801103657 GB/T9877-2008 FB 60×80×8 Lip Seal for XCMG – Rotary Shaft Oil Seal with Dust Lip

Model: 801103657

USD $20.00 / Pieces

Min. Order: 20 Pieces

Supported Trade Terms:

FOBEXW

Lead Time:: 15-20 days after deposit
Supply Ability:: 1,000 Pieces
Shipping Port:: Shanghai/Ningbo/shenzhen

Send Inquiry

Product Features & Applications

Rotary shaft lip seal (Part No. 801103657, FB type per GB/T 9877-2008, 60×80×8) for XCMG construction machinery rotating shafts. Built to the Chinese national standard GB/T 9877-2008: 60mm shaft diameter × 80mm housing bore × 8mm width, internal-bonded skeleton (metal case fully encased in rubber), main sealing lip + auxiliary dust lip (hence "FB" = 有副唇), and stainless-steel garter spring . The dust lip makes it ideal for dusty, contaminated environments such as construction sites — it blocks external dust, rainwater and debris while the main lip retains lubricant, protecting bearings and gears from premature failure . Conforms to GB/T 9877-2008 (equivalent design to ISO 6194 / GB/T 13871.1) , NBR nitrile rubber as standard (-40°C to +120°C), customizable to FKM for high-temp duty. Supplied for XCMG spare parts market, brand new, standard export packaging, global shipping.

801103657 FB 60×80×8 Lip Seal — GB/T 9877-2008 Rotary Shaft Oil Seal with Dust Lip for XCMG

The lip seal (Part No. 801103657, FB type, 60×80×8) is a rotary shaft lip-type oil seal manufactured to the Chinese national standard GB/T 9877-2008《液压传动旋转轴唇形密封圈设计规范》 . As an FB-type (有副唇) internal-bonded-skeleton rotary shaft seal, it is installed at the shaft end of rotating equipment to retain lubricant (oil or grease) on the oil side while the auxiliary dust lip blocks external contaminants on the air side — a critical barrier protecting bearings, gears and rotating assemblies from lubrication loss or particulate ingress.

Understanding the designation (per GB/T 9877-2008):

Code Element	Meaning
GB/T 9877-2008	Chinese national standard — Guide specifications for designing rotary shaft lip type seals (现行, 2009-02-01 实施)
FB	有副唇内包骨架旋转轴唇形密封圈 (internal-bonded skeleton with dust/auxiliary lip); vs B type (无副唇, without dust lip)
60	Shaft basic diameter d₁ = 60 mm
80	Seal housing basic diameter D = 80 mm
8	Seal basic width b = 8 mm

Construction (per GB/T 9877-2008 basic structure, Fig. 1 & 2):

The seal comprises 5 core components : assembly support part (internal-bonded skeleton) + skeleton (stamped steel, rubber-bonded) + garter spring (carbon spring steel wire, GB/T 4357) + main lip + auxiliary (dust) lip.

Feature	Specification
Shaft diameter d₁	60 mm
Housing bore D	80 mm
Width b	8 mm
Skeleton type	Internal-bonded (内包骨架, rubber fully covers metal case)
Main lip	Single sealing lip with garter spring
Auxiliary lip	Yes — dust lip (FB type)
Spring	Stainless / carbon steel garter spring
Standard material	NBR (Nitrile Butadiene Rubber), 70 Shore A ±5
Alt. material	FKM (Viton) for high temperature; optional ACM, VMQ, HNBR
Standards	GB/T 9877-2008 (design basis); GB/T 13871.1 (basic dimensions, equivalent ISO 6194-1)

Performance envelope (per GB/T 9877-2008 scope & industry standard for FB type) :

Sealing cavity pressure: ≤ 0.05 MPa (FB type general-purpose oil seal)
Max. circumferential speed: ≤ 15 m/s (line speed)
Operating temperature: -40°C to +120°C (NBR standard); up to +200°C (FKM)
Lubricant compatibility: Mineral oils, gear oil, transmission fluid, grease, water-glycol
Shaft surface hardness requirement: ≥ 45 HRC (recommended), Ra 0.2–0.4 μm
Housing bore finish: Ra ≤ 1.6 μm, chamfered edge (2–3 mm, 15°)

Why FB type (vs B type): Per GB/T 9877-2008, when a rotary shaft seal operates in environments with significant dust, rainwater or external contaminants, a seal with an auxiliary (dust) lip shall be used — the FB type adds exactly this dust lip on top of the standard B-type oil seal . For construction machinery (XCMG loaders, rollers, excavators) operating in dusty quarries, mines and construction sites, FB type is the recommended choice.

Application & Compatibility

This lip seal is designed for XCMG construction machinery rotating shaft applications:

Primary application: XCMG loader / roller / excavator rotating shafts — the 60mm shaft × 80mm bore × 8mm width size is a common standard dimension across construction machinery.

Typical installation points (where FB 60×80×8 seals are commonly used) :

Application Area	Typical Use
Wheel hub / axle	Hub oil seal, final drive seal, differential seal
Transmission / Gearbox	Input/output shaft seals, gear reducer seals
Engine	Crankshaft seal, camshaft seal, accessory shaft seal
Hydraulic components	Pump/motor shaft seals, swing motor seals
Agricultural & industrial machinery	Tractors (e.g., 60×80×8 used on LN1804~LN2004 tractor platforms ), generators, compressors, retarders (FB320/FB400)