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

Magazine Bar Feeder

Bar Feeder Basics

Some primary factors are often overlooked when considering how to justify the implementation of a bar feeder for turning operations....MORE

Peak Performance in the Machining Lab

Matching the right equipment for the job and having quality employees to handle the work is paying big dividends for this precision shop....MORE

Bar Feeder Automates Part Production

Designed to boost productivity through streamlined operation, Haas Automation's latest bar feeder model is built for use with Haas ST-10 through ST-35 and DS series CNC turning centers....MORE

EZ-Puller

Bar Puller Features Self-Adjustment

The EZ-Puller, from Accudyne Corporation, addresses a series of bar puller concerns with its own approach to pulling barstock....MORE

Scout 320 Magazine Bar Feeder for Round, Square and Hexagonal Barstock

The Scout 320 is the newest and most economically priced Edge Technologies magazine bar feeder for feeding round, square and hexagonal barstock in a diameter range of 3 - 20 mm and lengths up to 12-ft. into CNC lathes. ...MORE

EZ-Puller

Bar Puller Features Self-Adjustment

The EZ-Puller, from Accudyne Corporation, addresses a series of bar puller concerns with its own approach to pulling barstock. ...MORE

Bar Feeder Automates Part Production

Designed to boost productivity through streamlined operation, Haas Automation's latest bar feeder model is built for use with Haas ST-10 through ST-35 and DS series CNC turning centers. ...MORE

Magazine Bar Feeder

Bar Feeder Basics

Some primary factors are often overlooked when considering how to justify the implementation of a bar feeder for turning operations. ...MORE

Haas Bar Feeder Makes Bar Change-Overs Easy

The Haas bar feeder, which is designed to provide a more simplified and affordable way to automate part production on Haas turning centers, features a re-engineered, heavy duty, yet compact, design that boosts productivity and streamlines turning operations, according to the company. ...MORE