Torque Screwdriver Questions

Sondekker · Post by **Sondekker** » 2011-02-02 21:56

As a relatively new member to this forum, I have already had some really helpful assistance from Fredrik and others regarding a minor hum problem with my LP12.

In browsing through the various sections of the forum I have become very interested in all of the discussion surrounding precision torqueing of various fasteners on the LP12 and also on speaker drive units.

I have today just had delivered a SR screwdriver from the States and am itching to give it a go. However, I have already realised a few problems.

A number of the fasteners need to be adjusted via hex or allen keys i.e. cartridge bolts, main circus bearing etc.

My screwdriver has only normal cross-hair or flat blade screwdriver attachments and I am not aware as to how I might fit an allen key or hex key into the scredriver such that these fastenings can be adjusted.

Can anyone explain to me whether the screwdriver can be used to adjust this type of fastener?

I would also welcome any other simple 'idiots guide' type of advice to using a torque screwdriver on my turntable, speakers etc.

Thanks

ThomasOK · Post by **ThomasOK** » 2011-02-04 00:40

Hello Sondekker, and welcome to the forum. The SR torque driver takes standard screwdriver tips so you can put in whatever type of tip you need. I use what are generally called "power driver" tips in the US which are 50mm long so they fit in the screwdriver without an adapter. You may have to look around a bit but you should be able to find them at quality hardware stores or online. I do have a good US source if you can't find anything there.

I have found that you can get pretty much any tip you need if you look hard enough. For the LP12 you will need a number of hex sizes, a couple of PosiDriv and some Torx. You will also want an adapter that lets you use 1/4 inch sockets. I find the following the most commonly used sizes #1, 3 and 4 Hex, #1 and 2 PosiDriv, #10 Security Torx (with the hole in the middle) and a small flat blade for wire connections on Lingo and Valhalla boards (I have a Wera 800/4). Wera makes a wide range of these tips. For the socket you need a deep 8mm.

There is a fair bit about suggested torque ranges up here but let me know if you have any more questions.

Sondekker · Post by **Sondekker** » 2011-02-05 22:36

Thomas,

Thank you for taking the time to respond.

I've got so used, over the years, to always thinking about traditional 90 degree bend allen keys that I had completely forgotten about hex key options to fit this screwdriver....doh!

It is really helpful to get advice as to which sizes of the various bits I will need although as I don't use a lingo or valhalla board, having installed an Origin Live DC motor and external power supply many years ago. As such, I don't think I need any torx bits.

Thanks again, will now acquire the various bits and am looking forward to commencing another voyage of discovery with my faithful LP12.

Ciao.

ThomasOK · Post by **ThomasOK** » 2011-02-05 23:35

Actually, the Torx bit is for the ground wire connection to a Keel and it has to be a Security Torx. It is the small flat blade that is used for the wire terminals on the Valhalla and Lingo circuit boards. With a Radikal (and your Origin Live) you don't need that tip.