間違ったシールサイズを注文すると、修理が遅れ、費用がかかり、最悪の場合、マシンが数日間停止することになります。私はその間違いを犯したことがあります。あなたには犯してほしくありません。

油圧シールを正確に測定するには、 内径（ID）, 外径（OD）、 そして 断面幅適切なフィットを保証するには、これらの寸法がシリンダーの溝と一致している必要があります。

Let me walk you through how I measure seals in my daily work—and how you can avoid common errors, even without fancy equipment.

What tools do I need to measure a hydraulic seal accurately?

Without the right tools, seal measurement turns into guesswork. And guesswork leads to leaks.

In my toolbox, I always keep:

• Digital caliper (0.01 mm accuracy)
• 平面または鋼板
• Clean cloth for oil removal
• Backup: vernier caliper
• Notepad or printable measurement form

These tools help me measure every seal—whether it’s brand new or worn beyond recognition.

道具	目的
デジタルノギス	ID, OD, and width measurement
平板	Ensures seal lies flat for accuracy
布	Wipe away residue before measuring
Seal Form	Record specs for matching and quote

If you're working with standard sizes, check out our hydraulic seal kits by size to simplify reordering.

How do I measure a worn or damaged hydraulic seal?

Measuring worn seals is tricky, but not impossible. The key is cleaning and consistency.

Here’s my step-by-step:

1. Wipe the seal with alcohol and cloth
2. Lay it flat on a smooth surface
3. Measure ID, OD, and width three times from different points

If the seal has lost shape, I average the numbers. Recently I matched a distorted seal at 45x56x7 mm—perfectly aligned with our UN油圧シール line.

For damaged or incomplete samples, take a clear photo with a ruler next to it and send it to us—we’ll identify the closest match fast.

Can I measure directly from the cylinder groove?

Yes—and it’s often more accurate if the old seal is missing or destroyed.

Here’s how I do it:

• 測定 groove width to match seal width
• 測定 groove ID or OD (depending on rod or piston side)
• Optionally, check groove depth for compatibility with single/double-lip seals

Groove Feature	Measurement Tool	Seal Correspondence
幅	デジタルノギス	Seal Width
直径	ID/OD Gauges	Rod or Piston Match
深さ	Depth Micrometer	Lip Fit, Seal Retention

Need a sizing guide for grooves? Contact us by whatsapp or mail.

What if I can’t identify the seal type?

Don’t worry—it happens to most professionals at some point.

Here’s what to send us:

• Clear photos of the seal (front, side, installed)
• Machine brand and model info
• All three dimensions: ID, OD, and width
• Optional: drawing or part number

We’ve matched thousands of seals for everything from forklift cylinders in Chile to mining machinery in Kazakhstan. Often, it's just about matching profiles like 韓国語, インド、 または 国連.

If you're running a service team, ask us about our printable spec sheet for field techs.

How to choose the correct hydraulic seal size?

Use this checklist:

• Clean the seal completely before measuring
• Record all three dimensions: ID, OD, width
• When in doubt, measure the groove—not the seal
• If old seal is distorted, average the numbers
• Send a photo with a scale or ruler for verification

Once you’ve got the specs, match with our hydraulic seal product range or send it to us for confirmation.

結論

The right seal starts with the right measurement. A few millimeters can make or break your system. Use accurate tools, follow a step-by-step approach, and lean on suppliers like us when you're unsure.

Ready to get it right?

油圧シールの測定やマッチングにサポートが必要ですか?
📧 メール: [email protected]
📱 WhatsApp: +86 17622979498
当社は迅速に対応し、写真、サンプル、または図面によるマッチングをサポートします。

Related topic

UN油圧シール
How to Choose Hydraulic Seal Kits by Size
サイズ別油圧シールキット

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