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Low-clearance lead screw nuts
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What should you do in the event of unwanted axial clearance?

Zero backlash

Zero-backlash lead screw nut

For a lifetime of minimal axial backlash
Ideal for precise positioning and
     infeed movements
More information
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Low clearance

Low-clearance lead screw nut

Ensure consistent axial
     and radial pretension
Very smooth running
More information
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Anti-backlash

AB lead screw nut

Pretension by means of a spring load meter
Significant reduction in self-excited
oscillations and vibrations
More information
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Pre-load lead screw nuts

Pre-load lead screw nuts

Maximum positioning accuracy
Ideally suited for small gradients
Cost-effective alternative to zero backlash nut
More information
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What is the axial clearance?
Yellow = Axial clearance

What is axial clearance anyway?

Axial clearance can be used to describe the lost motion, the "dead travel", on the lead screw as a result of the gap between the lead screw and the lead screw nut. The term clearance is also often associated with it, but the correct technical term is axial clearance. It is therefore the movement of the lead screw nut in the axial direction without movement of the lead screw. Lead screw units require a minimum clearance to maintain their function. If the axial clearance is too small, the torque required to move the lead screw nut will also increase. In addition to the axial clearance caused by the manufacturing tolerances, application-specific influences must also be taken into account. In addition to thermal and hygroscopic environmental influences, the minimum clearance to be considered in the application must also take into account the friction heat generated by the application. This plays a decisive role in connection with the expansion behaviour of the polymer material used. As the axial clearance in the system can change with temperature fluctuations.

What options does the igus product range offer in this case?

To reduce the unwanted axial clearance, in addition to the correct choice of material, a preload mechanism has proven to be an effective measure. There are four variants with pretension for our dryspin® high helix thread and trapezoidal threads: zero backlash, low clearance, preload and AB lead screw nut. Here you will find all the advantages and assembly instructions for our clearance-reduced lead screw nuts.
 
For applications with high loads, high temperatures or in heavily polluted environments, a standard lead screw nut should always be used. The reason for this is that all three principles are cancelled out by too high loads. For this reason, the maximum static axial loads are specified separately for each lead screw nut model.
Low-clearance lead screw nuts

Zero-backlash lead screw nut
Zero-backlash lead screw nut
Technical data

Information

One of the most precise solutions is the ZB lead screw nut. It consists of several components and adjusts itself to the service life. It is particularly suitable for lead screw drives with high helix threads for quick adjustment of small loads. The clearance-free principle ensures minimal clearance over the entire service life. Ideal for precise positioning and feed movements in medical, laboratory and printing technology as well as in the broad areas of bio-sciences.
 
The lead screw nut consists of a support nut, an adjusting ring with torsion spring, a friction disc and the axial element. With the help of the torsion spring, the preload is brought into the lead screw system.
 
► Life-long minimum axial backlash
► Precise positioning and infeed movements
 
► In dryspin® and drylin® high helix thread
► Flange lead screw nut
► Thread direction: RH
► Material: iglidur® J
 
Technical data

Technical data


Thread
Max. static F axial
[N]
Max. idling torque
(with spring)170 
from [Nm]

Part number
Ds5x5
75
0.02
DST-JFRM-ZB-0001-DS5X5
Ds6.35x2.54
75
0.005-0.02
DST-JFRM-ZB-0001-DS6.35X2.54
Ds6.35x5.08
75
0.005-0.02
DST-JFRM-ZB-0001-DS6.35X5.08
Ds6.35x12.7
75
0.005-0.02
DST-JFRM-ZB-0001-DS6.35X12.7
Ds6.35x25.4
75
0.005-0.02
DST-JFRM-ZB-0001-DS6.35X25.4
Ds8x10
150
0.01-0.03
DST-JFRM-ZB-0001-DS8X10
DS8x15
150
0.01-0.03
DST-JFRM-ZB-0001-DS8X15
Ds8x24
150
0.01-0.03
DST-JFRM-ZB-0001-DS8X24
Ds10x12
150
0.01-0.04
DST-JFRM-ZB-0001-DS10X12
Ds10x25
150
0.01-0.04
DST-JFRM-ZB-0001-DS10X25
Ds10x50
150
0.01-0.04
DST-JFRM-ZB-0001-DS10X50
Ds12x3
500
0.08
DST-JFRM-ZB-0001-DS12X3
Ds12x5
500
0.08
DST-JFRM-ZB-0001-DS12X5
Ds12.7x12.7
500
0.08
DST-JFRM-ZB-0001-DS12.7X12.7
Ds12x15
500
0.08
DST-JFRM-ZB-0001-DS12X15
Ds12x25
500
0.08
DST-JFRM-ZB-0001-DS12X25
Ds14x4
500
0.08
DST-JFRM-ZB-0001-DS14X4
Ds14x25
500
0.08
DST-JFRM-ZB-0001-DS14X25
Ds14x30
500
0.08
DST-JFRM-ZB-0001-DS14X30

170)  The idling torque of the zero-backlash lead screw nut increases with service life. For calculating and designing purposes, it is recommended that max. idling torque must be taken into account. 

Low-clearance lead screw nut
Low-clearance lead screw nut
Technical data
Yellow = Axial clearance

Information

Our LC lead screw nuts are all equipped with two elastomer O-rings. The functional principle is similar to the AB lead screw nut. However, with the help of the LC lead screw nut, a reduction in clearance can be achieved in this case. The O-rings apply a circumferential radial preload to the thread system, pressing the flanks of the lead screw nut and the threads of the lead screw. This ensures a constant axial and radial preload of the nut. The high operational smoothness and cost-effective purchase are further advantages of the LC lead screw nut.
 
Reduced axial clearance due to circumferential radial preload 
► High operational smoothness due to reduction of possible vibrations
► Cost-effective alternative to zero-backlash nut
 
In dryspin® high helix and trapezoidal thread up to thread diameter 14mm
Flange lead screw nut
► Direction of thread: RH
► Material: iglidur® J
 
Technical data

Technical data

dryspin® high helix thread



Thread
Max.
static 
F axial 
[N]
Max. id
ling torque
(with O-ring) from 
[Nm]


Part number
Ds6.35x2.54
40
0.005
DST-JFRM-LC-0001-DS6.35X2.54
Ds6.35x5.08
40
0.005
DST-JFRM-LC-0001-DS6.35X5.08
Ds6.35x12.7
40
0.005
DST-JFRM-LC-0001-DS6.35X12.7
Ds6.35x25.4
40
0.005
DST-JFRM-LC-0001-DS6.35X25.4
Ds8x10
75
0.01
DST-JFRM-LC-0001-DS8X10
DS8x15
75
0.01
DST-JFRM-LC-0001-DS8X15
Ds10x12
75
0.01
DST-JFRM-LC-0001-DS10X12
Ds10x25
75
0.01
DST-JFRM-LC-0001-DS10X25
Ds10x50
75
0.01
DST-JFRM-LC-0001-DS10X50
Ds12x5
125
0.03
DST-JFRM-LC-0001-DS12X25
Ds12x25
125
0.03
DST-JFRM-LC-0001-DS12X5
Ds14x25
125
0.03
DST-JFRM-LC-0001-DS14X25
Ds14x30
125
0.03
DST-JFRM-LC-0001-DS14X30
Ds14x40.6
125
0.03
DST-JFRM-LC-0001-DS14X40.6

drylin® trapezoidal lead screw nut


Thread
single start
Max.
static 
F axial 
[N]
Max. id
ling torque
(with O-ring) from 
[Nm]


Part number
Tr8x1.5
75
0.01-0.03
JFRM-LC-0001-TR8X1.5
Tr10x2
75
0.01-0.03
JFRM-LC-0001-TR10X2
Tr10x3
75
0.01-0.03
JFRM-LC-0001-TR10X3
Tr12x3
125
0.06
JFRM-LC-0001-TR12X3
Tr14x3
125
0.08
JFRM-LC-0001-TR14X3
Tr14x4
125
0.08
JFRM-LC-0001-TR14X4
Thread
multi start
 
 
 
Tr06x2P1
40
0.01-0.03
JFRM-LC-0001-TR06X2P1
Tr12x6P3
125
0.06
JFRM-LC-0001-TR12X6P3

Anti-backlash lead screw nut
Anti-backlash lead screw nut
Technical data
Yellow = Axial clearance

Information

Noise and vibrations can generally occur with the use of lead screw drives. In particular, long lead screws and long travels can cause self-induced vibrations in the systems.
 
Due to their good sliding properties, lead screw nuts made from the tribologically optimised iglidur® materials tend to develop less noise than conventional plastics or metallic materials, such as bronze or brass.
 
To reduce noise, in addition to the right choice of material, a preloading mechanism is also an effective measure. In the case of the AB lead screw nut, an elastomer ring applies a force on an insert plate with a matching thread, which is pressed into the threads of the lead screw. It is important that this preload is not present over the entire length and not all around. This ensures low axial clearance in only a small range. The functional principle of this lead screw nut differs significantly from that of the zero-backlash lead screw nut.
 
Reduction of noise and vibrations 
 
For trapezoidal threads up to thread diameter of 24mm
Cylindrical and flange lead screw nuts
Thread direction: RH and LH
Material: iglidur® J and iglidur® R
 
Technical data

Technical data

drylin® cylindrical trapezoidal lead screw nut


iglidur® J
Screw threads
Effective
support surface
[mm2]
Max. staticF axial
[N]

Part number
Tr8x1.5
228
683
JSRM-AB-2220-TR8X1.5
Tr10x2
283
848
JSRM-AB-2220-TR10X2
Tr12x3
396
1.188
JSRM-AB-2220-TR12X3
Tr16x4
704
2.111
JSRM-AB-2220-TR16X4
Tr18x4
905
2.714
JSRM-AB-2220-TR18X4
Tr20x4
1.131
3.393
JSRM-AB-2220-TR20X4
Tr24x5
1.621
4.863
JSRM-AB-2220-TR24X5
 

Also available for left-hand thread.





iglidur® R
Thread
iglidur® R
Effective
support surface
[mm2]
Max. staticF axial
[N]

Part number
Tr10x2
283
424
RSRM-AB-2220-TR10X2
Tr12x3
396
594
RSRM-AB-2220-TR12X3
Tr16x4
704
1.056
RSRM-AB-2220-TR16X4
Tr18x4
905
1.357
RSRM-AB-2220-TR18X4
Tr20x4
1.131
1.696
RSRM-AB-2220-TR20X4
Tr24x5
1.621
2.432
RSRM-AB-2220-TR24X5

drylin® trapezoidal lead screw nut with flange


iglidur® J
Thread
iglidur® J
Effective
support surface
[mm2]
Max. staticF axial
[N]

Part number
Tr10x2
353
1.060
JFRM-AB-2220-TR10X2
Tr10x3
334
1.001
JFRM-AB-2220-TR10X3
Tr12x3
396
1.188
JFRM-AB-2220-TR12X3
Tr14x4
471
1.414
JFRM-AB-2220-TR14X4
Tr16x2
613
1.838
JFRM-AB-2220-TR16X2
Tr16x4
704
2.111
JFRM-AB-2220-TR16X4
Tr18x4
905
2.714
JFRM-AB-2220-TR18X4
Tr20x4
1.131
3.393
JFRM-AB-2220-TR20X4
Tr24x5
1.621
4.863
JFRM-AB-2220-TR24X5
Also available for left-hand thread.


iglidur® R
Thread
iglidur® R
Effective
support surface
[mm2]
Max. staticF axial
[N]

Part number
Tr10x2
353
530
RFRM-AB-2220-TR10X2
Tr10x3
334
501
RFRM-AB-2220-TR10X3
Tr12x3
396
594
RFRM-AB-2220-TR12X3
Tr14x4
471
707
RFRM-AB-2220-TR14X4
Tr16x2
613
919
RFRM-AB-2220-TR16X2
Tr16x4
704
1.056
RFRM-AB-2220-TR16X4
Tr18x4
905
1.357
RFRM-AB-2220-TR18X4
Tr20x4
1.131
1.696
RFRM-AB-2220-TR20X4
Tr24x5
1.621
2.432
RFRM-AB-2220-TR24X5

Pre-load lead screw nuts
Pre-load lead screw nuts
Pre-load lead screw nuts
Technical data

Information

The new pre-load lead screw nut convinces with minimal axial clearance and highest positioning accuracy. It is the cost-effective alternative to the zero backlash and ideally suited for small pitches. This is the proven pre-load principle from SHT-PL. Typical applications include 3D printers.

For high helix threads up to a thread diameter of 6.35mm
Cylindrical lead screw nut with flange
Thread direction: right-hand thread
Material: iglidur® J 
 
To the online shop

Technical data


Thread
Max. static F axial
[N]
Max. idling torque
(with spring) 
from [Nm]

Part number
Ds6.35x2.54
30
0.10
DST-JFRM-PL-0001-DS6.35X2.54
Ds6.35x5.08
30
0.10
DDST-JFRM-PL-0001-DS6.35X5.08
Ds6.35x6.35
30
0.10
DST-JFRM-PL-0001-DS6.35X6.35

To the dryspin lead screw technology overview page

Find everything you need here

Discover our dryspin lead screw technology, reduce time spent on design, and optimise your procurement process.
 
► Online shop
► Configurators
► Information
► Application examples
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Consulting

I look forward to answering your questions

Photo
Thorben Hendricks

Leiter Geschäftsbereich
dryspin® Gewindetriebe

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Saturdays from 8 am- 12 pm.

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The terms "igus", "Apiro", "chainflex", "CFRIP", "conprotect", "CTD", "drylin", "dry-tech", "dryspin", "easy chain", "e-chain", "e-chain systems", "e-ketten", "e-kettensysteme", "e-skin", "e-spool", "flizz", "ibow", "igear", "iglidur", "igubal", "igutex", "kineKIT", "manus", "motion plastics", "pikchain", "readychain", "readycable", "ReBeL", "speedigus", "triflex", "robolink", "xirodur", and "xiros" are legally protected trademarks of the igus® GmbH/ Cologne in the Federal Republic of Germany and where applicable in some foreign countries.

igus® GmbH points out that it does not sell any products of the companies Allen Bradley, B&R, Baumüller, Beckhoff, Lahr, Control Techniques, Danaher Motion, ELAU, FAGOR, FANUC, Festo, Heidenhain, Jetter, Lenze, LinMot, LTi DRiVES, Mitsubishi, NUM,Parker, Bosch Rexroth, SEW, Siemens, Stöber and all other drive manufacturers mention on this website. The products offered by igus® are those of igus® GmbH