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Looking for Makita DGA452 parts? If your Makita DGA452 angle grinder has developed a fault, become noisy, lost power or simply needs a replacement component, you may not need to replace the entire machine.
The Makita DGA452 is an 18V cordless angle grinder with a 115mm disc capacity and a no-load speed of up to 11,000 rpm. It also features anti-restart protection and electronic overload protection.
A wide range of individual replacement components are available for the DGA452, making it possible to repair the grinder and extend its working life.
This guide looks at some of the most common Makita DGA452 spare parts, what they do and what to check when your grinder develops a fault.
Click here to jump straight to: Makita DGA452 Parts (Spare Parts Drawings & Parts List)
The DGA452 has a number of individual components that can be replaced if they become worn or damaged.
Depending on the fault, commonly searched Makita DGA452 parts include:
The exact parts available can depend on the specific version of the DGA452, so always check the model and parts diagram before ordering.
The armature is one of the major internal components of the DGA452 motor.
A damaged or worn armature can cause a range of problems, including unusual noise, poor performance, excessive sparking or the grinder failing to operate correctly.
The DGA452 parts breakdown lists 619218-8 as the armature.
If your DGA452 has developed a serious motor fault, checking the armature is worthwhile before assuming the entire grinder needs replacing.
Carbon brushes are another important component to check on a brushed power tool.
As the grinder is used, the brushes gradually wear down. Eventually, worn brushes can affect the motor's performance.
Possible symptoms of worn brushes can include:
If your DGA452 is showing these symptoms, the carbon brushes and associated components should be inspected.
Always disconnect the battery before inspecting or replacing electrical components.
Bearings allow the internal rotating components to operate smoothly.
A worn bearing can cause excessive noise, vibration or movement inside the grinder.
The DGA452 parts breakdown includes 210042-8, a 629LLB ball bearing, as well as other bearing components.
If your grinder has suddenly become noticeably louder or develops excessive vibration, a bearing could be one possible cause.
The DGA452 uses a geared drive system to transfer the motor's rotation to the spindle.
A damaged or worn gear can result in:
The parts breakdown includes gear components such as 227501-5. Some DGA452 parts diagrams also show different revisions or part numbers, so always check the diagram applicable to your exact machine.
The gear housing contains and supports several of the grinder's internal drive components.
If the housing becomes cracked or damaged, the internal gears and bearings may no longer remain correctly positioned.
A replacement gear housing may therefore be required if the original has suffered physical damage.
The DGA452 parts breakdown identifies the gear housing as 318051-2.
Small components such as O-rings can be easy to overlook when repairing a power tool.
The DGA452 parts list includes several O-rings, including 213407-3 and 213960-9 in the relevant breakdowns.
Although inexpensive compared with larger components, these small parts are important and should be replaced with the correct specification where required.
The DGA452 also contains a number of small retaining rings, washers and other components used to secure and position internal parts.
Examples shown in parts listings include:
These components may be small, but losing or incorrectly replacing one during a repair can prevent the grinder from being assembled correctly.
The spindle is responsible for transferring the rotation from the internal drive system to the grinding disc.
Problems around the spindle can potentially cause excessive movement, unusual noise or difficulty fitting or running the disc correctly.
If the grinder has suffered impact damage or has been heavily used, inspect the spindle and surrounding components for wear or damage.
Remember that the DGA452 uses a 115mm disc and has an M14 spindle thread in the UK specification.
Not every DGA452 problem is caused by a faulty internal part.
If the grinder won't start, stops unexpectedly or appears to have lost power, check the battery before dismantling the tool.
The DGA452 includes battery protection that can automatically shut the tool down when the battery level is low, and it also has electronic overload protection.
Try a known-good compatible battery before assuming the grinder itself has developed a fault.
If your Makita DGA452 won't turn on, work through a few basic checks first.
Make sure the battery is charged and correctly installed.
The DGA452 uses a slide-type on/off switch, so a faulty or damaged switch can potentially prevent the machine from operating.
If the grinder has recently been working under heavy load, allow it to cool and check whether the battery or tool protection system has activated.
If the basic checks don't reveal a problem, worn carbon brushes or another internal electrical component could be responsible.
A DGA452 that suddenly develops a grinding, rattling or squealing noise shouldn't be ignored.
Possible causes include:
A sudden change in noise can be a useful warning that an internal component is beginning to fail.
Stop using the grinder if you suspect a serious mechanical fault and inspect it before further use.
One of the most important things when ordering Makita DGA452 spare parts is making sure you're looking at the correct parts diagram.
Don't rely solely on the appearance of a component.
Two parts can look almost identical but have different specifications or part numbers.
The DGA452 exploded view provides numbered positions that can be matched to individual part numbers. For example, the parts breakdown identifies the armature as 619218-8 and the gear housing cover as 317821-6.
Before ordering, check:
You may come across different versions of the DGA452 when searching for spare parts, including models such as the DGA452Z and DGA452RMJ.
Some parts may be shared between versions, but you shouldn't assume that every component is interchangeable.
Always match the part against the correct model and parts breakdown before ordering.
Parts listings specifically identify DGA452 variants including DGA452ZJ and DGA452RMJ.
If your DGA452 has been reliable for years, replacing one faulty component can be a much more sensible option than replacing the entire grinder.
A relatively small component such as a bearing, gear, switch or brush can potentially be responsible for a larger problem.
Even when a major component has failed, it's worth checking the price and availability of the individual replacement part before buying a new machine.
For anyone who regularly uses power tools, repairing an existing grinder can also help keep a useful machine in service for longer.
A range of DGA452 replacement parts are available, including armatures, bearings, gears, gear housing components, O-rings, retaining rings and various smaller internal components.
The DGA452 parts breakdown lists 619218-8 as the armature. Always verify the part number against the parts diagram for your exact model before ordering.
The DGA452 parts breakdown lists 191971-3 as the carbon brushes. Again, verfify model before ordering.
The DGA452 parts breakdown lists 210042-8 as a 629LLB ball bearing, and 211129-9 as a 6201DDW ball bearing.
The DGA452 is designed for 115mm discs and has an M14 spindle thread in the UK specification.
Yes. Depending on the fault, individual components can be replaced rather than replacing the complete grinder. Common replacement components include bearings, gears, armatures, switches and smaller internal parts.
Use the exact model number and match the component against the corresponding exploded parts diagram. Always check the part number before ordering, particularly where parts have been revised or superseded.
If you're looking for Makita DGA452 parts, identifying the exact component is the first step towards a successful repair.
Whether you need an armature, bearing, gear, switch, housing component or one of the many smaller parts inside the grinder, using the correct part number can save time and prevent ordering the wrong component.
Before carrying out any repair, remove the battery from the grinder and make sure the tool is completely safe to work on. For electrical or internal repairs you're not comfortable carrying out yourself, use a suitably qualified repair professional.
With the correct Makita DGA452 spare parts, there's a good chance that a faulty grinder can be repaired and put back to work rather than replaced entirely.
