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Track rollers with cylindrical or crowned outer ring - type LR
• Series LR rollers are also called CAM ROLLERS, can be used in the heavy loads track or used as an idler wheel. They are widely used in the particular application that the friction should be reduced.
• The outer diameter surface of rollers is shaped to the crowned runner surface with R500 (suffix U ), so make the stresses well when rollers working.
• Rollers take the internal structure design of deep groove ball bearings or double row angular contact ball bearings and have a particularly thick-walled outer ring, so the rollers can accommodate higher loads.
• Rollers are made of the high-quality bearing steel, processed by heat treatment and precision grind, and are filled with a long service life, high -grade and multi-purposes grease. Rollers take the metal shield (suffix KDD ) or rubble seal (suffix NPP ) to prevent the dust. NSKF also can provide the rollers with concentric or eccentric pivot. Some types of the rollers can be made from the corrosion resistance stainless steel.
■ Characteristics of the guide system that series LR rollers are applied :
1. Low resistance, long service life, widely-use
Being cam rollers with crowned runner surface R500, make its stresses in well-distributed between rollers and track when working, thus the stresses centralization are avoided, the friction resistance are reduced and the service life of rollers have been improved a lot. Most of the double row cam rollers can be relubricated through the filling hole on the inner ring to adapt the adverse working conditions.
2. Easy installation
After rollers assembled the concentric or eccentric pivot, installation can be made convenient. To adjust the eccentric one's eccentricity, the rollers can get the fitting preload.
3. Smooth running, minimum error
Besides we produce the series LR cam rollers according to the standard of rolling bearings, we also make the strict control on the rotary accuracy of outer ring in order to meet special working mode that inner

Traxk Roller No.			Mass	Dimensions (mm)						Load Ratings		Fatigue Limit Load	Speed
NSKF	GERMAN	EURO	≈ (g)	D	d	B	C	R	Rs	Cw(N)	Cow(N)	Puw(N)	n D seals	n D shields
LR 5005 NPP	LR5005NPP		150	52	25	16	16	-	0.6	11600	8100	332	4700	7000
LR 5005 NPPU	LR5005NPPU		150	52	25	16	16	500	0.6	11600	8100	332	4700	7000
LR 5005 KDD	LR5005KDD		150	52	25	16	16	-	0.6	11600	8100	332	4700	7000
LR 5005 KDDU	LR5005KDDU		150	52	25	16	16	500	0.6	11600	8100	332	4700	7000
LR 5006 NPP	LR5006NPP		250	62	30	19	19	-	1	17200	11100	462	4000	6000
LR 5006 NPPU	LR5006NPPU		250	62	30	19	19	500	1	17200	11100	462	4000	6000
LR 5006 KDD	LR5006KDD		250	62	30	19	19	-	1	17200	11100	462	4000	6000
LR 5006 KDDU	LR5006KDDU		250	62	30	19	19	500	1	17200	11100	462	4000	6000
LR 5007 NPP	LR5007NPP		300	68	35	20	20	-	1	17600	13100	490	4000	5300
LR 5007 NPPU	LR5007NPPU		300	68	35	20	20	500	1	17600	13100	490	4000	5300
LR 5007 KDD	LR5007KDD		300	68	35	20	20	-	1	17600	13100	490	4000	5300
LR 5007 KDDU	LR5007KDDU		300	68	35	20	20	500	1	17600	13100	490	4000	5300
LR 5200 NPP	LR5200NPP		70	32	10	14	14	-	0.6	6800	4050	168	8000	11000
LR 5200 NPPU	LR5200NPPU		70	32	10	14	14	500	0.6	6800	4050	168	8000	11000
LR 5200 KDD	LR5200KDD	305700 C-2Z	70	32	10	14	14	-	0.6	6800	4050	168	8000	11000
LR 5200 KDDU	LR5200KDDU	305800 C-2Z	70	32	10	14	14	500	0.6	6800	4050	168	8000	11000
LR 5201 NPP	LR5201NPP		80	35	12	15.9	15.9	-	0.6	8600	5100	211	7500	10000
LR 5201 NPPU	LR5201NPPU		80	35	12	15.9	15.9	500	0.6	8600	5100	211	7500	10000
LR 5201 KDD	LR5201KDD	305702 C-2Z	80	35	12	15.9	15.9	-	0.6	8600	5100	211	7500	10000
LR 5201 KDDU	LR5201KDDU	305801 C-2Z	80	35	12	15.9	15.9	500	0.6	8600	5100	211	7500	10000
LR 5202 NPP	LR5202NPP		110	40	15	15.9	15.9	-	0.6	9800	6200	258	7000	10000
LR 5202 NPPU	LR5202NPPU		110	40	15	15.9	15.9	500	0.6	9800	6200	258	7000	10000
LR 5202 KDD	LR5202KDD	305702 C-2Z	110	40	15	15.9	15.9	-	0.6	9800	6200	258	7000	10000
LR 5202 KDDU	LR5202KDDU	305802 C-2Z	110	40	15	15.9	15.9	500	0.6	9800	6200	258	7000	10000
LR 5203 NPP	LR5203NPP		170	47	17	17.5	17.5	-	0.6	12600	8200	342	5500	7500
LR 5203 NPPU	LR5203NPPU		170	47	17	17.5	17.5	500	0.6	12600	8200	342	5500	7500
LR 5203 KDD	LR5203KDD	305703 C-2Z	170	47	17	17.5	17.5	-	0.6	12600	8200	342	5500	7500
LR 5203 KDDU	LR5203KDDU	305803 C-2Z	170	47	17	17.5	17.5	500	0.6	12600	8200	342	5500	7500
LR 5204 NPP	LR5204NPP		230	52	20	20.6	20.6	-	1	15800	10500	433	5000	7000
LR 5204 NPPU	LR5204NPPU		230	52	20	20.6	20.6	500	1	15800	10500	433	5000	7000
LR 5204 KDD	LR5204KDD	305704 C-2Z	230	52	20	20.6	20.6	-	1	15800	10500	433	5000	7000
LR 5204 KDDU	LR5204KDDU	305804 C-2Z	230	52	20	20.6	20.6	500	1	15800	10500	433	5000	7000
LR 5205 NPP	LR5205NPP		340	62	25	20.6	20.6	-	1	18500	13000	532	4500	6500
LR 5205 NPPU	LR5205NPPU		340	62	25	20.6	20.6	500	1	18500	13000	532	4500	6500
LR 5205 KDD	LR5205KDD	305705 C-2Z	340	62	25	20.6	20.6	-	1	18500	13000	532	4500	6500
LR 5205 KDDU	LR5205KDDU	305805 C-2Z	340	62	25	20.6	20.6	500	1	18500	13000	532	4500	6500
LR 5206 NPP	LR5206NPP		510	72	30	23.8	23.8	-	1	24600	21400	880	3500	5000
LR 5206 NPPU	LR5206NPPU		510	72	30	23.8	23.8	500	1	24600	21400	880	3500	5000
LR 5206 KDD	LR5206KDD	305706 C-2Z	510	72	30	23.8	23.8	-	1	24600	21400	880	3500	5000
LR 5206 KDDU	LR5206KDDU	305806 C-2Z	510	72	30	23.8	23.8	500	1	24600	21400	880	3500	5000
LR 5207 NPP	LR5207NPP		660	80	35	27	27	-	1.1	30500	22400	927	2800	3900
LR 5207 NPPU	LR5207NPPU		660	80	35	27	27	500	1.1	30500	22400	927	2800	3900
LR 5207 KDD	LR5207KDD	305707 C-2Z	660	80	35	27	27	-	1.1	30500	22400	927	2800	3900
LR 5207 KDDU	LR5207KDDU	305807 C-2Z	660	80	35	27	27	500	1.1	30500	22400	927	2800	3900
LR 5208 NPP	LR5208NPP		750	85	40	30.2	30.2	-	1.1	34500	25500	1060	2500	3500
LR 5208 NPPU	LR5208NPPU		750	85	40	30.2	30.2	500	1.1	34500	25500	1060	2500	3500
LR 5208 KDD	LR5208KDD	305708 C-2Z	750	85	40	30.2	30.2	-	1.1	34500	25500	1060	2500	3500
LR 5208 KDDU	LR5208KDDU	305808 C-2Z	750	85	40	30.2	30.2	500	1.1	34500	25500	1060	2500	3500
LR 5302 NPP	LR5302NPP		150	47	15	19	19	-	1	14600	9200	380	6500	10000
LR 5302 NPPU	LR5302NPPU		150	47	15	19	19	500	1	14600	9200	380	6500	10000
LR 5302 KDD	LR5302KDD	306702 C-2Z	150	47	15	19	19	-	1	14600	9200	380	6500	10000
LR 5302 KDDU	LR5302KDDU	306802 C-2Z	150	47	15	19	19	500	1	14600	9200	380	6500	10000
LR 5303 NPP	LR5303NPP		210	52	17	22.2	22.2	-	1	17200	11100	462	4700	6500
LR 5303 NPPU	LR5303NPPU		210	52	17	22.2	22.2	500	1	17200	11100	462	4700	6500
LR 5303 KDD	LR5303KDD	306703 C-2Z	210	52	17	22.2	22.2	-	1	17200	11100	462	4700	6500
LR 5303 KDDU	LR5303KDDU	306803 C-2Z	210	52	17	22.2	22.2	500	1	17200	11100	462	4700	6500
LR 5304 NPP	LR5304NPP		340	62	20	22.2	22.2	-	1.1	21100	14500	606	4500	6500
LR 5304 NPPU	LR5304NPPU		340	62	20	22.2	22.2	500	1.1	21100	14500	606	4500	6500
LR 5304 KDD	LR5304KDD	306704 C-2Z	340	62	20	22.2	22.2	-	1.1	21100	14500	606	4500	6500
LR 5304 KDDU	LR5304KDDU	306804 C-2Z	340	62	20	22.2	22.2	500	1.1	21100	14500	606	4500	6500
LR 5305 NPP	LR5305NPP		500	72	25	25.4	25.4	-	1.1	27500	19500	813	3900	5500
LR 5305 NPPU	LR5305NPPU		500	72	25	25.4	25.4	500	1.1	27500	19500	813	3900	5500
LR 5305 KDD	LR5305KDD	306705 C-2Z	500	72	25	25.4	25.4	-	1.1	27500	19500	813	3900	5500
LR 5305 KDDU	LR5305KDDU	306805 C-2Z	500	72	25	25.4	25.4	500	1.1	27500	19500	813	3900	5500
LR 5306 NPP	LR5306NPP		670	80	30	30.2	30.2	-	1.1	36500	26500	1100	3100	4300
LR 5306 NPPU	LR5306NPPU		670	80	30	30.2	30.2	500	1.1	36500	26500	1100	3100	4300
LR 5306 KDD	LR5306KDD	306706 C-2Z	670	80	30	30.2	30.2	-	1.1	36500	26500	1100	3100	4300
LR 5306 KDDU	LR5306KDDU	306806 C-2Z	670	80	30	30.2	30.2	500	1.1	36500	26500	1100	3100	4300
LR 5307 NPP	LR5307NPP		970	90	35	34.9	34.9	-	1.5	44500	33000	1370	2500	3600
LR 5307 NPPU	LR5307NPPU		970	90	35	34.9	34.9	500	1.5	44500	33000	1370	2500	3600
LR 5307 KDD	LR5307KDD	306707 C-2Z	970	90	35	34.9	34.9	-	1.5	44500	33000	1370	2500	3600
LR 5307 KDDU	LR5307KDDU	306807 C-2Z	970	90	35	34.9	34.9	500	1.5	44500	33000	1370	2500	3600
LR 5308 NPP	LR5308NPP		1200	100	40	36.5	36.5	-	1.5	56000	42000	1750	2300	3300
LR 5308 NPPU	LR5308NPPU		1200	100	40	36.5	36.5	500	1.5	56000	42000	1750	2300	3300
LR 5308 KDD	LR5308KDD	306708 C-2Z	1200	100	40	36.5	36.5	-	1.5	56000	42000	1750	2300	3300
LR 5308 KDDU	LR5308KDDU	306808 C-2Z	1200	100	40	36.5	36.5	500	1.5	56000	42000	1750	2300	3300

Note: *Series LR52... and LR53... can be re-lubricated through a hole in the inner ring.
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