Abssac Ezine June 2009

Welcome to the June  2009  ABSSAC Ezine. As always it is kept short and informative and is a worthwhile read for anyone who is a user or buyer of linear and rotary power transmission equipment.

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On with the show..........

Technological breakthrough. Making the immiscible, miscible.

Abssac is understood to be the first in the UK to supply a single piece, rolled ball screw that has a thread form right up to the end journal and a diameter that is equal or greater than that of the screw thread diameter. In the past, this format of screw and larger journal has only been possible by using a machined or ground screw thread form or by bonding a section of screw to a separate journal which would inevitably increase the unit cost. At first glance this innovation seems simple, but when you start to consider the limitations in thread rolling processes and take into account that previously it has been impossible to roll a thread on anything other than a single diameter bar stock, for the entire length of the screw, you start to see the great technological advance. A rolled ball screw will always be more competitively priced than a ground screw equivalent and this has always caused the immiscible dilemma to the design engineer. Use a machined or ground screw to get the larger journal for greater axial thrust attachment security and available bearing choice or sacrifice the larger journal advantage for the less cost rolled screw. The new SRT ball screw series, available from Abssac, are manufactured entirely from one piece of material and for the first time make the miscible supply. By providing a high linear accuracy, the new ball screw series allows the customer to replace expensive ground ball screws with a rolled screw alternative at less cost and with operational confidence. As standard, two precision tolerances are available ; C7-20 (0.05mm/300mm, 20 microns axial play)  or  C10-50 (0.2mm/300mm, 50 microns axial play). As standard the new series is available in  SCM415H hardened tool steel (HRC58/62) or 440C hardened Stainless Steel (HRC55+). With all the ball screw sizes, a range of flanged, cylindrical and end threaded ball nut design mean that connection to any linear device is made simple. More information

Lead screw investment

Abssac has recently invested heavily in the stock of trapezoidal thread form power screws and nuts in what is seen as a very competitive move in the market. Now stocking 3 meter lengths of lead screw diameters of 12mm, 16mm, 20mm, 22mm, 24mm, 30mm, 36mm, 40mm and 50mm in both right and left handed formats., the leadscrews are complimented by a range of flanged or non flanged Bronze nuts as well as round, hex and square steel nuts.   Abssac is also offering a free cut to length service on all the screws.
Mr. Phil Jones of Abssac's linear product sales department states, "Abssac is committed to reducing the unit prices of both lead screws and nuts and having this additional stock means that we can now service the demands of our customers better “. More information

Best regards

Chris Cattle - Senior technical products manager

Tel : 01386 421005

Email : sales@abssac.co.uk