One of the main activities of the company I work for is marine repairs. Some of these works are being executed on board, but we also have a workshop ashore. Here we do standard repairs, like reconditioning of connecting rods, valves, pistons, cylinder heads, fuel injection equipment etc.
Every now and then though, we do some special repairs. Like the two anchors we received in our workshop yesterday. The bore of the hole, through which the anchor is connected with a shackle to the anchor chain, had worn out over time.
To repair this, we first machine the hole to an oversize, in order to allow a bush with the correct nominal diameter to be shrunk in. The bush is machined separately.
After heating the upper part with a propane or butane flame, the bush can slide in and is being held solidly in place after cooling down.
Both the oversize hole and the bush insert, have a bevel machined to it. To finish the repair, the groove between bush and body of the anchor top is filled up by a circular weld.
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Good Morning
I am facinf a similar problem on 2 pcs of 15T anchors. Which company can do these repairs.
Contact Goltens Shanghai. Best is to send an email with details to repair.shanghai@goltens.com
Best regards!
Can you have any standards stating how much clearances is allowed?
Regards
For moving parts like the anchor shackle pin or the moving shaft of the flukes and crown, the head pin and the
head pin retaining bolts and various swivels, the general acceptable increase in clearance is 10% of original
pin/shaft diameter.
Kenter shackle parts are to fit tightly together without any movement. Loose parts indicate that the shackle is
worn out or rusted, and that it is to be renewed.
The diameter of the hole for the anchor shackle pin in the anchor is not to be worn more than 10% above the
original hole diameter.
Check for excessive wear in the head of the swivel.