Tapping

Products

Product lines

Facilitation

• RTH-BJ Reversible thread cutting heads

Speed reversal by one direction of machine spindle revolutions.

Tap is protected by the skidding clutch.

Range of thread-cutting: M2÷M20

Suitable for conventional machines (drilling machines).

Models: RTH-BJ 22, RTH-BJ 32, RTH-BJ 42

• Safety thread-cutting heads

Safety clutch for taps protection.

For speed reversal is necessary to change machine's revolutions.

Range of thread-cutting: M2÷M52

Suitable for conventional and CNC machines.

Models: Zhb 21, Zhb 31, Zhb 41, Zhb 51

• Zhb A – Safety thread cutting heads with exchangeable bush

This model is used for quick change adaptors for thread-cutting. Safety clutch is part of the head, it isn't part of quick change adaptors type NVH and RVK.

Range of thread-cutting: M3÷M20

Models: Zhb 21A, Zhb 31A, Zhb 41A

• Zhp – Quick change tapping heads

Possibility of quick change adaptors clamping.

Adaptors with or without safety clutch.

Range thread-cutting: M2÷M33

Usage on NC and CNC machine tools.

Models: Mexin 610, Mexin 620, Mexin 630

• Diagram of ordering RTH-BJ (PDF)
• Diagram of ordering Zhb (PDF)
• List of exchangeable adaptors for chucks type Zhp (PDF)

• Download complete catalogue or parts in PDF

Models of thread-cutting chucks Zhp

• Mexin 610 – axial compensation with possibility of setting-out, clamping to the collets with square
  M610.XX.12 M3÷M12
  M610.XX.20 M4÷M20
  M610.XX.33 M8÷M33
• Mexin 620 – axial compensation, quick change adaptors RK M621, M622
  M620.XX.12 M3÷M12
  M620.XX.20 M8÷M20
  M620.XX.33 M14÷M33
• Mexin 630 – without axial compensation (hard cutting), quick change adaptors RK
  M630.XX.12 M3÷M12
  M630.XX.20 M8÷M20
  M630.XX.33 M14÷M33

Manuals for Thread-cutting heads - download in PDF

RTH - Reversible thread-cutting head

• Návod RTH.pdf (0,4MB) - česky

• Instructions RTH.pdf (0,4MB) - english

• Anleitung RTH.pdf (0,4MB) - deutsch

• Инструкция RTH.pdf (0,4MB) - πο-русски

Zhb - Safety thread-cutting head

• Návod Zhb.pdf (1,4MB) - česky

• Instructions Zhb.pdf (1,1MB) - english

• Anleitung Zhb.pdf (1,1MB) - deutsch

Zhp - Quick change tapping heads
M610, 620, 630

• Návod M610.pdf (1,8MB) - česky

• Instructions M610.pdf (1,8MB) - english

• Návod M620.pdf (1,1MB) - česky

• Instructions M620.pdf (1,1MB) - english

• Návod M630.pdf (1,1MB) - česky

• Instructions M630.pdf (1,1MB) - english

Facilitation

• List of all manuals – download in PDF
• RTH - list of spare parts (PDF)
• Zhb - list of spare parts (PDF)

  Including NHV a RVK

• The most often questions (FAQ) RTH and Zhb (PDF)
• Quick change adapters type RK621, RK622 for Zhp (PDF)
• Collets ER for taps (PDF)

Frequently asked questions (FAQ)

• Is it possible to cut threads in impassable slots to the bottom with these heads?

YES it is possible, both types RTH and Zhb have skidding clutch, so if it is correct adjusted, the screwing tap can not be break off. But WE DO NOT RECOMMEND this way of using, it is too fierce and not safe everytime. Especially by bigger diameters of screwing taps.

• What difference is between heads RTH and Zhb?

Head RTH is designed only for right hand threads, it has own speed reversal and skidding clutch that defends screwing tap against torsion failure. Further it has off position which is exploited during threading noncontinuous threads. Head Zhb is designed for right hand and left hand threads and has skidding clutch and possibility of axial compensation for case when machine spindle feed is different from the value of pitch. ATTENTION! Head RTH must everytime revolve, head Zhb not. Type Zhp is designed for machining centres. It consists of holder and exchangeable taper shank which can be with or without skidding clutch. Up to the type of head Zhp enables axial compensation.

• What use is scale on the sleeve by which is torsion moment adjusted?

Scale does not say anything about torsion moment. It identifies place of sleeve on the body of the head.

• Which older thread cutting heads does NAREX MTE repair?

Heads ZHR20, ZHR30 and heads Zhb2, Zhb2A,Zhb3 and Zhb3A are repaired if are spare parts on the stock.

• Can be these thread cutting heads used on lathe?

Heads Zhb - YES, heads reversible RTH - NOT.

• Is for screw tap clamping to the head better collet RUBBER FLEX or plastic collet?

Collet RUBBER FLEX simultaneously centralizes and clamp screw tap. Plastic collet only centralizes screw tap and with worse accuracy. Anyway collet RUBBER FLEX is more favourable though it is more expensive.

• Are plastic collets used on now produced thread cutting heads?

They are used only on exchangeable chucks NVH 2 and NVH 3, which are designed for thread cutting heads type "A" for fast tools exchange.

• Is it possible to use heads RTH and Zhb to forming screwing taps clamping?

It is possible, but ATTENTION! Especially by heads RTH can not be diameter of forming screwing tap bigger than is half of head work range. For example: we do not clamp forming screwing tap to head RTH 22 but to RTH 32. It is because of the big beats during reverse revolutions what makes for premature attrition or head destruction.

• What revolutions are suitable for thread cutting heads?

Revolutions are chosen according to recommended cutting speed which is given by producer or supplier of screwing taps. Each thread cutting head has only narrow maximum revolutions.

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 Ltd.

sales department

Moskevska 659/63

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: +420 246 002 249, e-mail: sales@narexmte.cz, fax: + 420 246 002 335

NAREX MTE s.r.o.

Moskevska 659/63

CZ-101 00 Prague 10
Czech Republic

Tel:

Fax:

+420-246 002 321

+420-246 002 249

+420-246 002 335

+420-246 002 343

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.

Moskevska 659/63

CZ-101 00 Prague 10
Czech Republic

Tel:

Fax:

+420-246 002 321

+420-246 002 249

+420-246 002 335

+420-246 002 343

e-mail: sales@narexmte.cz

http://www.narexmte.cz