Attributes

Brand	-
Category	Electronic Components Market / Other Components
Origin	-
Material	High-Grade Carbon Steel
Model Number	BMB34030
Wall Type	Thin-Wall Design
Application	Mechanical Excavator Shafts
Inner Diameter	30 mm
Outer Diameter	40 mm
Length	Customizable Sizes Available
Surface Finish	Precision Machined
Hardness	HRC 45-50
Compatibility	Universal Fit for Various Liners

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Solid industrial grade

Very durable steel. The surface finish is smooth which reduces friction effectively. Delivery took a day longer than estimated, but the product quality makes up for it.

Anonymous

Mar 28, 2026

Rating: 5/5

Best replacement part

Replaced worn-out copper sleeves with these steel ones. The performance improvement in our excavators is noticeable. Highly recommend for heavy machinery maintenance.

Anonymous

Mar 25, 2026

Rating: 5/5

Excellent precision

As a procurement manager, I appreciate the consistency in sizing. These sleeves fit perfectly into our liner shaft assemblies. Will definitely reorder.

Anonymous

Mar 22, 2026

Rating: 4/5

Good quality, fast shipping

The thin-wall design works well for our specific application. Shipping was faster than expected. Only giving 4 stars because the packaging could be slightly more robust for heavy industrial parts.

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect fit for our excavator repair

Ordered these sleeves for a fleet maintenance job. The dimensions were exact, and the steel quality is top-notch. Installation was smooth without any need for additional machining.

Anonymous

Mar 05, 2026

Rating: 5/5

Reliable component

We have used multiple sizes from this supplier. The BMB3*40*30 model holds up well under high stress. Great value for the price compared to OEM parts.

5 FAQ

Q: Is the material resistant to corrosion in outdoor environments?

A: The carbon steel has a protective finish, but for harsh outdoor or marine environments, we recommend applying an additional anti-corrosion coating during installation.

Q: Do you offer a warranty on these components?

A: Yes, all our mechanical sleeves come with a 12-month warranty against manufacturing defects under normal operating conditions.

Q: Are these sleeves compatible with older excavator models?

A: Yes, the BMB3*40*30 size is designed to be universal, but we recommend checking your specific shaft dimensions against our size chart before ordering.

Q: Can these be welded directly onto the shaft?

A: These are press-fit sleeves designed for mechanical assembly. While they are made of weldable steel, we advise consulting your engineering team for specific welding procedures to avoid warping.

Q: What is the lead time for bulk orders of 500 units?

A: For bulk orders over 100 units, our standard lead time is 7-10 business days. Custom sizes may require an additional 3-5 days.

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