Thread Rolling

Products

Product lines

Facilitation

• Holders of knurling tools DVR

Holders are designed for knurling of external cylindrical surfaces
Usable machine tool - lathe

Rolling between pair of knurling wheels

Self-centring Holder

Models: DVR 20-8, DVR 20A-8, DVR 20-2,
DVR 20-1

• Zhv, Zhvu – Thread-rolling heads

High effective tools intended for manufacturing of the outer threads through the cold rolling-axial method.
Heads are used on universal lathes, turret lathes, drilling machines and on automatic lathes.
Range of thread-rolling M3÷M60 up to the type of head and rollers.

• Reamers without guide bush T

Designed for manual reaming of holes in range 7.6÷60mm up to the type of reamer.

Reamers can be delivered in sets:
ST12 10.25÷33mm or ST6 13.75÷24mm

• Tools for thread rolling

Roller dies for in-feed and axial rolling

Roller dies for knurling

Flat dies
Planetary dies
- usage on thread-rolling machines

• Holders of knurling tools DVR (PDF)
• Reamers without guide bush T (PDF)
• Rollers for thread rolling heads Zhv, Zhvu and RK (PDF)

• Download complete catalogue or parts in PDF

Models of thread rolling heads

• Thread rolling heads - fixed
  Zhv 3 - 5  M3÷M5
  Zhv 6 -10 M6÷M10
  Zhv 8 -16 M8÷M16
  Zhv 12-20 M12÷M20
  Zhv 20-30 M20÷M30
• Thread rolling heads - universal
  Zhvu 12-20 M12÷M20
  Zhvu 20-30 M20÷M30
  Zhvu 30-60 M30÷M60
  
  Universal heads can be used for rolling trapezial threads.

Manuals for Thread rolling heads - download in PDF

RK, Zhv - Thread rolling head

• Návod Zhv(RK).pdf (0,3MB) - česky

Facilitation

• List of all manuals – download in PDF
• Rolling disks for Thread rolling heads Zhv, Zhvu a RK (PDF)
• Holder Dzhv for clamping Thread rolling heads (PDF)
• The most often questions (FAQ) Zhv, Zhvu, RK (PDF)
• The most often questions (FAQ) DVR (PDF)

Frequently asked questions (FAQ)

• What is usage of thread rolling heads?

By heads can be rolled thread on roller ovenware. This operation can be done on lathe, it is not necessary thread rolling machine.

• What heads do you produce?

NAREX MTE produces and deliveres axial thread rolling heads fixed Zhv and universal heads Zhvu or heads RK (heads RK NAREX MTE does not produce, only sells).

• What threads can be rolled by these heads?

By fixed heads Zhv with unchanging slope of rolling disks can be rolled only sharp threads like metric - M, Whitwhorts - BSW, inch - UN, roller piped - G.
By universal heads Zhvu or RK with changeable slope in range 0 - 5,5°, is possible to roll sharp threads, trapezial threads and round threads Rd.

• Is necessary for left run thread left head?

In case of fixed head Zhv - YES, in case of universal head Zhvu or RK - NO.

• Why is impossible to roll with fixed head Zhv trapezial thread (Tr)?

For trapezial threads (Tr) rolling is necessary bigger angel of rolling disks than has fixed head Zhv.

• What more except rolling head is need for it?

Mainly thread rolling disks which are given according to type and size of the head and type and size of thread which we want to roll. Further we can need holder Dzhv for clamping head to the lathe.

• Where is head clamped to the lathe?

With holder Dzhv is clamped to tool head of lathe. On turret lathe is clamped to turret head, with special holder is possible to clamp it also to lathe tailstock.

• What to do with head before start of rolling?

A - on head put rolling disks in sequence according to instructions for use / B - head clamp to the machine / C - align head according to lathe spindle axial / D - set head in light of middle diameter of rolling thread / E - wind up the head

• What to do with machine?

A - clamp head / B - choose suitable spindle revolutions according to rolling speed / C - arrange stop on linear saddle in place where should head open / D - set up cooling oil

• Is any demand on semiproduct on which will be thread rolled?

A - semiproducts material must have mechanical characteristics which allowed cold volumetric forming / B - semiproducts diameter must be same like value from instruction for use / C - semiproducts face must have slope according to instructions for use

• Which material can be cold-rolling?

Constructional and alloyed steel with fort limit to 900 MPa and ductility higher than 8%. Free cutting steel is unsuitable for cold rolling. Further aluminium alloy, copper alloy etc.

Product repairing

NAREX MTE standardly provides repairs of produced and delivered products. There are guarantee repairs or normal non guarantee repairs. During repair is product dismounted, there are found defective parts and up to it is determined range and price of repair. After customer´s repair price confirmation are defected parts exchanged, product is again mounted and tested.

Repair speeding

For repair speeding and lower price is suitable to enclose to repair order letter with information about problems (during which conditions defects occurs or indicate required range of repair).

Repair ordering

For repair ordering you should send product for repair, order of repair and specifications of defects on our address:

NAREX MTE s.r.o.

sales department

Kreslicka 1, building D

CZ-101 00 Prague 10
Czech Republic

Information about repair

About repair you will be informed by e-mail or by phone, with any questions you can contact export department on phone: +420 725 551 171, e-mail: sales@narexmte.cz.

NAREX MTE s.r.o.

Kreslicka 1, building D

CZ-101 00 Prague 10
Czech Republic

Tel:

+420-725 551 171

+420-602 675 763

e-mail: sales@narexmte.cz

http://www.narexmte.cz

Support

Basic technical information you can find also on reference service.

NAREX MTE s.r.o.

Kreslicka 1, building D

CZ-101 00 Prague 10
Czech Republic

Tel:

+420-725 551 171

+420-602 675 763

e-mail: sales@narexmte.cz

http://www.narexmte.cz