Oil Seal 120×140×7.5 mm – SICOMA MAO 3000/2000 – 0228G0001B2
Function of Oil Seal 0228G0001B2:
The oil Seal 0228G0001B2 is a compact rotary shaft oil seal is designed for tight housing bores in the SICOMA MAO twin-shaft mixer shaft sealing group, where axial space is limited. It closes the dynamic gap between the 120 mm shaft sleeve and the 140 mm bearing housing, keeping bearing grease inside and blocking the ingress of fine cement and dust. Because of its slim 7.5 mm profile, this seal is typically used as an intermediate element in multi-seal stacks on SICOMA MAO 3000/2000 concrete mixers.
Technical Snapshot – 120×140×7.5 mm NBR Oil Seal
- Part code: 0228G0001B2
- Application: SICOMA MAO 3000/2000 twin-shaft mixer shaft sealing group
- Nominal dimensions: 120×140×7.5 mm
- Inner Diameter (ID): 120 mm
- Outer Diameter (OD): 140 mm
- Thickness: 7.5 mm
- Material: NBR (Nitrile Rubber) – suitable for common bearing greases and standard mineral oils used in concrete mixer bearing housings.
- Outer surface design: Rubber-covered OD to reduce corrosion and improve static sealing inside the bore.
Abbreviations & Terms
- NBR: Nitrile Rubber
- ID / OD: Inner Diameter / Outer Diameter
Why Replacement Matters for 0228G0001B2?
When the seal lip wears out, it stops pressing against the shaft sleeve. This leads to several problems:
- The grease barrier breaks down.
- Abrasive slurry along with cement dust begins to move into the bearing area.
- Lubricant leaks out, and contamination speeds up the wear of the bearing and damage to the shaft.
In practice, a failed 0228G0001B2 usually means shortened bearing life, overheating, and unplanned mixer downtime if it is not detected early.
What to Check Before Ordering This Oil Seal?
- This 120×140×7.5 mm NBR oil seal (0228G0001B2) is part of the SICOMA MAO 3000/2000 shaft sealing group and it is used on specific SICOMA MAO mixer revisions with a 120 mm shaft diameter and 140 mm housing bore.
- It is not interchangeable with PA084, which has the same shaft diameter (120 mm) but a 160 mm OD.
- Before ordering confirming the housing bore diameter with calipers (140 mm vs 160 mm) matters.
Installation Notes – Oil Seal 0228G0001B2?
- The seal has to sit square and flush inside the housing bore with no gaps.
- The bore must be smooth, clean, and free of burrs to prevent cutting the outer rubber layer.
- Apply grease to both the shaft surface and the seal lip before start-up to avoid dry running and immediate lip damage.
For critical applications, installation should be carried out by a qualified maintenance technician.
Delivery Time:
- If the product is not in stock, it is delivered to order, usually within 4-6 weeks after making an advance payment.
- Some items may be in transit, so checking the delivery time before ordering is recommended.
Commercial Note:
All quotations and proforma invoices for this item are issued in EURO (EUR). Please request a formal offer for current pricing.