Easy
Less than 15 minutes
This is an authentic replacement part sourced from original equipment manufacturer. It is generally used on Makita angle grinders and sanders. This wrench allows you to secure a cutter blade/grinding wheel to the tool. Angular profile of this item makes tightening/loosening the lock nut easy, as it stands off from the disc. This wrench is made from metal and it is sold individually.
Lock Nut Wrench 28 782412-6
OEM part for: Makita
Part Number: 782412-6
$12.87
In Stock
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Product Description ?
- U shape is 3/4\\\\\\\" wide by 1/2\\\\\\\" deep.
- Classification: Accessory
- Weight: 0.28 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Lock Nut Wrench 28 will fit the following 45 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 45 matching models.
Makita
Show More Compatible Models45 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Makita
This item works with the following types of products:
- Grinder
- Polisher
- Sander
Customer Part Reviews ?
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Makita 4 1/2" angle grinder spanner wrench
This wrench is for a 5/8" retainer nut for a 4 1/2" Makita Angle grinder. RIGHT TOOL, NOT A MULTI FIT ADJUSTABLE MODEL. Grab the tool and turn.
Delivery was prompt
Guest -
November 14, 2023
Verified Purchase
Great service. Easy website. Perfect parts!
Every time I order something from this website it's just what I need to get my tool working again.
Guest -
May 30, 2023
Verified Purchase
Perfect service
I ordered a wrench and an on-off switch for my old Makita sander. The costs were reasonable, and I received them quickly. And they were correct.
Guest -
March 18, 2023
Verified Purchase
Excellent Experience
All parts needed were stocked and shipping was extremely fast. This is a great company to order what you need.
Guest -
June 2, 2022
Verified Purchase
Right tool, Right Price
Works perfect for my Makita grinder. I should of bought two in case I misplace it again
Guest -
February 8, 2022
Verified Purchase
Tools
Fast, speedy delivery! Items received as advertised!
Melvin L -
August 3, 2019
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Wrench missing
Drew - November 21, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Parts Used
Purchased a matching wrench for the grinder, worked perfectly
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Broken shoulder pin for tool change brake, shoulder pin socket worn; out of shape had to replace head also
Richard - August 4, 2023
Tool Type
Grinder
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Adjustable Wrench, 1/2” wrench, hammer, snap ring pliers, allen socket set
1)Used chisel and hammer to Remove cutting disk
2)loosen set screws if need to remove dust collector
(Will need allen or torq bit sets for this)
2a) remove left and right side dc motor brushes with large flat head screwdriver paying attention to their orientation. Replace if necessary.
3)remove 4 socket head cap screws holding gear housing (one small flat head one medium flat head to gently pry and walk gear housing off from grinder. Careful not to damage the oring)
4)remove 4 phillips screws to pull motor/commutator/drum out from grinder housing
5)wrap motor in rag then gently secure with adjustable pliers, while using a 1/2” wrench to loosen nut holding angle gear in place so you can change the upper gear housing.
5)using snap ring pliers remove retaining ring holding bearing, washer, and grease seal in place (do this slow to see and remember orientation and direction of these three parts. (Crucial for grease seal to be installed in the proper direction) may need to use punch to gently tap out bearing once retaining ring is removed.
6) install the grease seal with brushed side facing out, install bearing, install washer, install retaining ring.
7)after cleaning, use new high temp wheel bearing grease, load the gear housing completely while being sure to pack grease in all cavities. When placing outer gear housing back in place, large gear should be submerged in this grease. Can also add a large coat of grease onto larger gear on outer gear head cover. Be sure to not let any contaminants fall into grease.
8)Instal motor assembly back into large tool housing 9)put ph screws back in cross tightening pattern.
10)install dc motor brushes and put the rest of unit together in reverse order
2)loosen set screws if need to remove dust collector
(Will need allen or torq bit sets for this)
2a) remove left and right side dc motor brushes with large flat head screwdriver paying attention to their orientation. Replace if necessary.
3)remove 4 socket head cap screws holding gear housing (one small flat head one medium flat head to gently pry and walk gear housing off from grinder. Careful not to damage the oring)
4)remove 4 phillips screws to pull motor/commutator/drum out from grinder housing
5)wrap motor in rag then gently secure with adjustable pliers, while using a 1/2” wrench to loosen nut holding angle gear in place so you can change the upper gear housing.
5)using snap ring pliers remove retaining ring holding bearing, washer, and grease seal in place (do this slow to see and remember orientation and direction of these three parts. (Crucial for grease seal to be installed in the proper direction) may need to use punch to gently tap out bearing once retaining ring is removed.
6) install the grease seal with brushed side facing out, install bearing, install washer, install retaining ring.
7)after cleaning, use new high temp wheel bearing grease, load the gear housing completely while being sure to pack grease in all cavities. When placing outer gear housing back in place, large gear should be submerged in this grease. Can also add a large coat of grease onto larger gear on outer gear head cover. Be sure to not let any contaminants fall into grease.
8)Instal motor assembly back into large tool housing 9)put ph screws back in cross tightening pattern.
10)install dc motor brushes and put the rest of unit together in reverse order
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Missing parts
Robert - January 24, 2019
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Specialized lock nut wrench
Bought used Makita grinder at garage sale. All missing parts available thru eReplacementparts.
Exploded tech drawing aided in buying correct parts and reassembly.
Exploded tech drawing aided in buying correct parts and reassembly.
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Sander was lent to a relative who lost the wrench which made the sander useless without it.
Don - March 9, 2016
Tool Type
Sander
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Nutdriver
Parts Used
I was simply able to use the wrench to remove and replace the sand paper discs now.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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