65x78x10 mm Rotary Shaft Oil Seal NBR, Black Seal with Metal Casing

Product Overview

A 65 x 78 x 10 mm oil seal is a radial lip seal for a shaft passing through a housing. On vehicle and machinery units it stops oil weeping past the shaft, and it also keeps road spray, mud and wash water from entering the bearing cavity.

At a glance:

65x78x10 mm | NBR (nitrile butadiene rubber) | single lip, garter spring, metal casing | made in Xingtai, Hebei, China | working range -30 C to +100 C (short peaks to +120 C)

The body is a metal casing with the rubber moulded onto it, and the lip is held by a garter spring. The 10 mm width gives a longer seating band than a slim seal, which suits housings that see side loads and vibration.

Key Features & Benefits

• Seals oil under load: A spring loaded NBR lip maintains contact on the shaft, so lubricant does not escape past a shaft that flexes under load.
• Blocks water and mud: The closed lip line and firm bore seat keep wheel spray and wash water away from the bearing.
• Ten millimetre seating band: The wider casing spreads the press fit over more of the bore, which helps on housings exposed to vibration.
• Case holds the geometry: A metal casing keeps the outer diameter round and square, so the lip does not distort when the seal is driven in.
• Made for fleet planning: A fixed round size is easy to stock in quantity for scheduled servicing across a mixed fleet.
• Straightforward replacement: Clean the bore, lubricate the lip, press in square; no heating and no special fitting aids are needed.

Dimensions & Specification

Specification	Value
Inner Diameter (ID)	65 mm
Outer Diameter (OD)	78 mm
Width / Height	10 mm
Material	NBR (nitrile butadiene rubber)
Colour	Black
Structure	Single lip, garter spring, metal casing 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

Nominal dimensions, given as inner diameter x outer diameter x width. Verify against the removed seal or the measured shaft and housing bore before an order is placed.

Material & Construction

The lip is NBR (nitrile butadiene rubber), the usual compound for mineral oil, grease and general vehicle service. It holds its properties from -30 C to +100 C, with brief peaks to +120 C, and stays flexible enough to seal a shaft with light scoring. Rubber is bonded onto a steel casing, and the lip is kept in contact by a garter spring. If the unit runs hotter, or the lubricant is synthetic, the same 65 x 78 x 10 seal can be quoted in FKM, which is suitable for continuous duty at about +200 C.

Quality Control and Inspection

• Incoming: compound hardness checked before release to production.
• In process: casing concentricity, lip geometry, spring seating and outer diameter roundness checked at set intervals.
• Final: dimensional check on inner diameter, outer diameter and width, hardness, lip edge and marking inspection, 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 arrange a third party inspection before shipment; state it in the enquiry so it can be built into 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.

Lead time for standard sizes is typically 7 to 15 working days after order confirmation, and longer for sizes that are not held as standard stock. 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: 65 x 78 x 10 mm, or the size marked on the seal being replaced.
2. Quantity and destination: annual or first order volume, destination country and port.
3. Material: NBR as standard, FKM or HNBR where conditions demand them.
4. Marking and packaging: printing on the seal and carton details.
5. Sample or drawing: send one where the seal is matched from a worn part.
6. Working conditions: temperature, oil type and shaft speed, where known.

Frequently Asked Questions

How do I confirm this seal fits my assembly?
Measure the shaft, the housing bore and the depth for the seal. Readings of 65 mm, 78 mm and 10 mm identify this size; then confirm the compound suits the oil and temperature in service.

What are the exact dimensions of this oil seal?
65 mm inner diameter, 78 mm outer diameter and 10 mm overall width. These are nominal figures, so compare them with your own sample or drawing before releasing an order.

What is the minimum order quantity?
MOQ depends on stock status and on the annual quantity you plan to run. State the volume you need and the quotation will confirm the MOQ together with tiered pricing.

What is the lead time, and can you ship by sea or air?
Standard sizes typically ship within 7 to 15 working days after order confirmation. Both sea and air shipments are arranged, with freight and transit time confirmed per destination.

Can you supply FKM or HNBR instead of NBR?
Yes. The same geometry can be run in FKM for continuous heat near +200 C and synthetic fluids, or in HNBR for better abrasion and ozone resistance. Confirm at the enquiry stage.

Do you provide samples, and are they free?
Evaluation samples can be arranged. The sample and its freight are quoted per request, and on a confirmed bulk order the sample charge is normally credited 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 part being replaced, quantity, material, working temperature and fluid, packing and marking needs, and the destination port.

Request a Quotation

Send the 65 x 78 x 10 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.