Which teflon to stiffen focuser

[bigal1]

Hi all , i have a 130p and the rack and pinion focuser has lots of slop which is causing collimation issues so i decided to check on the net for solutions and found a few ideas which involve using teflon to line the inside of the focuser tube housing to take up the slack . I've found plenty of teflon sheets for sale on ebay but am still unsure which would be the best to use as there are lots of different types so wondered what other people have used to sort this kind of problem ? thanks .

Regards Alan

[Alien 13]

Strips cut from a coke/larger/fanta tin worked for me with this type of issue and it can have folded tabs to secure it in place.

Alan

[xtreemchaos]

Allen thats a cool idea mate,id never of thought of a coke can,and there easy to cut with sissors.  thanks for sharing.  charl.

[bigal1]

Nice idea i'll give it a try and it should also help me to figure out the thickness i need .

[Alien 13]

It worked fine on the st102 I had it is also soft so fills in any imperfections and very cheap.

Alan

[NEM]

Plastic strips cut from milk bottles and held in place with double sided tape has worked well for me.

[Physopto]

If it is a very thin piece of Teflon it will split very easily. Teflon has no strength at all compared to polythene type materials. Teflon has to be reinforced by other means i.e. include fibres in its makeup. I would stick with polythene type material  cut from a bottle  as suggested above, or the metal can.

Derek

[bigal1]

Sound advice thanks all , just waiting for some lithium grease to arrive then i'll have a try

[keithatrochdale]

You can get self-adhesive rolls of Teflon in various thickness's, maybe get a thin one and use a few layers until you are happy with the clearance.

.

[booth_robert]

dont use the teflon that has the fibres as it snags and tares