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SmartBolt DTI

SmartBolts: The ultimate bolting solution for excavator maintenance.

SmartBolts are equipped with a visual tension indicator, which removes the need for specialty torque tooling and ensures bolts are at optimal tension levels for enhanced efficiency and safety.

Optimise the installation of your excavator’s slew bearings and track frames and ensure every bolted joint is accurately tensioned, reducing your maintenance costs and improving the safe servicing of your equipment.

Upgrade to SmartBolts and revolutionise your machinery today!

SmartBolt DTI

Excavator bolt kits only in stock!

Slew bearing bolt kits
Trackframe bolt kits
Final drive and sprocket bolts


Limit risk in hazardous areas and prevent accidents. Identify and fix issues before they become problems.


Quickly verify clamp load without touching tools, pausing production, or powering down equipment.


Clear and repeatable preload reading that meets the toughest standards.

DTI Visual Indicator

The DTI Visual Indicator is a colour-calibrated real-time display of tensile load. The indicator is bright red when the fastener is loose and gradually transitions to black when the fastener is tightened to its desired load, or Design Tension.





What are the benefits of SmartBolts?​


The visual indicator in a SmartBolt DTI gradually changes colour according to the amount of tension that is applied to the bolt. The visual indicator is black when Design Tension is reached and red when loose. This colour change provides a real-time indication of bolt tension.

All shipments of SmartBolt DTI will include a DTI Verification Guide, DTI Quick Start Guide, and a Certificate of Compliance. The Certificate of Compliance lists your product specifications (such as dimensions, grade, design tension, and proof load) so that you can verify the product meets your application requirements.

Yes! All SmartBolts® products are warranted to the original end user for one year from the date of purchase.

Yes! SmartBolt DTI are designed to be used with the same tools you’re already using to install and maintain your bolted joints. In cases where the indicator is covered with a tool during use, we recommend tightening the SmartBolt DTI in stages to check the indicator and prevent overtightening.

SmartBolts® are equal to OEM standards and based on the science behind technology the bolts exceed OEM capabilities.

Full traceability right back to the where the forger sourced the material from.

DTI Visual Indication System

The DTI Visual Indicator measures tension. When a bolt is tightened, it is forced to stretch. This stretching force on a fastener is also called tension. Tension creates the clamp force that holds your bolted joints together.

Design Tension is the tensile load on the bolt at which SmartBolt DTI are designed to indicate the “Tight” colour. “Tight” shows the SmartBolt DTI has been properly installed and preload is established.

In general, customers can request Design Tensions ranging from 30 – 90% of the fastener proof strength in increments of 5%. Indicating tensions outside of this range are assessed on a case-by-case basis. All Pre-Engineered SmartBolt DTI have a Design Tension set at 70% of fastener proof strength, which is appropriate for many applications.

No, provided the bolt is not tightened beyond its elastic limit (proof load). As with all bolts, if you tighten beyond the proof load you may permanently deform the bolt, and therefore the indicator will no longer operate correctly. An easy way to check if a bolt has been significantly yielded is to loosen the bolt and check that the indicator matches the “loose” red colour.

Hold the DTI Verification Guide up to the DTI Visual Indicator. It’s good practice to put the intersection of two colors next to the indicator. This way you can compare the indicator color with the guide and know that it is darker or lighter than the color on the guide. Once you reach the TIGHT color, the bolt is properly tight.

Durability and Environmental Conditions

Yes! SmartBolt DTI are designed to operate in the elastic range of the fastener and therefore are reusable for the endurance limit of the bolt.

SmartBolt DTI have an operational service life of over twenty years when used as specified, comparable to that of a solid steel fastener.

In most cases, SmartBolt DTI do not lose any tensile strength. However, when the modification of the indicator protrudes into the threaded or transition regions of the bolt, a reduction in tensile strength will occur. The amount of strength reduction is determined during the engineering analysis and made available to the customer for evaluation prior to ordering.

SmartBolt DTI are specified to operate in environments from -20°C to 75°C. The indicator may not function properly in environments colder than -20°C but will return to normal functionality when temperatures return within the operational limits. Continuous use above 75°C may degrade the indicator permanently.

Within the specified temperature range, your SmartBolt DTI may be expected to perform through all normal environmental conditions. SmartBolt DTI operate well in outdoor, wet weather exposure as well as metalworking fluid environments. For full submersion or direct blast exposure, please contact us for options.

Related Services

Our team of qualified technicians come complete with the specialised tools, vehicles, and training required to effectively perform field maintenance and repairs when and where it’s needed most.

Our first-rate workshops are specifically designed to manage the largest or the smallest of equipment repairs and maintenance. Coupled with the latest cutting-edge technology means we make sure our clients’ service and solution needs are exceeded.

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