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John Whittlesea

How to choose a slide for flat (horizontal) mounting

Author: John Whittlesea, Technical support manager

9th Apr 2013

We are often asked the question – which of Accuride’s slide can be flat mounted (horizontal)? It is an important question since not all slides work well in this orientation.

If you’re not sure about any of the technical details then email a question.

Most ball bearing telescopic slides are designed to be mounted in pairs vertically, on the sides of drawers or the moving unit.

There are some slides that can be mounted flat beneath the moving unit.

If slides are mounted horizontally (flat mount) the load rating is decreased to approximately 25% of the vertical load rating. Some slides may have a lower or higher percentage.

Look at the individual product datasheets or in the e-catalogue for this symbol:

Linear slides such as the 1312 and 0115RS perform better when flat mounted because the moving member is fully supported on ball bearings at all times.

The DA0115RC uses re-circulating ball carriages and is ideally suited for this orientation of mounting; see the datasheet for details of load ratings.

Mounting slides in different configurations will affect performance and load rating and we always recommend that you test the slide in the intended application.

Some slides should not be flat mounted

Accuride has many years of experience in designing, testing and using telescopic slides. From this experience we have learnt that some slide profiles are just not suited to being used in the horizontal plane (flat mounted).

Problems can arise with deflection, especially with heavy loads on longer lengths, and with interference between the slide components, which can cause sliding components to grind together where clearances are minimal.

Some ranges have been designed, for example, with minimal wrap on the intermediate member (IMM), or the shape of the outer member (OM) has a flatter shape allowing lateral movement when flat mounted.

These cross sections have no problem handling loads in vertical/side applications, but when used flat, the members and ball retainer could easily disengage from the mating members, or grind / rub together.

Slides suitable for flat (horizontal mounting)
Model Side mounted max. kg* Flat mounted max kg*
0115RC DA see datasheet see datasheet
0115RS 50 60
0201 50 12.5
0204 65 16.25
0301 70 17.5
0305 70 17.5
0305 DS 70 17.5
0330 DS (80,000 cycles) 65 16.25
0330 DS (10,000 cycles) 80 20
1312 50 60
2026 50 12.5
2028 DS (80,000 cycles) 60 15
2028 DS (10,000 cycles) 65 16.25
2728 DS 20 5
3031 DS 80 20
3301 68 17
3307 68 17
3308 68 17
3507 82 20.5
4120 DA (10,000 cycles) 438 219
4120 DA (5,000 cycles) 550 275
5417 (80,000 cycles) 90 22.5
5417 (10,000 cycles) 100 25
7957 160 40
9301 227 45

* Load ratings quoted are the maximum for a pair of slides installed 450mm apart, unless otherwise stated. Load ratings will change according to the length of the slides. See individual datasheets for details.

John Whittlesea

Telescopic drawer slides are rated by load – but what does this mean?

Author: John Whittlesea, Technical support manager

27th Mar 2013

Drawer slide manufacturers always give a maximum load rating for their products and you may be wondering what this means.

This is the maximum load that a pair of slides can carry, but only IF you mount them as instructed and don’t exceed their cycle rating. The stated load ratings are a gross load, so don’t forget to add the weight of the drawer construction materials to your calculations

‘Cycle rate’ is another term that we should explain. When slides are tested they are set up in a test rig with a drawer, or in their application environment, and ‘cycled’ in and out a number of times. One cycle = a complete open and close.

The cycle test is a dynamic load test. Different cycle rates are used depending on the type of slide and the expected application. For example, in applications for the Industrial and electronic market sector, the cycle rate will typically be between 2,000 and 10,000 cycles and for the furniture market sector, the cycle rate will typically be between 50,000 and 80,000 cycles.

All our products are subjected to a static load test at full extension of the sliding elements. The load applied will typically be at least twice that of the dynamic load test. This means the slide will have a 100% static safety factor in the extended position.

Deflection of the drawer and sliding element are measured during the dynamic test phase and this is correlated to the load and number of test cycles completed. Din 68 858 details the allowable percentage of the extension this deflection can be.

Accuride tests all of its standard slides in the same way so that you can compare ‘like for like’. Remember that the tests have been devised for the drawer and component together – there are no standard tests just for slides. If you have an application that is not a drawer – and Accuride slides can be found in many and varied types of applications – then we would recommend that you test the slides in your own situation.

When you look at a product page you will see that we give a load per length, state the cycle rate used for the test and the load rate where flat mounting is available.

Testing methods for drawer slides

The tests are conducted in our in-house laboratories, which are based in each of our design and manufacturing sites around the globe.

The slides are typically mounted 450mm apart and the load is placed with its centre of gravity in the centre of drawer. Measurements are taken and the test rig is then started and will run through the cycles, with further measurements and checks made along the way. As previously mentioned, we test furniture sector slides up to 80,000 cycles and industrial sector slides up to 10,000 cycles, but there are variations. Look at the datasheets for detailed information.

A wider drawer has a negative effect on slide performance and choosing the wrong slide can result in a side-to-side wracking movement that feels loose and unstable. Some of our slides are designed specifically for wider drawer applications and are therefore tested further apart. These are detailed in our product catalogue and website.

Our product is also subjected to slam open and slam shut test elements, which entail slamming the drawer / slide against the open and closed end stops. This test is carried out for 10 slams in both directions at a speed of between 1.25 and 1.85 m/sec, dependant upon the load applied.

Different applications may have their own set of standards for testing and we can accommodate customer requests.

Our general test standards come from a range of national and international sources, such as; BIFMA, ANSI, ISO, BS and Din, etc.

We can also set up tests for a customer’s project. Sometimes we may need to take the test out of house, for example, crash testing for automotive applications.

Things to consider before you select a ball bearing drawer slide, read more.

Peter Baxter

Importance of 24/7 support for distribution sales channels

Author: Peter Baxter, European sales director, distribution channel

11th Mar 2013

An effective distribution channel is of prime importance to many manufacturers where it is part of the product placement strategy. Therefore, manufacturers using a distribution channel need to take particular care to support that channel across many functions.

Different customer segments will need different levels of service and support so it is important to first choose your distribution partners carefully, and secondly work closely with them to support their own marketing and sales.

Dedicated customer site

One area that has been very successful for Accuride is an online customer portal via the company's website.

This portal gives 24/7 access to the latest product information, such as catalogue drawings, photos and CAD drawings, training manuals, order and delivery information, pricing and stock levels. The fact that the web is always open is significant for companies who operate globally and where staff may need information outside of office hours.

Authorised distribution partners can access the Customer Site using passwords and usernames issued by their Accuride sales manager.

One of the more recent upgrades to the Customer Site was the linking to the back office Fourth Shift ERP system.

Fourth Shift integrates our finance and accounting, manufacturing, supply chain management, and customer services so that the information flows between all areas of the organisation. Once an Accuride partner has access to the portal they can link direct into parts of the system and view their past and current orders and delivery times, search their price book, and check live stock data.

Stock availability

Accuride prides itself on being able to hold large off-the-shelf stocks of products ready to ship. We know, from talking to our distribution partners, that being able to check our stocks has been a popular service; it gives them confidence that we can deliver product when it is needed.

Keeping open lines of communication between our sales managers, customer services and marketing department with our distribution partners has been the means to make this sales network so successful in growing both reach and revenue.

Sue Witkowski

Telescopic slides are everywhere - from cradle to grave

Author: Sue Witkowski, Marketing services manager

1st Mar 2013

When people say to me 'What do you do for a living?', and I reply that I market telescopic slides, their response is nearly always - 'What on earth are they?'

I try to explain by drawing a parallel between slides and screw fixings - they are everywhere, but you don't always see them.

Look around and you will see them in kitchen drawers, filing cabinets in cash tills. Sometimes they are hidden, but still provide the movement in sliding car armrests and inside ticket machines. Occasionally you can be surprised by just how much they are part of our lives; from cradle to grave.

The pictures tell the story.

Let us know if you have seen some drawer slides in unusual places.

John Whittlesea

Salt spray testing - ball bearing slides

Author: John Whittlesea, Technical support manager

20th Feb 2013

Customers need to be sure that the slides they buy will have a certain amount of resistance to corrosion. Part of our finish testing includes a salt spray chamber where slides are exposed to a 5% salt solution (similar to a salty fog) to test corrosion resistance.

The test procedures and parameters are standardized under national and international standards, such as ASTM B 117 and ISO 9227. These standards lay down the required information to carry out these tests; covering the test parameters, such as the temperature, the air pressure of the sprayed solution, the preparation of the spraying solution, including the Ph concentration, etc.

Slide test procedures

We have our own internal test laboratories and these include salt spray chambers. When we have a new product, we test each of the component parts as well as a complete assembly. These are placed in a chamber so that all parts are fully exposed to the sprayed solution. The solution must also be able to drain off the surfaces and not form pools.

After the required test period, the parts are dried and examined for traces of corrosion. The results are recorded on official test reports, which outline the test piece specification, the type of finish applied, the test standard used and the appearance of any corrosion.

Corrosion can range from none at all, through to white or red rust depending on the severity of the test and the finish used on the slide.

Minor white rust is a cosmetic effect and generally has no effect on the performance of the coating if the underlying zinc coating retains the specified coating thickness.

Corrosion resistance coatings

Accuride has three levels of corrosion resistance within our range of drawer slides, which include a resistance of 12 hours for the majority of our range, plus 96 hours and up to 500 hours for the high performance surface finishes.

Different coatings are used to achieve the standard and enhanced levels of corrosion resistance and these are applied to the electroplated zinc coat during the automated finishing process.

Case studies...

Aluminium slide for access to heavy equipment in train

Accuride’s distribution partner in the Czech Republic, Arcus Engineering, has been working closely with Kolejové pohony, a.s. to provide a viable...

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Aluminium slide for access to heavy equipment in train

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