{"id":279,"date":"2010-02-06T23:51:39","date_gmt":"2010-02-06T21:51:39","guid":{"rendered":"http:\/\/www.swisswuff.ch\/tech\/?p=279"},"modified":"2010-02-08T00:27:07","modified_gmt":"2010-02-07T22:27:07","slug":"dorrance-555-aluminum-hook-with-nitrile-covers","status":"publish","type":"post","link":"https:\/\/www.swisswuff.ch\/tech\/?p=279","title":{"rendered":"Dorrance 555 aluminum hook with nitrile covers"},"content":{"rendered":"

I also use a Dorrance 555 aluminum hook with nitrile covers. It is light, and it is extremely powerful and sturdy. Compared to the Otto Bock Movohook<\/a> and right after wearing a few days, I would rate it as more precise, more sturdy, lighter and more versatile.<\/p>\n

The rubbers were a feature that some may look at as outdated – but I would not go that far. After wearing the Otto Bock Movohook 2Grip for over a year now and after working with it a lot, I have to say that it is heavy (the Dorrance 555 is light), even freshly after a service\/overhaul the Otto Bock hook’s tips are not precise and neither is the Otto Bock hook joint (the Dorrance hook has a ball bearing and is rather precise), the Otto Bock hook has two spring settings (but I often only use one spring tension setting and that is the strong action one; if I need two spring settings these are ‘strong’ and ‘ridiculously strong’), the Otto Bock spring has a slightly stronger initial resistance to pull (whereas the haptics of rubber tension is – hard to describe – pleasant to my shoulder). And the Otto Bock spring accidentally falls off, as they don’t seem to fix the spring too well.<\/p>\n

First I cut myself an adapter piece (instead of buying yet another Otto Bock bolt) and placed a washer under the ball of my cable so it would fit and stay in place.<\/p>\n

Then I increased the hook’s strength by buying some castration bands [see Open Prosthetics on that issue<\/a>] and now adding one. I don’t have this tool they use to put on rubber bands, so I just rolled it over the claws and pulled it into position. No problem.<\/p>\n

Very nice. I do like the vertical claw position, also I find it better for typing.<\/p>\n

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Some more about highway robbery on a great Open Prosthetics blog page<\/a>: I use castration rubber bands instead of the official rubbers that sell 40 pieces for 37 US$ or so at amputeesupply.com. Alternatively they sell castration bands for 17$ a pack (without shipping) at amputeesupply.com<\/a>.<\/p>\n

Now, I got 100 pieces for 15 CHF – one for 15 cents (that includes <\/em>shipping and handling; price without shipping is ~ 2.70 CHF). That’s a fair price for standard rubber rings that I can live with.<\/p>\n

Get your supplies at proper stores. Not at amputeesupply.com<\/a>.<\/p>\n

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Tweet<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"

I also use a Dorrance 555 aluminum hook with nitrile covers. It is light, and it is extremely powerful and sturdy. Compared to the Otto Bock Movohook and right after wearing a few days, I would rate it as more precise, more sturdy, lighter and more versatile. The rubbers were a feature that some may…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83,3,8],"tags":[],"class_list":["post-279","post","type-post","status-publish","format-standard","hentry","category-hosmer-dorrance","category-hook","category-prosthetics","wpcat-83-id","wpcat-3-id","wpcat-8-id"],"publishpress_future_action":{"enabled":false,"date":"2026-04-26 19:04:10","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=\/wp\/v2\/posts\/279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=279"}],"version-history":[{"count":0,"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=\/wp\/v2\/posts\/279\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swisswuff.ch\/tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}