Thursday 1st December 2016

A trusted heavy duty partner

Abssac offers an Industrial ball screw range that effectively converts high torque rotary input into precise high load linear movement.

All industrial ball screws can be delivered cut to length and if required, machined ready to fit into the required support bearing mounts. Utilising the recirculating ball bearing nut technology as the base of the product, the Industrial class ball screws encompass screw diameters from 12mm up to 80mm as standard. In many cases multiple ball circuits, per ball nut, are employed to achieve greater load capacities making the product suitable for many types of application. As the name suggests, the range is aimed at the more industrial type application with dynamic load capacities from 900 to 13449 kgf being catered for. Whatever the load, it will be delivered with both high efficiency and low drive torque. Stocked screw lengths of up to 4500mm are available up to 32mm diameter and screw lengths up to 5600mm long for screws above 40mm in diameter.

Life Expectancy

Abssac is often asked about the life expectancy of the ball screw products it supplies within applications. Whilst this can sometimes be a difficult thing to accurately calculate, as parameters within an application can change during its life, it can nevertheless be achieved. During a recent design brief with one of our packaging machinery customers, a new range of machines were being designed with exceptionally long MTBS. (mean time between service). In fact, the machines unique selling point was to be its reliability and long service intervals. The ball screw to be used would also provide the primary linear movement required within the design, so was a critical part of the design guarantee.
 
Typically our transport  ball screws are rated for millions of mm’s of travel at the rated dynamic load. This is the load at which 90% of a group of identical ball screws will run without flaking for their lifetime. However, they will travel farther than this at lower limits. These load-life relationships are analogous to the B10 rating common in the ball bearing industry. The relationship of load to life is an inverse cube relation. For example, by reducing the customers load by half would increase the life by eight times. (Conversely doubling the load would decrease life by 1/8). Armed with this information Abssac’s customer then made every attempt to reduce the load within the design, which after a great deal of design change was finally achieved.  The end result was a ball screw assembly with the life expectancy required by the customer. For more performance data, aswell as further screw and nut dimensions please see our catalogue.
 

Performance & Dimensional data

Model

Size Ball Dia. Circuits Dynamic Load 1x106 revs C (kgf) Static Load Co (kgf) D D4 Flange Hole No. D5 D6 H1 L1 L2 L7 L11 M-Oil Hole
Nominal Dia. Lead
R12-5T3-FSI 12 5 2 3 410 710 24 32 6 4.5 40 34 10 44 12 5 M6x1P
R16-5T3-FSI 16 3.175 3 900 1700 28 38 6 5.5 48 40 10 44 10 5 M6x1P
R20-5T4-FSI 20 4 1300 3100 36 47 6 6.6 58 44 10 52 10 5 M6x1P
R25-5T4-FSI 25 4 1500 4000 40 51 6 6.6 62 48 12 52 10 5 M6x1P
R25-10T3-FSI 10 4.763 3 1900 4200 40 51 6

6.6

62 48 16 65 10 5 M6x1P
R32-5T6-FSI 32 5 3.175 6 2400 7900 50 65 6 9 80 62 10 66 12 6 M6x1P
R32-10T4-FSI 10 6.350 4 3900 9100 50 65 6 9 80 62 16 85 12 6 M6x1P
R40-5T6-FSI 40 5 3.175 6 2700 10200 63 78 8 9 93 70 10 66 14 7 M8x1P
R40-10T4-FSI 10 6.350 4 4500 12100 63 78 8 9 93 70 16 87 14 7 M8x1P
R40-20T2-FSI 20 6.350 2 1870 4244 63 78 8 9 93 70 20 88 14 7 M8x1P
R50-5T6-FSI 50 5 3.175 6 2900 13000 75 93 8 11 110 85 10 70 16 8 M8x1P
R50-10T6-FSI 10 6.350 6 6165 18511 75 93 8 11 110 85 16 112 16 8 M8x1P
R63-10T6-FSI 63 6.350 6 6192 21409 90 108 8 11 125 95 16 114 18 9 M8x1P
R63-20T5-FSI 20 9.525 5 11536 35194 90 108 8 11 125 95 16 160 20 10 M8x1P
R80-10T6-FSI 80 10 6.350 6 7093 28508 105 125 8

13.5

145 110 20 114 20 10 M8x1P
R80-20T5-FSI 20 9.525 5 13449 47447 125 145 8 13.5 165 130 25 175 25 12 M8x1P

 

End Journal machining

Let us eliminate your potential scrapping of a part when you machine the journel bearing ends yourself. At ABSSAC, we have a the cull capability to supply ball screw machined ready to fit into the application. Our machining capability gives you a high journal concentricity product and can be applied to all screws regardless of diameter.  Lets work together to reduce your scrap rates and supply ball solutions that fit your application every time. We can work directly from your dimensional drawings or if they do not exist, why not supply us with a physical sample for us to copy. Although all types of end machine detail can be supplied we offer a very cost effective basic end journal machining that fits our range of support bearings (see example diagrams below)

To Suit Bearing Type Ballscrew Size D1 D2 D3 L1 L2 L3 W1 W2
BK/FK 10 16 8.0 M10X1.0 10.0 55.0 15.0 12.0 2.0 2.8
BK/FK 12 16/20 10.0 M12X1.0 12.0 39.0 20.0 12.0 3.0 3.2
BK/FK 15 20 12.0 M15X1.0 15.0 67.0 25.0 12.0 4.0 3.5
BK/FK 17 20/25 15.0 M17X1.0 17.0 77.0 23.0 14.0 5.0 4.5
BK/FK 20 25 16.0 M20X1.0 20.0 88.0 34.0 14.0 5.0 5.0
BK/FK 25 32 20.0 M25X1.5 25.0 103.0 39.0 16.0 5.0 7.0
BK/FK 30 40 25.0 M30X1.5 30.0 114.0 46.0 16.0 8.0 8.5
BK/FK 40 50 32.0 M40X1.5 40.0 139.0 55.0 18.0 8.0 12.0

 

 

Linear guides and rails

If you are interested in the using the transport ball screw ranges, do not forget that we also supply the full range of linear guides and rails which can provide the load support in your linear mechanism. Offering excellent rigidity and parallelism during operation the guides can be used in both vertical and horizontal planes.

Following the link to that product page Guides

Thrust and radial bearings

 

Please do not forget to ask for our competitive support bearing prices !

 If you require further technical information, please do not hesitate to contact our sales engineers who will be more than happy to help you with your selection.

Greases and Lubricants

We provide a full range of quality, low cost lubricants for all our linear products including low vapour pressure greases for clean room and vacuum applications. For example the new Trigel line is specifically formulated to offer a lubrication solution for a wide range of linear motion applications. Please ask for further details.  Grease features include, Temperature range -30°C to 150°C,  Revolutionary multi-complex soap technology, Greatly extended lubrication intervals typically 3 times longer than conventional soap thickened greases. Good corrosion resistance. Some greases are supplied blue in colour for high visibility.

 

Telephone ABSSAC : 01386 421005