Are Two Spindles Better Than One?

Turning machines with a second spindle can provide a number of benefits to CNC machine shops. For example, they enable the machine tool to automatically transfer a workpiece from one chuck to another for secondary operations such as drilling and tapping, both axially and radially. This “done-in-one” capability greatly reduces part handling, and that translates into lower cost per part. It also improves throughput and allows unattended operation. By adding automatic barfeeders and/or robotic part handling, lights out manufacturing is also a possibility.

Not all 2-spindle turning centers are the same, however. Some machines may have a secondary spindle that is inferior to the primary spindle, thus diminishing these advantages, and others may lack advanced programming capabilities that optimize performance.

With this in mind, here are 5 things to look for when considering adding a 2-spindle turning center to your shop:

1. Programmable Secondary Spindle: Important because it can be programmed to remove the part from the primary chuck to allow back-work machining.
2. Fully Synchronized Spindles: Both spindles can be easily programmed to accelerate and decelerate at the same speed and enable part-off and on-the-fly pass off of parts.
3. Matching Chucks: Both spindles should have identical chucks plus sufficient power and torque for optimum performance.
4. Tool Management: For unattended operation, it’s important that the operator can set up sufficient tools and that the turning center’s control monitors tool wear and automatically replaces worn tools.
5. Smart Programming: Because adding a second spindle means reversing spindle rotation and toolpath direction, the dual spindle lathe should provide a mirroring function that reverses the program for the secondary spindle, making it easier for the operator to program and eliminating the chance of errors.

There’s more to know about dual spindle turning machines, and you can get all of the facts from your Torrance, CA Haas Factory Outlet consultants. Just call (310) 381-0750, email: jphillips@haasfactoryoutlet.com, or visit www.haasfactoryoutlet.com