Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Modelling tools => Topic started by: portside II on March 27, 2022, 09:20:25 pm

Title: allen key drivers smller than 1.5mm
Post by: portside II on March 27, 2022, 09:20:25 pm

Hi i recently bought a static dive sub which has the magnetic quick release connectors on the control lines.The only trouble is the grub screws are smaller than my smallest driver (1.5mm) , and after one connector came off and the grub screw disapered somewhere on my workshop floor i drilled nd tapped it for a 1.5mm grub.But the rest of the screws are still there holding, and i would like to be able to service them.
So my question is where do i find a decent 1mm allen screw driver ?daz

Title: Re: allen key drivers smller than 1.5mm
Post by: Ralph on March 27, 2022, 09:36:31 pm

I had a similar problem years ago.  I took a cheap 1.5mm allen key (the metal wasn't very hard as it was real cheapy) and filed each face to give a tapered end to it.  Not very accurate but the taper gave it enough of a grip to work.


Ralph

Title: Re: allen key drivers smller than 1.5mm
Post by: Fastelectrics on March 27, 2022, 11:05:44 pm

You can get these sets from Ebay. I cannot vouch for the quality however.


https://www.ebay.co.uk/itm/393110668284?hash=item5b8738c3fc:g:JUgAAOSw3YpgEMph (https://www.ebay.co.uk/itm/393110668284?hash=item5b8738c3fc:g:JUgAAOSw3YpgEMphhttp://)

Title: Re: allen key drivers smller than 1.5mm
Post by: nemesis on March 28, 2022, 07:11:40 pm

Try Chronos or Tracy Tools or Blackgates or Reeves, nemesis

Title: Re: allen key drivers smller than 1.5mm
Post by: Nordlys on March 28, 2022, 07:28:58 pm

In my experience when you get down to small sizes such as this they generally have slotted grub screws?
 N

Title: Re: allen key drivers smller than 1.5mm
Post by: derekwarner on March 29, 2022, 01:49:10 am

Daz.....the real issue here is understanding what is what........


The sample hollow pointed grub screw may measure 1.5mm diameter however the ISO Standard 4026 tables as below confirms the actual thread size for this item as M1.6x 0.35P with an in hex of 0.7240 AF


Manufacturing tolerances at these relatively small sizes makes measurement difficult to understand especially the in-hex size


It appears metric grub screws are manufactured & available as M1.0, M1.2, M1.4, M1.6, M1.7 & M2.0 ...and also in slotted head  O0 ....again, M1.5 diameter grub screws are not listed


I have used a dozen or so M2 x 0.4 HPGS.......the manufacturing tolerance allows for a minimum thread size of 1.87mm diameter and the in-hex is listed as 0.9020, however my M1 driver fits the HPGS just fine so you can see where the measurements confuse the matter  %)


Derek

Title: Re: allen key drivers smller than 1.5mm
Post by: Peter57 on May 13, 2022, 04:54:35 pm

Hi,


I recently bought some small Allen keys (0.7 to 1.27mm) from Ebay. They are branded Arndt. I have only used the 1.27 and 1.19mm keys so far, but they seem fine.


Regards
Peter