HARDWARE

H. 1 Focuser for reflecting telescopes, 11/4" fitting.

This has a short, helically-grooved draw-tube. A spring-loaded ball-bearing presses into the groove so that the draw-tube moves in or out when it is rotated. There are clamp screws for both the draw-tube and the eyepiece. It is made of brass and can be finished in satin black or left as polished brass. We make these and they are jolly good.

£110.00

H.2 Focuser for reflecting telescopes, 2” fitting.

This is similar to the previous item, except that the draw-tube is of larger diameter and accepts 2” fitting eyepieces.

£120.00

H.5 Setting circle, R.A.

The R.A. circle is a 5" diameter, 1/16" thick aluminium disc with a scale printed in black. It has a centre hole approx. 3.7" diameter. We now only have the R.A. disc.

£4.00

H.6 Instrument knob, 2”.

This is a black plastic instrument knob with deep, semi-circular indentations around the edge so that the operator can achieve a firm grip. On the rear face there is a brass insert in the centre, with two grub screws, to accept ¼” diameter shafts.

£3.00

H.7 Microscope x-y stage.

These are really super! They have a heavy cast-iron base plate on which the two rectangular tables slide. There is a I" diameter hole through the base and both the sliding tables. The tables (6" x 4") permit movement in the X and Y axes. There are brackets at the side of each table to hold a micrometer thimble so the table's movement can be accurately measured or adjusted. Each table moves by about I" against a powerful spring. There is no free movement in the slideways.

You can use these for their original purpose, which was to measure items under a microscope, or you can adapt them to hold components on the lathe, while carrying-out light milling or drilling operations. I have used one for years, to hold worm-wheels while the lathe cuts the teeth in the rim of the wheel. Black anodised and very heavy, these magnificent precision items are brand new.

£40.00

M. 1 Block, Synthetic resin bonded paper (SRBP).

This is a very dark brown material. It can be drilled, tapped, turned and glued. It is useful for making plugs for the rear end of refractors or just for general construction work. Each block is nominally 6 ¼” X 4” X 1 ½”.

£7.00

M. 2 Tube. SRBP.

This machines and threads beautifully. It is light, tough and may be glued. Ideal for bushing, lens cells etc. The dimensions are 2” outside diameter, 1.45” bore and it is sold by the foot length.

£6.00

M. 3 Tube, brass, helically grooved.

This is intended as the draw tube for reflectors. Length 2.5”, 1.375” o.d., 1.255” i.d.

£6.00

M. 4 Brass sleeve.

This is an excellent, heavy brass tube that machines well. Finished on the outside in matt black textured paint, it is suitable for lens cells. Dimensions are: 48mm o.d., 44.5mm i.d., length 79mm.

£6.00

M. 5 Screws, black nylon, size M6.

They have a slotted, knurled head and a 1” long threaded section. These can be used in finderscope rings. They are ideal as clamp screws when it is important not to bruise the clamped surface.

£0.60