Zone: Bar Feeds

OVERVIEW: Bar feeders are perhaps the most common automation accessories used in metalworking. Generally applied to turning machines they, are designed to deliver a continuous supply of raw machining stock in the form of round, hex, square, and extruded shapes for the manufacture of parts of rotation. Able to accommodate stock of 20, 12, 6 and 4 foot lengths, the bar feeder attached to the machine tool at its headstock end. There are two common types of bar feeds available: hydrostatic and hydrodynamic. In hydrostatic bar feeds, the bar rests in a series of channels that clamp down on the top and bottom of the stock to hold it in place. In the hydrodynamic bar feeds, the stock is held in a feed tube surrounded by pressurized oil. This allows for faster spindle speeds, but it also increases change-over time from one bar diameter to another. Increasingly, bar feeders are being equipped with "magazine" storage units that are capable or significantly increasing the amount of stock that can be run unattended through the machine tool. In some "light's out" untended machining operations these magazine feeders can supply enough stock for a machine to run a full shift without intervention. Historically bar feeders are applied in single spindle turning machine tools, multi-spindle machines and some rotary transfer machines. Several machine builders have recently incorporated the bar feeder on vertical machining centers. Among the drivers for this development are simplified fixturing for the machining center, continuous supply of blank material for longer production runs, and the ability to perform 5 and 6 sided machining to produce complete parts. Bar Feeder Trends: Quick change guide channels Remnant reduction Bar fed machining centers Short length bar feeders Magazine fed bar feeders Untended light’s out machining Swiss type bar feed response Double pusher design Bar whip reduction

Featured Zone Content

Laser Device Helps to Align Bar Feeders

One of the most common issues affecting bar feeder performance is wear and tear on the bar feeder liner or collet caused by inaccurate alignment between the bar feeder and the lathe....MORE

Barfeeding Small Diameters

This shop may be located off the beaten path but it’s certainly found a successful and profitable home by applying top of the line technology to its medical part production mix. ...MORE

                        Quick Load Servo S3 T Automatic Magazine Bar Feeder

Fully Automatic Magazine Bar Feeder Incorporates Web Technology

LNS America’s Quick Load Servo S3 T automatic magazine bar feeder loads ¼"- to 4 ¾"-diameter barstock in lengths ranging from 4" to 63", not to exceed overall spindle length. ...MORE

Bar Feeder Offers Space Savings

Edge Technologies FMB 20-100 bar feeder includes quick-change polyurethane guide channels that allow for quiet operation at high RPM while feeding round, square or hex barstock. ...MORE

Bucci Boss IV.

Bar Feeder Instantly Synchronizes with Headstock

Bucci Industries will introduce the latest addition to its Iemca Boss line of heavy-duty automatic magazine bar feeders, the Bucci Boss IV, which is said to reduce bar-change time by as much as 40 percent. ...MORE

Lexair Mini Rhinobar bar feeder

Bar Feeder Centers Barstock with Hydrodynamic Principle

Lexair’s Mini Rhinobar bar feeder automatically centers and feeds small-diameter barstock for Swiss-type CNC screw machines and small fixed- or sliding-head lathes. ...MORE

Master 80HF-12 Bar Feeder Offers Fast Change-Over

The IEMCA Division of Bucci Industries USA’s Master 80HF bar feeder is the ideal 12-ft. bar feeder for those lathes where machining operations vary frequently during the course of the day or for dedicated production running at high speeds, the company says. ...MORE

PMTS 2013