igus® test method and design tips

Design information for DryLin® R linear bearings

The mentioned values for "Fmax." refer to the performance of iglidur® liners made of high-performance plastics and cannot be used as the sole criterion for the calculation of an application. The max. load capacity of the overall bearing system depends on the mounting position, housing shape, the housing material, the connection including the used screws and requires a separate verification. For 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 bearings with a defined minimum excess (bearing clearance). The quality control of this item is done with a gage inspection. A certain force is defined to load the gage when the bearing is checked.

Order no.	Test force [N]	Øi - Test- mount	Min. bearing Øi (gage free)	Max. bearing Ø (gage hanging)
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

Describtion:
iglidur® X material has higher stiffness than iglidur® J. Depending on the diameter, this shifts the ratio of test force to LD diameter in comparison. The parts are designed in such a way that the clearance between iglidur® X and iglidur® J plain bearings is as identical as possible under load. By using the iglidur® X bearing liner, this can result in increased displacement forces on a shaft with h-tolerance in the unloaded new state.
 
When using a bearing (e.g. JUM/RJM) in combination with an adapter/housing (e.g. RJUM, OJUM, RGA), the manufacturing tolerance of the housing bore adds up to the above-listed minimum clearance (Normal case: H7). The sum of the these two values then shows the maximum possible bearing tolerance. Bearing of the dimensional series "Japan-Std." (JUJ) is checked according to the same criteria of the JUM bearing.
 
The effective bearing clearance is also impacted by the shaft tolerance. Any shaft undersize may have to be added.
 
F_max dynamic:
The limit values are derived from the projected bearing surface and 5 MPa surface pressure.
 
F_max static:
The limit values are derived from the projected bearing surface and 35 MPa surface pressure.