HK0808 Needle roller bearings 08×12×08mm

Needle roller bearings, drawn cupHK0808

Demension: 08×12×08mm ,    Weight: 3 g.

SHAPE LOCATION TOLERANCE SHOULD BE TO CURRENT STANDARD;

Outer ring fordrawncup needle roller bearings(DC type) is made of cold rolled steel strip accurately formed.Structure of DC needle roller bearings features space saving and higher capacity.They are suitable for applications with limited space and housing not hard enough to act as raceway. No requirement on axial location when the DC needle roller bearing is pressed into the housing.

In most applications inner ring is not necessary for DC needle roller bearings unless shaft raceway is impractical,standard inner rings for DC to compare with open end DC needle roller bearings, close end DC needle roller bearings are good for sealing at the close end of bearings,operating temperature range for bearings grease lubricatedare 20℃ to +120℃.



Needle roller bearings, drawn cupHK0808

1. Structures of various series of drawn cupneedlerollers
     Metricseries: HK, BK, F, FH, FY, MF, MFH,MFY
     Inch series: SCE, BCE, SCH, BCH,SN, B, BH, M, MH
     HK: Caged, with open ends
     BK: Caged, with open ends
     F : Full complement, with open ends
     FH : Full complement,withopenends(Heavy series)
     FY : Full complement, grease retained,withopenends
     MF : Full complement, with closed ends
     MFH:Fullcomplement, with closed ends(heavy series)
     MFY: Fullcomplement,withclosed ends
     SCE: Caged, with open ends
     BCE:Caged, withclosedends
     SCH: Caged, with open ends(heavy series)
     BCH: Caged,withclosed ends(heavy series)
     SN   : Full complement, greaseretained,withopen ends
     B    : Full complement, with open ends
     BH   :Fullcomplement, with open ends(heavy series)
     M    : Fullcomplement,withclosed ends
     M H: Full complement, with closedends(heavyseries)
2. Inspection the enveloping circle diameter
    The dimensional accuracy of drawn cup needle roller bearings cannot be measured before fitting
    without a ring gauge as the thin-walled outer ring can be out of round due to the manufacturing process.
    The bearings obtain the accuracy required for their correct function only when pressed into ahousing
     bore which must be manufactured with the recommended tolerance limits.
     The enveloping circle diameter can then be checked as follows:
a.   Press the bearing into a steel ring gauge(wall thickness≥20mm).The bore dimension of the ring
        gauge must correspond to that given.
b.   Measure the enveloping circle diameter with cylindrical go and no-go gauge plugs.

	GB	JIS	B.S	ASTM	DIN
BR03602BR03604	HPb63-3	C3602      C3604	CZ121   CZ124	C36000	CuZn36Pb3	,C3602[Brass(Bronze)]
BR03771	HPb59-1	C3771	CZ122	C37700	CuZn39Pb2
BR01100	T1              T2	C1100	C101     C102	C11000	E-Cu58            E-Cu57	,(Rose copper)
BR02600 BR02700	H70        H65	C2600       C2700	CZ106     CZ107	C26000    C27000	CuZn30    CuZn36	[Brass(Bronze)]
BR46400	HSn62-1   HSn60-1	C4622     C4641	CZ112        CZ113	C46400     C48600	CuZn39Sn    CuZn38Sn	,(Admiralty brass)
BRCZ132	CZ132	[Brass(Bronze)]
BR17200	QBe2QBe1.7	C1720     C1700	CB101	C17200   C17200	CuBe2    CuBe1.7	,,(Copper-beryllium)
BR05441 BR05152	QSn4-4-4QSn7-0.2	C5441   C5212	PB103    PB104	C54400   C52100	CuSn4-Zn4Pb4 Cu-Sn8	,,,            (phosphorouscopper)
BR14500	C14500	(Tecub copper)
BR06161	QA17	C6161	CA103C   A104	C61000	CUAL8Fe	(Bronze)
BR75200	BZn15-20	C7521	NS105	C75200	CuNi44Mn	()                    (Zinc copper)
BR83600	ZQSnD5-5-5	BC1n6	LG2	C83600	GB-CuSn5ZnPb	,,      [Brass(Bronze)]

Needle roller bearings, drawn cupHK0808