Centralising spacers for tie bars, rock bolts and pile cage applications.
4 active products
Code: CS20
Konsa solid centralising spacers position tie bars, rock bolts, pile reinforcement and anchor bolts within deep holes before grouting. Their rigid, non-flexible construction maintains a consistent stand-off from the hole wall and helps keep the bar centred. Standard models are 60 mm long with a 91 mm outside diameter and internal sizes from 20 mm to 30 mm.
Code: TBS50
Konsa centralising spacers help position tie bars, rock bolts and anchor bolts within deep holes so grout can surround the bar more evenly. Different spacer sizes accommodate a range of hole diameters and tie-bar diameters, as shown in the specification table. Select the model that provides the required stand-off while fitting both the drilled hole and the installed reinforcement.
Code: EC16
Konsa centralising spacer end caps hold the tie bar or anchor bolt at the centre of a compatible centralising spacer assembly. They provide a positive locating point at the end of the spacer and are available for 16 mm, 20 mm, 25 mm and 30 mm rebar diameters. Match the end-cap size to the installed bar and confirm compatibility with the selected spacer.
Code: CR30
Konsa centralising wrap spacers are supplied flat and wrapped around tie bars or rock bolts for quick installation in deep-hole and grouting applications. The spacer maintains separation from the hole wall to support more even grout coverage around the bar. Standard cover options are 25 mm and 50 mm for bars from 16 mm diameter, with custom sizes available to suit project requirements.
Centralising spacers are used to position tie bars, rock bolts, anchor bolts and pile reinforcement within drilled holes or bores before grouting.
By maintaining separation between the installed bar and the surrounding hole wall, a suitable centralising spacer helps keep the reinforcement positioned within the bore and allows grout to flow around the bar more evenly.
Konsa supplies solid, wrap-around and component-based centralising spacers for mining, civil engineering, piling and deep-hole grouting applications.
A centralising spacer is fitted around or onto a tie bar, rock bolt, anchor bolt or reinforcement member before it is inserted into a drilled hole.
The spacer creates a controlled stand-off between the installed bar and the wall of the bore.
This helps prevent the bar from resting directly against one side of the hole and assists with maintaining space around the reinforcement for grout placement.
Different centraliser designs are available depending on:
Where a bar or bolt is installed directly against the side of a drilled hole, the available space for grout around the reinforcement can become uneven.
A correctly selected centralising spacer helps maintain separation between the reinforcement and the bore wall.
This can assist with:
Centralising spacers can be fitted to compatible rock bolts to maintain separation from the bore wall before grouting.
Used to position tie bars within drilled holes where controlled stand-off is required.
Centralisers can help maintain anchor bolt position during installation and grouting.
Centralising products can be used with suitable reinforcement assemblies in piling and deep-foundation applications.
Centralisers help position reinforcement within drilled bores where grout is introduced around the installed bar.
Suitable centralising products may form part of ground-support and reinforcement installations where bolts or bars are grouted into drilled holes.
Rigid centralisers designed to position compatible bars or bolts within drilled holes while maintaining a defined stand-off from the bore wall.
View product →Purpose-made centralisers available in different sizes to suit compatible combinations of drilled-hole diameter and installed reinforcement.
View product →End caps provide a locating point between a compatible centralising spacer and the installed tie bar or anchor bolt.
View product →Wrap spacers are supplied flat and fitted around compatible tie bars or rock bolts, providing a convenient installation option for deep-hole and grouting applications.
View product →Different centraliser designs suit different installation requirements.
Solid Centralisers
Rigid solid centralising spacers maintain their manufactured shape and provide a fixed geometry around the installed bar.
They can be suitable where a robust, non-flexible spacer is required.
Wrap-Around Centralisers
Wrap spacers are supplied in a flat or open configuration and are fitted around the bar during installation.
This can make them convenient where the centraliser needs to be installed onto an existing tie bar or rock bolt.
The correct design should be selected according to the reinforcement diameter, drilled-hole dimensions, required stand-off and installation method.
Stand-off is the distance created between the installed reinforcement and the surrounding bore wall by the centralising spacer.
The required stand-off depends on the relationship between:
A spacer must fit comfortably within the drilled hole while still providing the required separation around the installed bar. Confirm dimensions against the product specifications on this page and the project drawings.
The correct spacer should be selected according to the dimensions of both the installed reinforcement and the drilled hole.
Before selecting a centraliser, confirm:
Where dimensions are uncertain, customers can provide Konsa with the bar diameter, hole diameter and intended application so that a suitable product can be identified from the available range.
Many centralising products are used in installations where a bar or bolt is grouted into a drilled hole.
The spacer's function is to maintain separation between the reinforcement and the bore wall while the assembly is positioned.
This creates space around the bar through which grout can be introduced.
Grout type, grout placement method, hole preparation and the overall reinforcement design remain project-specific engineering considerations. A centraliser alone does not guarantee complete grout coverage or structural performance.
Konsa supplies centralising spacer products for tie bars, rock bolts, anchor bolts, pile reinforcement and related deep-hole grouting applications across mining, construction and civil engineering projects.
The range includes rigid solid spacers, conventional centralisers, compatible end caps and wrap-around spacer designs, listed under construction products.
Customers can use the existing product specifications on this page to identify a suitable configuration based on their bar and hole dimensions.
Send Konsa the tie-bar or bolt diameter, drilled-hole diameter and application and our team can help identify a suitable product from the available range.
A centralising spacer is fitted to a tie bar, rock bolt, anchor bolt or reinforcement member to maintain separation between the bar and the wall of a drilled hole before and during grouting.
They are used to help keep reinforcement positioned within the drilled hole and maintain space around the bar for grout placement.
Typical applications include rock bolts, tie bars, anchor bolts, pile reinforcement, mining ground support and other deep-hole grouting installations.
Selection depends primarily on the diameter of the installed bar or bolt, the drilled-hole diameter, the required stand-off and the installation method.
A solid centraliser has a rigid manufactured form, while a wrap centraliser is fitted around the bar during installation. The preferred design depends on the application and installation method.
A compatible end cap helps locate the tie bar or anchor bolt within the centralising spacer assembly and should be matched to both the bar size and spacer being used.
No. Centralising spacers help maintain separation between the reinforcement and the bore wall, but grout coverage also depends on hole preparation, grout properties, placement method and the overall installation procedure.
Yes. Provide the bar or bolt diameter, drilled-hole diameter and intended application and Konsa can help identify suitable products from the available range.