TheJBS Flexible Guide Bush System

for

CITIZEN

JBS System GmbHMühlenkoppel 9 D-24222 Schwentinental

www.jbs-system.com info@jbs-system.com

Tel: +49 431 530356-0

„We start there, where others have to give up.“

Here at JBS System GmbH, we act according to this principle and we are committed to looking at difficult problems and providing a solution. Founded in 1982, the company has become one of the leading providers of flexible guide bush systems for long automatic lathes over the last 39 years.

Best regardsl

Maik Jeß & Team

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JBS Flexible Guide Bush System

The JBS Flexible Guide Bush System for double-cone collets and pull-collets was developed in order to guide and/or clamp work material rods with a varying external diameter in a rotating as well as a stationary condition in Swiss type automatic lathes. The drive for the flexible guide bush system is via a drive belt, a gearwheel or a driving dog or synchronous drive. Opening, closing and clamping of the guide collets is by means of a pneumatic system with an adjustable pressure piece. The pressure piece presses the guide collet against the fixed spindle cap, the guide collet begins to close and thus surrounds the work material rod.Controlling of the JBS guide bush system is via 4 freely programmable M commands in the machine.

This is what speaks in favour of the JBS System:

• no seizing any more• collet guide runs synchronized to spindle and during the processing adjusts to

material• range of adjustment of the flexible double cone collets are. ±0,4 mm• range of adjustment of this flexible pull collets are + 0.1/-0.3• quick change from collet to collet: maximum 3 minute !• No more the titherto time-consuming and complicated adjustment of the guide collet• easy handling with loading magazine• thanks to this novel system, for the first time ever, the necessary high metal

removal rate in form cutting is made possible• suitable for all materials: from plastics to highalloyed chrome steels in the version

from ground to rolled material according to DIN standard 1013

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The JBS Flexible Guide Bush System

Clamping

Guiding

Pick up

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Opening-Closing-Clampingof JBS Flexible Guide Bush System

One generally differentiates when working with the JBS flexible guide bush system between two methods of working.

One method of working is guiding/sliding the bar workpiece to be machined as is known with rigid guide bushings.

The second method of working is clamping in order to be in a position to perform major milling, boring or impact work on the workpiece.

Opening and closing of JBS flexible guide bush system takes place via the “bar change sub-programme“ together with 2 freely programmable M commands in turning automatic lathes which actuate the opener/closer valve of the pneumatic control unit.

Open: The last workpiece with the sub-programme “cutting off with chamfer“ was completed and now comes the signal “open the guide bush system“. Here the piston pulls the pressure piece back to its end position. The guide clamp opens and the feed bar pulls the remaining piece out of the guide bush.

Closing: The bar change has been conducted fully automatically. The bar workpiece has reached the cut-off position and now the signal comes “close the guide clamp“. The pressure piece is pushed by the piston to its defined position and closes the guide clamp in such a way that the bar workpiece to be machined is fed under an even guide pressure; a secure machining process results.

Clamping is used if milling, boring or impact work has to be performed on the workpiece. Clamping of the guide bush system occurs again via 2 freely programmable M commands in automatic horizontal lathes which actuate the clamping valve of the pneumatic control unit.

Clamping: The workpiece is in the machining process and now milling should take place. The guide bush system is clamped via an M command in the machining programme in such a way that the bar workpiece to be machined is held as in a short lathe. If the machining process is finished then the guide clamp is brought back into its original guiding position via an M command. The machining process on a turning automatic lathe can continue.

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JBS Double Cone Guide Bush System for

CITIZEN

Technical modifications reserved

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CITIZEN

machine type

item no.

JBS guide bush unit

JBS

double cone colletmax. inner-Ø

A3-20 553 type 1 / 28x40 max Ø 20mm

A3-20/25 605 type 2 / 33x40 max Ø 25mm

A2-32 495 type 3 / 42x50 max Ø 35mm

L2-12 606 type 7 / 24x35 max Ø 16mm

L2-20-XII 511 type 1 / 28x40 max Ø 20mm

L2-20/25-XII 513 type 3 / 33x40 max Ø 25mm

L32 VIII 572 type 3 / 42x50 max Ø 32mm

M4-16 509 type 7 / 24x35 max Ø 16mm

M4-32 VIII 440 type 3 / 42x50 max Ø 35mm

CITIZEN

machine typeitem no.

JBS guide bush unit

JBS

pull guide collet max. inner-Ø

A3-20-Z 550 317 / 36x40 bis Ø 20mm

A3-20 / 25-Z 571 378 / 44x40 bis Ø 25mm

A2-32-Z 493 342 / 53x50 bis Ø 32mm

B16-Z 482 346 / 32x40 bis Ø 16mm

D25-Z 590 378 / 44x40 bis Ø 25mm

L12-Z 484 346 / 32x40 bis Ø 16mm

L2-12-Z 612 346 / 32x40 bis Ø 16mm

L2-20 XII-Z 512 317 / 36x40 bis Ø 20mm

L2-20 / 25 XII-Z 560 378 / 44x40 bis Ø 25mm

L32-Z XIII 540 342 / 53x50 bis Ø 32mm

L32 / 38-Z XIII 595 385 / 59x60 bis Ø 38mm

M4-16-Z 510 346 / 32x40 bis Ø 16mm

M4-32-Z VIII 441 342 / 53x50 bis Ø 32mm

M5-32-Z 607 342 / 53x50 bis Ø 32mm

M5-32 / 28-Z 617 385 / 59x60 bis Ø 38mm

JBS Pull System Guide Bush System for

CITIZEN

The JBS digital air control unit for JBS Guide Bush Systems

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The proven JBS System has been further enhanced by a new digital air control unit. Customers can now choose between manual or digital air control for their flexible JBS guide bush system.The digital JBS System is designed to be able to communicate directly with the machine software..

An overview of the function:• Air control unit with proportional valve control and

pressure monitoring • D/A converter for communication with the machine

controls • Input of the commands "guide bush open/closed"

and adjustment of the pressure via NC programme• Infinitely variable adjustment of the air pressure

Your benefits:• Pressure adjustment directly on the machine control

panel• The machine cannot be started if the guide bush is

not closed• The set pressure for each turned part is stored in the

programme• Low wear of the guide tongs due to optimum

pressure adjustment

Spann- und FührungszangenFlexible Führungsbuchsen-SystemeEntwicklung Konstruktion Service

CITIZEN607.0

CITIZEN M532-Z pull version

617.0

CITIZEN M532/38pull version

612.0

CITIZEN L212-Z pull version

607.0

CITIZEN L212double cone version

colletsz-guide collet

type 342 / 53x50 max Ø 32mm

z-guide collet

type 485 / 59x60 max Ø 38mm

z-guide collet

type 346 / 32x40 max Ø 16mm

guide collet

type 7 / 24x35 max Ø 16mm

self opening and

closing device

air control (3 positions opening - closing -

clamping)

Optional -8% -8% -8%

digital

air control

spindle rinsing

conversion kit for

collets in special length

optional equipment

NEWS

02/2021