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Mine Exploration Forum

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Author Attaching a lamp bracket
Alasdair Roberts

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Joined: 06/10/2007

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Attaching a lamp bracket
Posted: 07/02/2017 20:48:37
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I've recently acquired a very good s/h petzl ecrin roc and need to fit a lamp bracket to it. What is the best way to make the holes for the screws? I've been told that drilling it would weaken the helmet so what other alternatives are there?
Cheers, Al.
IP: 94.0.253.144
christwigg

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Joined: 20/02/2008
Location: Cleveland / North Yorkshire

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Attaching a lamp bracket
Posted: 07/02/2017 20:58:21
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Hmmmm i'm sure 'they' say you shouldn't drill it, but i'm fairly sure everyone does.

My memory is that it didn't take much effort at all, I wasn't thrashing away with a hammer action bit for 15 minutes.

I await hand wringing replies......
IP: 90.221.0.168 Edited: 07/02/2017 20:58:44 by christwigg
Alasdair Roberts

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Attaching a lamp bracket
Posted: 07/02/2017 21:13:02
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Laugh Cheers Chris. And there was me with my masonry bits on standby too.
I guess the helmet would be out of warranty now anyway. I'll just drill it.
Thanks!
IP: 94.0.253.144
Tamarmole

Joined: 20/05/2009
Location: Tamar Valley

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Attaching a lamp bracket
Posted: 07/02/2017 21:39:56
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Drill the b*gger.

My last CS Protex had 17 "non factory" holes drilled in it! Mine certainly isn't the only one to be abused like that. Most cavers and mine explorers tend to modify their helmets to a greater or lesser extent; if it was a problem I am sure there would be regular reports of helmets failing.

Only thing I would say: When attaching the bracket make sure there are no pointy bits on the inside of the headshell.
IP: 86.136.235.33
Blober

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Joined: 16/12/2012
Location: Anglesey

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Attaching a lamp bracket
Posted: 07/02/2017 21:55:49
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So I shouldn't have just used nails then? Laugh

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FILTH
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royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Attaching a lamp bracket
Posted: 07/02/2017 21:58:12
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Following with a bit of disbelief.

I can think of only one recreational lamp, plus of course the miners lamps, that fit on a bracket.

Most decent lamps bolt direct, wondering what this is about, unless choosing a lamp that needs you to buy a bracket as well has some advantage I miss.


--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
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Alasdair Roberts

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Attaching a lamp bracket
Posted: 07/02/2017 22:01:27
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I have an old speleo technics fx3 Roy. I know it's not the best piece of kit but it has never let me down and still kicks out a good light for 7 or 8 hours. I've never felt the urge to replace it yet. IP: 94.0.253.144
Blober

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Attaching a lamp bracket
Posted: 07/02/2017 22:07:08
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I feel this is somewhat apt for this conversation Laugh



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Morlock

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Attaching a lamp bracket
Posted: 07/02/2017 22:12:22
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royfellows wrote:

Most decent lamps bolt direct, wondering what this is about, unless choosing a lamp that needs you to buy a bracket as well has some advantage I miss.


Lamps that can be quickly detached from a helmet do have some advantages.
IP: 86.180.202.212
Alasdair Roberts

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Attaching a lamp bracket
Posted: 07/02/2017 22:20:47
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Tamarmole wrote:



Only thing I would say: When attaching the bracket make sure there are no pointy bits on the inside of the headshell.


Thanks for that. I'll certainly make sure they are screwed through from the inside. Cheers.
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Morlock

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Attaching a lamp bracket
Posted: 07/02/2017 22:27:35
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Probably frowned on but I simply drill and pop rivet with suitable small washer. IP: 86.180.202.212
Roy Morton

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Joined: 09/10/2007
Location: Redruth Cornwall

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Attaching a lamp bracket
Posted: 07/02/2017 23:06:38
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Morlock wrote:

Probably frowned on but I simply drill and pop rivet with suitable small washer.


Probably kinder than a Hilti gun Laugh

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Andy Mears

Joined: 23/12/2012

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Attaching a lamp bracket
Posted: 07/02/2017 23:13:33
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Also if the helmet is being worn when you use the hilti gun, it can make the helmet difficult to remove. IP: 79.68.172.158
staffordshirechina

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Joined: 15/11/2009
Location: North Staffordshire

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Attaching a lamp bracket
Posted: 08/02/2017 07:03:44
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As I understand it, the no mods. rule is from the manufacturers. It comes about because of testing. When the helmets are tested, the holes aren't there so you shouldn't add them IF you want the helmet to be still within test conditions.
Obviously non of us care about that.
However, in the world of work, some companies will not allow even the addition of stickers to helmets as it technically invalidates the helmets approval.
IP: 86.187.174.105
towim

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Joined: 19/10/2008
Location: North Wales

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Attaching a lamp bracket
Posted: 08/02/2017 08:32:57
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staffordshirechina wrote:

However, in the world of work, some companies will not allow even the addition of stickers to helmets as it technically invalidates the helmets approval.


Unless of course you buy the companies approved sticker sets, EG Petzls Guns

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Ironing 2 miles deep into a system? you obviously dont understand.
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royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Attaching a lamp bracket
Posted: 08/02/2017 09:17:33
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Blober wrote:

I feel this is somewhat apt for this conversation Laugh



Off topic but of interest.

Years ago a builders merchants I called at were selling steel tape rules at a daft giveaway price, but with a large warning notice.
Apparently they had been made with the first foot from the end as a "measuring foot" as it was described, so the count of feet etc started again. Result was if say a room was measured from the tape end and a reading taken, it would be a foot short.

I told them that I would not take one for nothing and that they needed to be destroyed.

The bloody daftest thing I have ever seen.

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"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
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ttxela

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Joined: 04/09/2007
Location: Cambs

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Attaching a lamp bracket
Posted: 08/02/2017 10:16:36
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I can actually see how that might be quite handy Roy.

When I worked in a woodworking shop we would usually measure using a start point on the tape rather than the end if a precise measurement was needed - the hook thing on the end of tapes often gets a bit banged up and bent and also slides by 1mm or so to accommodate internal and external measurements and those slots can become worn.

Probably too much potential for confusion though overall.

Incidentally I can't believe that Blackadder quote has been up for nearly half a day without anyone weighing in with the whole 'Vikings didn't actually have horns on their helmets' thing........Big Grin
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royfellows

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Attaching a lamp bracket
Posted: 08/02/2017 10:58:35
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ttxela wrote:


'Vikings didn't actually have horns on their helmets' thing........Big Grin


and James Cagney never actually called anyone a "Dirty Rat"

Off Topic

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"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
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mikehiggins

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Joined: 11/08/2008
Location: Doncaster

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Attaching a lamp bracket
Posted: 08/02/2017 12:48:21
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And Humphrey Bogart never said "play it again Sam".
Off Topic
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pwhole

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Joined: 22/02/2011
Location: Sheffield and the Peak District

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Attaching a lamp bracket
Posted: 08/02/2017 13:32:59
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staffordshirechina wrote:

However, in the world of work, some companies will not allow even the addition of stickers to helmets as it technically invalidates the helmets approval.

Petzl do allow stickers on their Vertex Best helmets, as long as it's on the two smooth panels front and back, so I took the opportunity to fill those spaces with 3M reflective tape, matching the helmet colour so they're not too obvious in dull light. Works a treat, and I haven't been run over by any large plant machinery yet.
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