need to note that should your application require an expanding collet to hold the ID of the part, you will need to choose a pull back designed fixture, as most expanding collets are dead length when actuated by a pull back style collet fixture! Click on the following link to view air collet fixtures: https://www.roviproducts.com/collet-fixtures-air-manual/
If you operate in an environment which involves short runs and many different part changes, there is even a fixture that has quick change collets. This style fixture is available in either a manual configuration or hydraulic.
- Collet Fixture for Laser and Welding ApplicationsIf you are performing a welding operation or doing laser engraving we offer a specific 5C air collet fixture for these types of operations. The 20022-W air collet closer is designed for welding and laser applications. It can be adapted to a welding lathe or laser spindle or rotary welding table. The collet closer is actuated with a four way air valve for air open, air closed operation. During the welding operation the air is valve is in a neutral position, this limits drag on light duty spindles. The unit can operate standard 5C collets, internal collet heads and oversized machineable collet heads. The unit is supplied with a 5C collet wrench. There are four 3/8-16 threaded holes 90 degrees apart on a 4.500” bolt circle for attaching to a fixture plate. The air ports are 1/8-27 pipe threads. For more information please contact (Ron Posen) email@example.com / 800-423-5145
- Expansion Range of Expanding Collets
I get a lot of inquiries asking, “how much expansion can you get from our expanding collets”? Most expanding collets that are activated by a screw pulling back into the front taper of a collet will only have a maximum expansion of .010”. The reason being, if the collet is expanded beyond .010”, you will experience what we at Rovi call “flowering of the collet ”. Flowering is when the collet is expanded to the point that the Expanding Collet will not go back to its original position once the screw is released to unclamp the collet.
If you flower the collet, you will not be able to load the next part on the collet. This is because the stress induced in the material will not allow for it to settle back to is original diameter, thus making it over-sized and not allowing for your other parts to slide onto the collet.
However, if the Expanding Collet is made from a material that is heat treatable such as 4140 or 4130, you will be able to get a little more expansion out of the collet (.011”-.015”). The hardness introduced into the collet with heat treat has made it more rigid and able to retain more memory in the material.
If you do require a collet that needs to expand beyond the .010”, we do offer a system in which the collet is expanded on both ends by being pulled onto a shaft that has a taper on the front and back side. This style collet has an expandable range of .015”. They are a little more costly, but do work well. Need more info? Do not hesitate to contact us to go over your specific applications. 800-423-5145.
Click on the following link for more info on Expanding Collets: Expanding Collet Page