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Male-Female Bobbin Mount 30x25mm M8 70 Shore - 3025MF20-70
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Technical Specification
PRODUCT NUMBER 4020MM23-454020MM25-452520FF06-703015MM20-604015MM25-45
Type Bobbin MountBobbin MountBobbin MountBobbin MountBobbin Mount
Length 20mm20mm20mm
Height 15mm15mm
Size 40x20mm40x20mm25x20mm30x15mm
Deflection 1.61.61.61.11.6
Diameter 40mm40mm25mm
Diameter Range 26-50mm26-50mm11-25mm
Length Range 11-25mm11-25mm11-25mm
Mount Dimension 30mm40mm
Shore Hardness 454570
Thread M8M10M6M8M10
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Q 1. What is the maximum load rating and deflection for the 3025MF20-70?

A. This mount has a maximum load rating of 41.0 kg and a deflection of 2.1 mm. The low deflection is a direct consequence of the 70 Shore A hardness grade, which is the firmest in the 30 x 25 mm male-female bobbin range.

Q 2. What thread sizes does the 3025MF20-70 use?

A. The mount uses an M8 x 20 mm male stud (d1 x L) and an M8 female thread (d2), making it suitable for standard M8 hardware on both fixing faces.

Q 3. What are the overall dimensions of this bobbin mount?

A. The outer diameter is 30 mm and the height is 25 mm (D x H: 30 x 25 mm).

Q 4. What applications is the 70 Shore A grade best suited to?

A. At 70 Shore A this is the firmest grade in the 30 x 25 mm range, designed for installations that must limit movement under load. Suitable applications include diesel engine ancillaries, generator set sub-frames, industrial machinery subject to cyclic shock, and exhaust mounting points where a firm, low-deflection element is required.

Q 5. In which loading directions can this mount be used?

A. The mount may be loaded in shear, compression, or a combination of both, giving flexibility in how it is oriented within an assembly.

Q 6. How does the 70 Shore A grade compare to the other grades available in the 30 x 25 mm bobbin family?

A. The 3025MF20-45 (45 Shore A) offers greater deflection and better vibration isolation at lower loads; the 3025MF20-60 (60 Shore A) is a general-purpose mid-grade. The 3025MF20-70 (70 Shore A) carries the highest load with the least deflection and is the correct choice where the component must be held firmly under heavier or shock loading conditions.

Q 7. Are custom materials available for this bobbin mount?

A. Yes. Stainless steel metal components and oil-resistant or high-temperature rubber compounds, as well as additional and custom sizes, are available on request.

Q 8. What payment methods do you accept?

A. We accept all major credit and debit cards, along with PayPal.

Q 9. How long does delivery take?

A. Standard UK mainland delivery is 3–5 working days. Next-day delivery is available on most products and will appear as an option at checkout where eligible.

Q 10. How long does delivery take?

A. Standard UK mainland delivery is 3–5 working days. Next-day delivery is available on most products and will appear as an option at checkout where eligible.

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