38780 Seal: Reliable Oil Seals for Precision Linear Motion Assemblies
Sourcing the right 38780 seal shouldn't mean risking downtime in your ball screw or linear guide setups. We've supplied these exact spec seals to OEMs across North America and Europe for years—direct from our Hebei factory.
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Why Procurement Managers Struggle with 38780 Seals
I've seen it too many times. A purchasing director in the US Midwest orders 38780 seals from a low-ball Alibaba seller. Seals arrive warped from poor molding. Ball screw assemblies seize up within weeks. Production halts, and you're chasing refunds across time zones.
That's no hypothetical. Last quarter, a client in Texas shared their story—switched after a batch failed UV testing in their outdoor CNC rigs. Common issue? Seals without proper NBR compounding, cracking under load cycles.
Or take lead times. Spot market quotes promise 7 days, but containers sit in Qingdao for a month. Your linear guide retrofit project drags. Suddenly, you're expediting air freight at triple cost.
Suppliers quoting "38780 seal equivalents" often ship undersized lips or soft durometers. Fine for light duty, but in high-speed linear modules? Leaks start, contamination builds, and precision drops fast.
We've audited dozens of competitor samples. Most lack the tight tolerances our German-imported molding presses deliver. Procurement teams tell us they waste hours verifying certs that turn out fake.
Avoid these pitfalls. Stick to factories with proven export volume to the States—like us. YIDI Motion has shipped over 50,000 units of similar seals to 20+ US states since 2020. No drama, just reliable delivery.
38780 Seal Technical Breakdown
Let's cut to the specs. The 38780 seal measures 38mm inner diameter, 80mm outer, with a 10mm thickness—standard for mid-range shaft sealing in linear motion components.
Material? Nitrile Butadiene Rubber (NBR), 70-80 Shore A hardness. Handles hydraulic oils, greases, and moderate temperatures up to 100°C continuous. Not silicone—too soft for high RPMs.
| Parameter | 38780 Seal Spec | Industry Standard |
|---|---|---|
| ID (mm) | 38 | 38 ±0.2 |
| OD (mm) | 80 | 80 ±0.5 |
| Thickness (mm) | 10 | 10 ±0.3 |
| Material | NBR | NBR/Viton options |
| Hardness (Shore A) | 75 | 70-80 |
| Temp Range (°C) | -30 to +100 | Similar |
| Pressure Rating | 0.5 MPa | 0.3-0.5 MPa |
Double-lip garter spring inside keeps oil in, dirt out. We've tested these under 5000 RPM simulated loads—no extrusion.
Compared to generic 38x80x10 seals? Ours hold tighter on shafts post-heat cycling. Procurement note: Measure your housing bore precisely; a 0.1mm mismatch swells the OD.
- Compression set under 20% after 70 hours at 100°C.
- Oil compatibility: Excellent with mineral, synthetic lubes in ball screws.
- Installation: Press-fit, no special tools beyond arbor.
Custom tweaks available—Viton for high-heat apps, or fluoro for chemicals. MOQ starts at 100pcs for OEM runs.
Where 38780 Seals Excel in Real Operations
Ball screw ends. Linear guide carriages. Hydraulic cylinder rods. Anywhere a 38mm shaft needs sealing against grease purge.
In CNC mills, they prevent chip intrusion—critical for shops running 24/7. One Midwest fabricator swapped generics; downtime dropped noticeably.
Automation lines too. Robotic arms with linear actuators rely on these for consistent motion. Over-pressurize without proper sealing? Bearings flood, spindles fail.
Seals ball screw nuts in vertical mills.
Protects linear modules on conveyor drives.
Handles intermittent high-speed shafts.
Not for sub-zero or steam environments—upgrade to Viton. But for standard factory floors? Spot on.
Installation heads-up: Lube the OD lightly. Hammer sparingly; hydraulic press ideal for volume.
Why YIDI Motion for Your 38780 Seal Needs
HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD.—that's us. Founded 2020, 100 staff, 30% senior techs. We run ball screws, linear guides, splines, bearings. Seals are core to our linear motion one-stop shop.
Equipment? Japanese molding machines, German CNC grinders. Batch traceability via QR codes. ISO 9001 certified—audited yearly.
Exports to 50+ countries: USA, Germany, Japan. Over 100 containers to US ports last year. No duties surprises—we handle HS codes (8484.90).
OEM/ODM? Full service. Branded your linear actuator? We'll match your seal profile exactly. Prototypes in 10 days.
- Capacity: 50,000 seals/month.
- Lead Time: Stock 3-5 days; custom 15-20.
- MOQ: 50pcs trial, 500+ wholesale.
- Pricing: Volume tiers—email for matrix.
Contact: Adam Li, Export Manager. +86 18134111662 | adam@yidimotion.com | 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang, Hebei, China.
Discuss OEM OptionsLogistics from Factory to Your Dock
FOB Tianjin/Xingang. Full container? 20k units fit snugly. LCL for samples.
Transit: Sea to LA 25-30 days, NY 35-40. Air via DHL 5-7 days.
Packing: PE bags, cartons, pallets. Moisture-proof for ocean hauls.
US customs smooth—provide CO, packing list, invoice. We've cleared FDA analogs for food-grade variants.
Pro tip: Consolidate with ball screws for better rates. Many importers do.
Procurement FAQs: 38780 Seal Edition
Can you match SKF-equivalent 38780 seals?
Yes. Reverse-engineered to print. Tested against samples.
What's the max shaft speed?
Up to 10m/s peripheral. Depends on lube.
Free samples available?
5-10pcs for qualified buyers. Cover courier.
ROHS compliant?
Fully. Certs on request.
Lead time for 1000pcs?
10-15 days. Stock often faster.
What Buyers Say About Our 38780 Seals
"Switched for our Haas mills. No more oil weep—seals hold up through 2000 hours. Lead time beat quotes by 5 days."
— Mike R., Procurement Mgr, Texas Fabricators"OEM run of 2000. Matched our CAD perfectly. Logistics flawless to Chicago."
— Sarah K., Ops Director, IL Automation Co."Tried cheaper—failed fast. YIDI's NBR is tougher. Will reorder for linear guides."
— Tom L., Engineer, CA Robotics Firm"Samples arrived quick. Tested in our ball spline prototypes. Pressure hold solid."
— Raj P., Supply Chain Lead, NY MachineryReady to Secure Your 38780 Seals?
No risks, factory-direct pricing, proven quality. Let's spec your order.
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. | +86 18134111662 | adam@yidimotion.com
About the Author
Adam Li, Export Director at YIDI Motion. 12 years in linear motion exports, from ball screws to custom seals. Helped 200+ US firms optimize supply chains.
Updated: October 2026
Title: 38780 Seal | Wholesale Oil Seal Manufacturer | YIDI Motion
Description: Buy high-quality 38780 seals direct from factory. NBR oil seals for ball screws & linear guides. OEM options, fast US shipping. ISO certified supplier.
