Search Results

Please follow the following instructions: Castors or glides can easily be changed over as follows: Turn the chair upside down and support the weight on a table or desk which is stable. Pull out the castor or glide by holding the main wheel and casing.   The metal pin which fits into the chair base should pull out of the chair base and remain with the castor.   If this is not the case, the pin can be removed separately with a pair of pliers or mole wrench. Insert the required castor or glide into the foot of the chair base.

Please follow the following instructions: Extend the chair to its maximum height with the gaslift handle. Turn the chair upside down and rest it on a workbench. Spray lubricant (eg WD40) where the gas cylinder fits into the mechanism and at the point where the gas cylinder fits into the five-star base. Let oil solution soak in. NB: the longer this has to soak in the easier it will be to separate the chair parts. Ideally let the oil solution soak for several hours or overnight. Hold the five-star base with your hand and using a heavy soft hammer such as copper or hide, strike the bottom of the gaslift as shown on Diagram 1 until the base separates and lifts away from the gaslift. If the chair is fitted with a footring, untighten the locking handwheel from the footring to loosen the footring on the gaslift cylinder. Remove the footring from the base of the gas cylinder. Hold the gaslift and raise the chair above the workbench and using a heavy soft hammer, strike the mechanism as shown on Diagram 2 until the cylinder separates from the mechanism. Wipe the lubricant off the chair parts. Replace the new gas cylinder with the top 'pin' located within the mechanism casing. Replace the footring onto the gas cylinder and tighten the handwheel to secure in to position. The footring should be positioned about half way along the gas cylinder. Replace the chair base onto the base of the gas cylinder and secure into place using a heavy soft hammer. Turn the chair right side up and return to use.

Castors + Glides Both castors and glides are available within our seating range.  These are the terms generally used within the furniture industry but they do create some confusion. The difference between the two is that a castor is essentially a wheel, whereas a glide is basically a foot.   Glides There is sometimes a belief that a  glide  somehow ‘glides along’ and perhaps is somewhere between the two. However, it essentially remains a foot, albeit with rounded sides to facilitate dragging a chair from one position to another. Castors The main concerns users have, are which castor to select for which application.  There are basically three types of castor which have different braking features: 1. Brake loaded The first is  brake loaded  (also known as positive charged or charge braked) which means that the castor is free-wheeling until weight is applied whereupon the castor becomes fully locked and therefore acts as a glide. The application for this type of castor is for supermarket or machinery use where the chair needs to be moved in close to an operation and then locked. 2. Brake unloaded The second type of braking feature is termed  braked unloaded  (also known as interval braked) which means that the castor is partially braked until weight is applied but then retains a minimal brake. This is the standard safety castor used within our seating ranges. The application for this type of castor is for use on hard floors such as vinyl or coated concrete, where potentially the chair could move away as the operator goes to sit on it thus presenting a safety risk. Use of the interval braked castor will minimise this risk. 3. Freewheeling The third type of ‘braking feature’ is no brake at all which is termed  freewheeling.  The castor spins very freely thus allowing total ease of movement. The application for this type of castor is predominantly within an office environment, on carpeted floors. There are further variations to the above castors. Tyres Firstly, all three castors can be supplied with either soft tyres or hard tyres. The purpose of the soft tyre is for use on hard or vinyl floors to prevent scratching onto the floor itself.   Static Dissipative A further variation is the possibility of static dissipative castors and glides for static control areas. The above criteria should be considered when specifying the type of castor or glide required. We undertake our best efforts to advise the user on the correct castor or glide. It is not recommended that castors are used for intermediate or high gaslift models. In most cases within our product range the brake unloaded castors are specified for use on cleanroom, conductive, sterile environment or warehouse floors. There is often a conflict between the requirements of the operator and the customer or the manufacturer’s safety concerns. In order to facilitate fast movement between different operations or to accommodate social activity, operators sometimes prefer the free wheeling castor but we recommend against this as it represents a serious safety concern. There is often a perception by the operator that when moving a brake unloaded castor chair between activities there is something wrong with the castors. However, this is the brake effect slowing the chair even when unloaded. Oxford Seating does not accept liability where a user specifies free wheeling castors on hard floors or any type of castor for intermediate or high gaslift use. We recommend the use of glides for both high and intermediate chairs, although we are prepared to supply castors fitted to the chairs at the liability of the customer. Please seek further advice if in any doubt regarding the correct application.

If you work at a workbench or a laboratory bench or perhaps an isolator or glove box, some of the normal rules which are relevant to sitting at a desk do not apply. You can avoid injury or discomfort by sitting in the right position on the right type of chair and following these suggestions: Support your back - A properly adjusted chair will reduce the strain on your back. Get one that's easily adjustable so you can change the height, back position and tilt and where possible, also the seat tilt. If you're leaning forward at all, such as into a microscope or glove box, then correct back support is essential. Your knees should be below the level of your hips. A footrest or footrail may be necessary to support this position. Adjust your seat - Be aware of the various adjustments that it is possible to achieve with your chair. In particular, if other people use your chair such as with multi-shift operations or the shared use of equipment, you may need to re-adjust your chiar each time you use it. Where to rest your feet - Your feet clearly cannot be flat on the floor as when sitting at a desk. It is important, therefore to have a footring supplied with all draughtsman chairs. In some cases, it is also useful to have an independent footrest or footrail under the bench, although many isolators for example, do not allow space for this. It is important to maintain the correct height position of the footring in relation to a comfortable and supportive position for your feet. It is also an important safety feature to use the footring for getting on and off the chair, particularly with vinyl chair which can be slippery, when wearing lab or cleanroom clothing. Make objects accessible - Postion your chair in the right place to be able to reach the objects with which you are working. Try to avoid over-reaching, again particularly on a vinyl chair to avoid slipping from the chair. As a general rule, don't sit in the same position for long periods. Try to change your posture as often as practical. Some movement is desirable, but avoid repeating stretching to reach objects. Work safely! - Working on a draughtsman chair is more challenging than on a desk height chair. Make sure that you are comfortable and feel safe on the chair at all times and make any adjustments before you start working.