55x76x9 mm Rotary Shaft Oil Seal NBR, Black Single Lip Seal with Spring

Product Overview

This 55 x 76 x 9 mm seal closes the gap between a rotating shaft and its housing. Lubricant is held inside, road grit, wash water and mud are kept outside, and the bearing behind the seal is protected from both directions.

At a glance:

55x76x9 mm | NBR (nitrile butadiene rubber) | single lip, garter spring, metal case | made in Xingtai, Hebei, China | working range -30 C to +100 C (short peaks to +120 C)

It is produced in black NBR with a spring loaded single lip and a steel case. Because the size is defined by three measurements, a buyer can match an existing seal from a shaft and bore reading rather than from a parts list.

Key Features & Benefits

• Holds oil and grease in: The loaded NBR lip runs on the shaft and keeps lubricant inside the housing under normal rotary speeds.
• Keeps water and mud out: A closed lip line and a snug case to bore fit stop wash water and fine grit from reaching the bearing.
• Case stays put in the bore: A stiff case gives the seal a firm seat, so it does not creep under vibration or shaft run out.
• Spring keeps the load even: Shaft wear and lip bedding in are taken up by the garter spring instead of by the fitting tolerance alone.
• Nine millimetre section: The case depth covers housings that need a little more clamping length than a slim 8 mm seal.
• Predictable service work: Square press fit and a lubricated lip are the whole procedure, which keeps jobs repeatable in a busy workshop.

Dimensions & Specification

Specification	Value
Inner Diameter (ID)	55 mm
Outer Diameter (OD)	76 mm
Width / Height	9 mm
Material	NBR (nitrile butadiene rubber)
Colour	Black
Structure	Single lip, garter spring, metal case with moulded outer diameter
Seal Type	Rotary shaft oil seal
Marking	VKEFOT
Continuous Service Temperature	-30 C to +100 C (short peaks to +120 C)
Brand	VKEFOT
Origin	Xingtai, Hebei, China

Values shown are nominal: inner diameter x outer diameter x width. Confirm them against the removed part or against a measured shaft and housing bore before releasing an order.

Material & Construction

NBR (nitrile butadiene rubber) forms the sealing lip and the outer moulding; a steel case gives the body its shape. NBR is the workhorse compound for mineral oil and grease, running from -30 C to +100 C with short peaks to +120 C, and it tolerates the small shaft misalignment found in repaired units. A garter spring keeps the lip in contact as it wears. For synthetic oils, aggressive additives or continuous heat above that range, the same 55 x 76 x 9 seal can be supplied in FKM, which is rated to about +200 C in continuous service.

Quality Control and Inspection

• Incoming: compound hardness checked before release to production.
• In process: case concentricity, lip profile and moulding, spring seating and bore roundness checked at set intervals.
• Final: measurement of inner diameter, outer diameter and width, hardness, lip edge and outer surface inspection, marking check, then packing count verification.
• Traceability: inspection results for each batch are recorded and kept; the inspection scope can be agreed before order confirmation.

Buyers may appoint a third party inspector before shipment; mention it in the enquiry so the cost and timing are included in the quotation.

Customization and OEM Service

packaging and logo available upon request

Packaging, Carton and Delivery

Standard packing is individual polybag, inner carton, then export carton. Carton marks, labels and barcodes are printed to buyer specification.

In stock: ships in 1 to 2 days. Not in stock but still in current production: 10 to 15 days. Not in stock and not in production: 25 to 30 days. Minimum order quantity depends on whether the size is a stocked standard or made to order. Pricing, MOQ, freight and trade terms are confirmed in the written quotation. Send an RFQ with quantity and destination port.

How to Order

The more of this you include, the faster and more accurate the quotation:

1. Size: 55 x 76 x 9 mm, or the readings from your shaft and bore.
2. Quantity and destination: number of pieces, destination country and port.
3. Material: NBR as standard, or FKM for synthetic fluid or higher heat.
4. Marking and packaging: print and carton requirements.
5. Sample or drawing: send one where the seal is matched from a worn part.
6. Working conditions: fluid, temperature and shaft speed, if available.

Frequently Asked Questions

How do I confirm this seal fits my assembly?
Read the shaft diameter, the housing bore and the available depth. A 55 mm shaft in a 76 mm bore with 9 mm of room is the fit; then check the lip compound against the oil in use.

What are the exact dimensions of this oil seal?
55 mm inside, 76 mm outside and 9 mm wide. Treat them as nominal figures and verify against your sample or drawing, because housing depth and shoulder position differ between units.

What is the minimum order quantity?
The MOQ follows whether this size is stocked or has to be run for you. State the quantity you plan to buy and the quotation confirms the MOQ together with tiered pricing.

What is the lead time, and can you ship by sea or air?
In stock: ships in 1 to 2 days. Not in stock but still in current production: 10 to 15 days. Not in stock and not in production: 25 to 30 days. Sea and air shipments are both organised, and freight plus transit time are confirmed for your destination.

Can you supply FKM or HNBR instead of NBR?
Yes. FKM covers continuous duty to roughly +200 C and better resistance to synthetic fluids; HNBR suits ozone and abrasion exposure. Confirm the compound when you enquire.

Do you provide samples, and are they free?
Evaluation samples can be arranged. Sample and freight charges are quoted per request, and on confirmed bulk orders the sample cost is usually set off against the order value.

Can you produce our packaging and logo?
packaging and logo available upon request.

What information do you need to quote?
Size or a photo of the seal being replaced, quantity, material, temperature and fluid, packing and marking needs, and the destination port.

Request a Quotation

Send the 55 x 76 x 9 size, quantity, destination and any marking requirement, and we reply with MOQ, lead time, packing details and price.

VKEFOT Seals: oil seals, O-rings and custom rubber parts. Xingtai, Hebei, China.