8mm DIN766 MF DAMS Grade 70 Hot Dip Galvanised Calibrated Anchor Chain

Jimmy Green Marine 8mm DIN766 MF DAMS Grade 70 is sourced exclusively and directly from MF Catenificio Frigerio, a modern chain manufacturing plant in Italy.

MF Catenificio manufacturing is all carried out in their research, test, and ISO9001-attested production facility.
The whole state-of-the-art enterprise is located in Olginate, near Lecco, Lake Como, Italy.

MF Catenificio Frigerio Hallmark Stamping Assurance

Each batch of chain is subjected to a series of strict load traction, breaking and bending resistance examinationss which test the physical and mechanical characteristics under conditions of maximum stress, ensuring that every weld is 100% guaranteed.

DAMS stands for Downsizing Anchoring and Mooring System

MF 8mm DIN766 Grade 70 Calibrated Anchor Chain features EN ISO 461 Regulated Hot Dip Galvanising to a micron depth of  80 ± 10 µ. delivering excellent protection against corrosion.

Hot-dip galvanising anchor chain is a challenging process which involves immersing the chain in a molten zinc bath.

The molten zinc chemically reacts with the surface of the steel to create an iron-zinc alloy.

The result is a deep protective treatment to a minimum depth of 80 microns regulated to the EN ISO 461 standard.

MF Galvanising provides longlasting resistance to abrasion and corrosion.

MF Catenificio hot dip galvanising performance is further guaranteed by stringent application of their state of the art Salt-Spray testing treatment. 

MF Catenificio Salt Spray Galvanisation Test

The MF Salt Spray Test, developed by the MF Laboratiory Team and introduced in 2023 scrutinises the effectiveness and durability of the galvanising treatment.

The MF testing laboratory conducts a stringent examination of each batch of chain, exposing it to a concentrated salt solution for 24/48 hour cycles.

Salt Spray Testing simulates the real environmental conditions to which the chain will be exposed during its service life.

The results are governed by the MF Catenificio Frigerio UNI EN ISO 9001 certified quality system.

MF DAMS Grade 70 8mm DIN766 has a break load similar to 10mm Grade 40 chain.
An 8mm Grade 70 anchor rode can therefore be approximately 50% longer than the 10mm Grade 40 equivalent without any increase in weight.
MF DAMS 8mm DIN766 is a long-length, high-performance extended-cruising solution for yachts up to 12 metres in length overall.
N.B. As a comparison, a 10mm Grade 40 chain is generally suitable for yachts up to 16 metres in length overall.
It is advisable to consider all the relevant information when determining whether 8mm Grade 70 will be suitable for yachts between 12 metres and 16 metres.

Factor in:

• Displacement: Length ratio
• Your cruising intentions
• The anticipated anchorage conditions, e.g. depth, seabed holding characteristics, the length of fetch and degree of exposure to prevailing winds
• The length of the chain that will be deployed and any extra scope provided by an anchor warp
• The weight and design of the anchor

Your anchor rode is only as strong as the weakest link, so make sure that all your connectors and shackles are rated to the necessary break load.
The strength of 8mm Grade 70 means it is best considered an all-chain solution rather than a chain/rope combination.
14mm is the most compatible diameter rope to splice into an 8mm DIN766 chain.
16mm diameter rope can be spliced into an 8mm DIN766 chain but is a tight squeeze.
A minimum 18mm diameter nylon rope would be required for the chain and rope combination to be reasonably compatible in terms of strength.

Jimmy Green Advisory on Checking your Required Chain Calibration:

There is one main calibration for 8mm chain - DIN766

N.B. Some Windlass and Chain manufacturers also refer to 8mm ISO 4565, but the dimensions are exactly the same as DIN766.
However, it is still very important to check the size and calibration of your gypsy/chain before you order.
If you are unsure, we can help you to decide - we will take all reasonable steps to ensure that you order the correct chain.
The simplest way to check that you are buying the correct calibration is to measure your existing chain, providing that it fits correctly.

We measure ten links because, in practice, it is difficult to measure one link accurately enough.
The links should be laid out flat and pulled tight.
Measure from the outside edge to the outside edge.

How to determine the correct calibration
N.B. The measurement for an old chain may be a little longer than new due to a degree of wear and elongation in use.

Outside Width - depends on the degree of weld protrusion

Every link is tested to the proof load during the manufacturing process, ensuring that each weld has been completed successfully

1Kn Force = 101.972Kg Break Load

70Kn = approximately 7138kg

Maximum Pin Diameter refers to the largest pin which will fit comfortably in the end link of an 8mm DIN766 chain.

Select the largest possible galvanised shackle (or anchor connector) by pin diameter to fit the chain.

A copy of the appropriate Test Certificate for your batch will be available with your order on request

Jimmy Green Anchor Chain Quality Control and Accountability
Every length of chain is checked and labelled with the manufacturer, the date received, and a corresponding batch number when it arrives.
The batch number is then recorded at the point of sale.
Every chain order is, therefore, traceable and accountable to the Manufacturer Test Certificate.