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John Whittlesea

When you don’t want a telescopic slide that has a disconnect feature

Author: John Whittlesea, Technical support manager

23rd Jun 2014

A slide with a disconnect feature is extremely useful. It allows the drawer member to be separated from the rest of slide.

This has benefits both for the assembly of the application and also for the end user. First it means that you can take the drawer member and mount it to the moving part of the application – such as a drawer, possibly in a separate part of the manufacturer’s facility. The remainder of the slide, commonly the cabinet and intermediate member, can be fixed into the cabinet. It is then a simple matter of bringing the two parts of the application back together and assembling the moving element into the cabinet, making the slide fitting and installation very easy.

Secondly, while in use, the drawer / moving element can be easily removed for maintenance, cleaning or replacement, etc. and then reinserted.

drawer slide with disconnect

However, there are times when you either don’t want this disconnect feature or you have some procedure in place to ensure the safety of the user.

Imagine mounting a heavy piece of equipment (this is where our heavy duty slides come in) on a slide such as the 9301. With a heavy load you would not want a slide that disconnected. The last thing you need is a slide that can come apart and dump the equipment on your feet.

Also, if you are mounting something that is very wide and / or heavy, you must consider the health and safety aspects of disconnection. It is likely that you will not be able to release both of the disconnect levers and easily hold the application with both hands.

Where a medium duty slide with disconnect, such as our 3657 series (up to 124 kg) is used, you should have procedures in place to ensure the safe disconnection of heavier loads. Or simply choose non-disconnect slides. You would find it impossible to hold a fully loaded drawer in position to re-assemble the separated slide members. It is always best to factor in a two-person or mechanical procedure to assemble and disconnect the moving element of an application, especially if the full load is applied.

If in any doubt you can contact your local Accuride distributor or email our Technical Manager with your questions.

1st Jun 2014

Self-close and soft-close are similar mechanisms that provide the slide with two different styles of closing action.

A slide with self-close will close the slide by engaging the mechanism in the rear of the cabinet member using a pin element on the drawer member. The closing action is very positive and is performed by a spring that has no damping.

Slides can have different closing forces to pull in different loads. The mechanism also acts as a hold-in, by virtue of the spring pressure holding the slide closed – preventing the slide from bouncing open.

Because the mechanism requires a spring force to pull the load closed, this will also affect the opening force; the spring rate needs to be overcome while opening the drawer. Let’s image a self-close slide on a drawer. The user will feel a resistance from the spring while opening the drawer, but this will disappear once the slide has been released from the spring.

A soft-close slide has all the same benefits and attributes of a self-close, but with the added feature of a smooth dampened closing movement.

This helps prevent the slide from slamming closed. The damper is normally positioned in the mechanism at the rear of the slide, similar to the self-close, and controls the closing action.

This mechanism also acts as a hold-in, stopping the slide from bouncing open. Because the mechanism requires a spring force to pull the load closed, it will also affect the opening force.

In conclusion:

  • The self-close mechanism does not slow down the closing action of the drawer – it supplies a positive closure.
  • The soft-close mechanism also closes the drawer, but provides a controlled, slow and soft closure, and generally prevents slamming of the attached drawer.

6th May 2014

A hold-out, or detent out feature does exactly this; it holds the slide out in the fully opened position.

But, it is not locked in this position. To overcome the hold you need to provide an additional force to the slide, by pushing firmly, and it will overcome the feature and move inward.

This is a useful feature for slides used on keyboard shelves, for example.

Keyboard slide with hold-out detent

A lock out feature on a slide will be a physical lever or latch that has to be operated before the slide will move. For example, the 9308 has a lever at the front end and the 0305 has a push latch toward the centre of the slide mechanism.

Slides with lock-out are more usually used to support equipment that needs to be held fully open and static during maintenance, for example.

telescopic slide with lock-out

Please email your technical questions to [email protected]

Helle Kinning

How do I choose the correct ball bearing slide for my application?

Author: Helle Kinning, Marketing and distribution support specialist

14th Apr 2014

This is a difficult one to answer since there are so many different slides on the market and even more applications where slides can be used.

Have a look at our market sector and case study pages – you may find a similar application to yours.

Here are ten tips from our engineering group:

1. Is a ball bearing slide the best option? If you have a restricted budget or just need a simple movement carrying very little weight, then don’t forget to look into roller slides or simple friction systems

2. Slides are categorised by load rating so think carefully about the weight that you expect the slide to carry. Remember to add the weight of all the elements to be moved, including the construction materials, into your calculations. This will give you a good starting point to understand the size of slide you need.

3. How far do you need the item to move? This will give you the slide travel or extension. This is the difference in length between a closed and fully opened slide. Slides come in various extensions - part extension, full extension, over travel, linear.

4. How much space do you have to accommodate the slide? Each type of slide has its own side space requirement, but you need to also take into account the profile height of the slide.

5. How far apart will the slides be positioned and will they be side or flat mounted? Slides are typically tested for their catalogue load ratings at 450mm apart and some slides cannot be flat mounted. Those slides that can be flat mounted will have a reduced load rating.

6. What finish do you need? Zinc plated steel is standard, but we also do black, white, stainless steel, aluminium and corrosion resistant coatings.

7. Think about mounting options. How do you want to fix the slide into the application? The majority of slides have screw fixing hole patterns, but there are also slides with bayonet mounting options for fixing into steel cabinets. Or use our ladder strip mounting to allow bayonet slides to be mounted into wooden cabinets.

8. Does the application need a particular function? This will make you think about the additional features that you may need in or around the slide. There are a number of common options such as, detent hold in, disconnect, self close, easy close, lock in, lock out, etc.

9. You can use our slide selector tool on the website to configure a product. You can also save slides to your own Product library to compare features.

10. Can’t see the slide you need? Then ask for help. We are happy to receive your application photos or drawings and give advice. Email your question to [email protected]
You may also want to read our page called ‘How to select a ball bearing drawer slide’.

Read more technical articles on the Accuride blog:

'I want to replace the cabinet slides in my wooden drawer'

'I need to fit a drawer slide, but don’t know how much space to allow between the cabinet and drawer '

'Potential problems of using slides on wide and deep drawers, and ball migration / inching issues'

4th Mar 2014

Since launching the very popular linear track with recirculating ball carriage (DA0115RC), we have received a few questions about fixing the carriage to panels.

This product has proved to have many different types of applications, so we asked our engineering department for a couple of options depending on the panel thickness.

Each carriage has 2 x M5 studs and the two options illustrated show the use of a connector bolt and a Nyloc nut. These are freely available and can be bought from your own fastening supplier.

Please email your technical questions to [email protected].

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...

> Read more

Aluminium slide for access to heavy equipment in train

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