drylin® R - Technical information

Includes test methods and design tips

This page will hopefully help with vital information and data that you need for specifying the right parts for your application.

It also includes design tips for when using drylin R linear bearings.

Why use drylin R bearings?Information on split linear bearings Design tips for drylin R buildTo the configurators Shop our linear systems Need support? Contact us

Material data table

General properties	Unit	iglidur J	iglidur X	iglidur J200	Testing method
Density	g/cm³	1.49	1.44	1.72
Colour		yellow	black	dark grey
Max. moisture absorption at +23°C/50% room humidity	% weight	0.3	0.1	0.2	DIN 53495
Max. moisture absorption	% weight	1.3	0.5	0.7
Coefficient of sliding friction, dynamic against steel	µ	0.06-0.18	0.09-0.27	0,11 - 0,22
pxv value, max. (dry)	MPa x m/s	0.34	1.32	0.33

Mechanical properties
Flexural modulus	MPa	2,400	8,100	2,800	DIN 53457
Flexural strength at 20°C	MPa	73	170	58	DIN 53452
Compressive strength	MPa	60	100	43
Maximum recommended surface pressure (20°C)	MPa	35	150	23
Shore D hardness		74	85	70	DIN 53505

Physical and thermal properties
Max. long-term application temperature	°C	+90	+250	+90
Max. short-term application temperature	°C	+120	+315	+120
min. application temperature	°C	-50	-100	-50
Thermal conductivity	[W/m x K]	0.25	0.6	0.24	ASTM C 177
Coefficient of thermal expansion (at 23°C)	[K-1 x 10-5]	10	5	8	DIN 53752

Electrical properties
Specific transitional resistance	Ωcm	> 1013	< 105	> 108	DIN IEC 93
Surface resistance	Ω	> 1012	< 103	> 108	DIN 53482

General properties	Unit	iglidur E7	iglidur A180	Testing method
Density	g/cm³	1.05	1.46
Colour		dark grey	white
Max. moisture absorption at +23°C/50% room humidity	% weight	0.1	0.2	DIN 53495
Max. moisture absorption	% weight	0.1	1.3
Coefficient of sliding friction, dynamic against steel	µ		0.05-0.23
pxv value, max. (dry)	MPa x m/s		0.31

Mechanical properties
Flexural modulus	MPa	1,477	2,300	DIN 53457
Flexural strength at 20°C	MPa	22	88	DIN 53452
Compressive strength	MPa		78
Maximum recommended surface pressure (20°C)	MPa	18	28
Shore D hardness		61	76	DIN 53505

Physical and thermal properties
Max. long-term application temperature	°C	+70	+90
Max. short-term application temperature	°C	+90	+110
min. application temperature	°C	-50	-50
Thermal conductivity	[W/m x K]		0.25	ASTM C 177
Coefficient of thermal expansion (at 23°C)	[K-1 x 10-5]		11	DIN 53752

Electrical properties
Specific transitional resistance	Ωcm		< 1012	DIN IEC 93
Surface resistance	Ω	> 109	< 1011	DIN 53482

drylin® R - Comparison of the permissible dynamic load with the same diameter

Why use drylin R bearings?

The cylindrical standard bearings consist of a replaceable iglidur® J sliding film, which is clipped positively into an anodised aluminium adapter. The axial retention of the sliding film is realised via an annular groove.

The drylin® linear plain bearings are also available in solid plastic with the same dimensions. They are made entirely of the wear-resistant material iglidur® J and can offer technical advantages in addition to the significant price advantage. For example, applications in which machine parts are mainly made of stainless steel, such as food and filling technology, are predestined for the use of solid plastic bearings. A further weight saving is also easy to realise.

Both versions are designed for mounting in housing bore with tolerance H7. As with ball bushings, they are fastened using circlip according to DIN 471/472.

The narrow type of the cylindrical linear plain bearing, type 02, is pressed or glued into the H7 housing bore. Commercially available 2-component adhesives can be used for this purpose.

Dirt, dust, fibres

An important difference between all the linear bearings on offer is their compatibility with dirt. For most systems, the use of wipers or seals is recommended even with low levels of dust.

No other system offers such a high level of protection against dust, fluff and coarse dirt as drylin®. The absence of lubricants and the special design of the bearing surfaces with individual raceways and the interruptions between them have a particularly favourable effect in the event of contamination. Dirt, even if it is wet on the shaft, is wiped off the individual raceways and pushed back into the non-contact tracks. The crossbar of the running surfaces of the drylin®-bearing then glide on the track that has been wiped free of all dirt.

Split linear bearings

Applications at the limits of what is technically feasible or in extremely abrasive environments are characterised by the regular replacement of the bearing. In many cases, drylin® has been able to multiply the operating time. Nevertheless, it may be necessary to replace the bearing from time to time in such applications. drylin® linear plain bearings can contribute to considerable cost reductions in these cases, as only the bearing film needs to be replaced. This often saves costs of more than 90 %. There is also no need to remove the shafts.

The separable bearings are simply pulled out of the housing and opened. The sliding film is slotted and can be easily fitted to the shaft. Put the bearing halves back together, install - done. Assembly times can be reduced to a minimum with this programme of separable drylin® bearings.

To the drylin® R overview

drylin® R - Design information

Test method and design tip for drylin R

The stated values for "Fmax." refer to the performance of the iglidur® plain bearing foils made of high-performance plastics and cannot be used as the sole criterion for the calculation of an application. The max. The maximum load capacity of the overall bearing system depends on the installation position, housing shape, housing material, connection including the screws used and requires a separate check. For the complete design of your application, please use our online design software "drylin® Expert system".

igus® test method for determining the tolerance of drylin® linear plain bearings

In order to guarantee the function of a drylin® R linear plain bearing, it is necessary to use the bearing with a defined minimum interference (bearing clearance). The quality control of this part is carried out with a plug gauge test. For this purpose, a certain force is defined with which the plug gauge is loaded when the plain bearing is tested.

Order number	Test force [N]	Øi test housing	min. bearing Øi (plug gauge free)	Max. bearing Øi (plug gauge hangs)
JUM-01/02-10	0.981	12,000 mm	10,030 mm	10,070 mm
JUM-01/02-12	1.373	14,000 mm	12,030 mm	12.070 mm
JUM-01/02-16	1.864	18,000 mm	16,030 mm	16,070 mm
JUM-01/02-20	2.649	23,000 mm	20,030 mm	20,070 mm
JUM-01/02-25	3.729	28,000 mm	25,030 mm	25,070 mm
JUM-01/02-30	4.807	34,000 mm	30,040 mm	30.09 mm
JUM-01/02-40	7.063	44,000 mm	40,040 mm	40.09 mm
JUM-01/02-50	9.810	55,000 mm	50,050 mm	50,100 mm
JUI-01-06	0.981	0.4684 inch	0.3768 inch	0.3776 inch
JUI-01-08	1.373	0.5934 inch	0.5016 inch	0.5024 inch
JUI-01-10	1.864	0.7184 inch	0.6268 inch	0.6276 inch
JUI-01-12	2.649	0.8747 inch	0.7516 inch	0.7524 inch
JUI-01-16	3.729	1.1247 inch	1.0016 inch	1.0024 inch
JUI-01-20	4.807	1.4058 inch	1.2520 inch	1.2531 inch
JUI-01-24	7.063	1.6558 inch	1.5020 inch	1.5031 inch
JUI-01-32	9.810	2.1870 inch	2.0024 inch	2.0039 inch
RJM-01-08	0.981	16,000 mm	8.025 mm	8.061 mm
RJM-01-10	0.981	19,000 mm	10.025 mm	10.061 mm
RJM-01-12	1.373	22,000 mm	12.032 mm	12.075 mm
RJM-01-16	1.864	26,000 mm	16.032 mm	16.075 mm
RJM-01-20	2.649	32,000 mm	20,040 mm	20.092 mm
RJM-01-25	3.729	40,000 mm	25,040 mm	25.092 mm
RJM-01-30	4.807	47,000 mm	30,040 mm	30.092 mm
RJM-01-40	7.063	62,000 mm	40,050 mm	40.112 mm
RJI-01-06	0.981	0.6250 inch	0.3762 inch	0.3776 inch
RJI-01-08	1.373	0.8750 inch	0.5013 inch	0.5030 inch
RJI-01-10	1.864	1.1250 inch	0.6265 inch	0.6282 inch
RJI-01-12	2.649	1,2500 inch	0.7516 inch	0.7536 inch
RJI-01-16	3.729	1.5625 inch	1.0035 inch	1.0056 inch
RJI-01-20	4.807	2.0000 inch	1.2520 inch	1.2544 inch
RJI-01-24	7.063	2.3750 inch	1.5020 inch	1.5044 inch
RJI-01-32	9.810	3.0000 inch	2.0024 inch	2.0053 inch
RJ260(U)M-02-12	1.373	19,000 mm	12.032 mm	12.084 mm
RJ260(U)M-02-16	1.864	24,000 mm	16.032 mm	16.084 mm
RJ260(U)M-02-20	2.649	28,000 mm	20,040 mm	20,100 mm
RJ260(U)M-02-25	3.729	35,000 mm	25,040 mm	25,100 mm
XUMO-01-10	0.981	12,000 mm	9.98 mm	10.02 mm
XUMO-01-12	1.373	14,000 mm	12.02 mm	12.06 mm
XUMO-01-16	1.864	18,000 mm	16.02 mm	16.06 mm
XUMO-01-20	2.649	23,000 mm	20.03 mm	20.07 mm
XUMO-01-25	3.729	28,000 mm	24.97 mm	25.01 mm
XUMO-01-30	4.807	34,000 mm	29.96 mm	30.01 mm
XUMO-01-40	7.063	44,000 mm	40.00 mm	40.05 mm

Explanation:

The material iglidur® X has a higher stiffness than iglidur® J. As a result, the ratio of test force to LD diameter shifts - depending on the diameter - in comparison. The parts are designed so that the clearance under load between iglidur® X and iglidur® J bearings is as identical as possible. This can lead to increased displacement forces in the unloaded new condition on an h-tolerated shaft when using the iglidur® X plain bearing foils.

When using a plain bearing (e.g. JUM/RJM) in conjunction with an adapter/housing (e.g. RJUM, OJUM, RGA), the manufacturing tolerance of the housing bore (usually: H7) is added to the minimum clearance listed above. The sum of these two values then gives the maximum possible bearing tolerance. Plain bearings of the dimensional series "Japan-Std." (JUJ) are tested according to the same criteria as the JUM plain bearing.

The effective bearing clearance is also influenced by the shaft tolerance. The undersize of the shaft must be added if necessary.

Fmax. dynamic:
The maximum values result from the projected bearing area and 5 MPa surface pressure.

Fmax. static:
The maximum values result from the projected bearing area and 35 MPa surface pressure.

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