120x150x7 Oil Seal: Size & Selection Checklist

What does 120x150x7 mean?

The nominal dimensions are 120 mm inside diameter, 150 mm outside diameter and 7 mm width. Dimensions alone do not establish the lip profile, compound grade, pressure capability or equipment compatibility. Confirm tolerances and the installation drawing before ordering.

Item	Information to confirm
Nominal dimensions	120 x 150 x 7 mm
Seal profile	Approved cross-section and lip orientation
Material	Compound grade and hardness on the quotation
Operating pressure	Continuous and peak differential pressure
Shaft speed	Continuous speed, start-stop cycle and direction
Temperature and fluid	Actual lubricant or fluid and operating range

Is this size suitable for high pressure?

This page does not establish a pressure rating for a specific VKEFOT part. Do not select a seal for a pressurized installation from its dimensions or FKM material name alone. Provide the pressure differential, shaft speed, fluid and temperature so the proposed design can be reviewed. Any pressure rating must come from the approved product specification and its stated operating conditions.

Material selection

Ask for compatibility with the actual fluid and operating temperature, including startup and cleaning conditions. NBR, FKM and other compounds are not interchangeable solely because the dimensions match. Confirm the specific compound, hardness and intended duty in writing. See the sealing materials guide for the information needed for a quotation.

Before installation

1. Check the delivered part number and dimensions against the approved drawing.
2. Inspect the shaft and housing for damage, contamination and features that could damage the lip.
3. Follow the selected seal manufacturer's instructions for orientation, lubrication, installation tools and seating depth. Different designs can require different procedures.
4. Verify the installation and observe the assembly under the agreed commissioning procedure.

If a new seal leaks

Record the part number, batch, operating time before leakage, fluid, temperature, pressure and shaft speed. Provide photos of the installed orientation, shaft surface and removed part where available. Do not assume that a different rubber material or another seal with the same nominal dimensions will resolve the cause.

Information for a quotation

Send the drawing or full dimensions, current part reference, operating conditions, quantity and destination. MOQ, sample availability and delivery are confirmed for the actual item in the written quotation; see our trade policy.

Frequently asked questions

Can I order by size alone?

Size is the starting point. Confirm the profile, compound and operating conditions before approving a replacement.

Does FKM automatically make this a high-pressure seal?

No pressure rating is established by the material name alone. Request a design-specific rating and the conditions under which it applies.

Is this page a product test report?

No. This is a selection checklist, not a validated performance specification or equipment approval.

Reference and scope

SKF's seal engineering guidance identifies operating conditions, including pressure differential, as inputs to seal selection. This general reference does not certify VKEFOT products or transfer an SKF product rating to them.

Editorial update: 18 September 2026. Product-specific pressure, speed and temperature limits require an approved specification. Request a drawing review.

Related catalog and engineering resources

Compare the seal catalog against the complete drawing and operating conditions. Material names alone do not establish a pressure rating. Consult the rotary shaft seal technical manual for general selection guidance and the replacement checklist before requesting a part-specific drawing review.