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Makita BDF452HW Drill / Driver makita logo

 Makita BDF452HW Drill / Driver Parts

Page A

 Fig # Part # Img Part Name Availability Price Qty
1862815-1
BDF452 Name Plate
In stock
2 available
 $4.58
2188187-9
Housing Set
In stock
2 available
 $17.74
3266130-9
Tapping Screw Bind PT 3X16
In stock
25+ available
 $0.99
4125366-8
Speed Change Lever Assembly
In stock
2 available
 $3.99
5419250-0
F/R Change Lever
In stock
25+ available
 $3.99
6650583-6
Switch
In stock
16 available
 $25.98
7631735-8
LED Circuit
In stock
2 available
 $5.50
8643838-6
Terminal
Note: will need to order Battery BL1830. Old battery will not work.
In stock
14 available
 $5.95
9251472-4
Flat Head Screw M6X26
In stock
21 available
 $3.99
10763193-1
Keyless Drill Chuck 13,BDF452HW
In stock
11 available
 $35.48
11125348-0
Gear Assembly
In stock
25+ available
 $27.81
12638425-4
Yoke Unit
In stock
10 available
 $33.19
13619198-8
Armature
In stock
10 available
 $19.45
14638494-5
Brush Holder
In stock
8 available
 $4.12
15CB440
Carbon Brush Set CB-440
In stock
25+ available
 $4.69
Fig #Part #ImgPart NameAvailabilityPrice
16263032-0
Rubber Pin 4
In stock
13 available
 $2.99
17419601-7
Rear Cover
In stock
1 available
 $3.99
18266130-9
Tapping Screw Bind PT 3X16
In stock
25+ available
 $0.99
19188187-9
Housing Set
In stock
2 available
 $17.74
20232182-2
Leaf Spring
In stock
25+ available
 $2.99
21689150-0
Heat Sink
In stock
2 available
 $1.14
22911006-2
Pan Head Screw M3X8
In stock
2 available
 $0.35
23810292-1
Caution Label
In stock
2 available
 $0.53
26324705-1
Belt Hook
In stock
19 available
 $2.99
27251314-2
Screw M4X12
In stock
25+ available
 $0.99
1005BL1815
Makita 18V Li-Ion Battery (2.0 Ah)
In stock
3 available
 $82.19

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Drill PartsDrill Parts    Cordless Drill Parts  Drill Parts

Repair Articles

How to Diagnose a Bad Power Cord or Switch
How to Diagnose a Bad Power Cord or Switch

This article outlines the basics of power tool and appliance electrical diagnosis. You can use a multimeter to test tool and appliance cords and switches, the two parts usually responsible for electri...
How to Remove a Stuck Drill Chuck
How to Remove a Stuck Drill Chuck

Broken gearboxes and sticky chuck screws can make removing a drill chuck difficult. This article explains the tricks you need to overcome these common repair setbacks.
How to Remove an Armature Bearing with a Vise
How to Remove an Armature Bearing with a Vise

This article explains one backup method for removing armature bearings when a bearing puller isn't available.
Drilling, Fastening, and Hammering Power Tools
Drilling, Fastening, and Hammering Power Tools

This article lists the major categories of drilling, fastening, and hammering tools, and explains the basic applications, types, and features of each.
Repair Stories
Symptom:
Broken Part
Parts Used:
Part Number:
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Entry Date:2013-10-11 15:35:13
2 of 5 customers found these instructions helpful
Clutch housing broke
Remove Battery. Remove chuck. Remove from rear of drill. Remove remaining screws from side of drill.Split housing. Pull out motor/clutch combo. separate motor from clutch. Attach new clutch assembly to motor. place motor /clutch combo back into housing. Replace other half of housing. Replace side screws. replace rear piece and screws. Reattach chuck and center screw.
Did these repair instructions help you?
Discussion
Discussion for the Makita BDF452HW Drill / Driver

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  • Subject:
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1191057
Question: Springs- Brush Holder

1191057

Can you send me a closeup pic of how those 2 springs are installed? I checked the pic of the part, but it doesn't show what the hook end of the spring is connected to. I took a pic with my cel, and lucky me it didn't save. Thanks,
Fabian
Esteban
Question: Chuck Wobble

Esteban

Hi, What causes my chuck to wobble? I've had the drill for a couple of years and the problem just started. I've just replaced the chuck thinking that was the cause but it wasn't.. Any suggestions?
WJA
Reply: Chuck Wobble

WJA

Hello Esteban,

Try removing the new chuck and then run your drill to see if you have any wobble on the shaft, which is part of the 125348-0 Gear Assembly. If it does have some run out you will need to replace the gear assembly.

-WJA
1174248
Question: 452 Won't Charge

1174248

When the battery is not in the charger the charger green light flashes. When I plug in the battery the red and green lights both flash and the battery doesn't recharge. Help! I love this drill.
WJA
Reply: 452 Won't Charge

WJA

Hello 1174248,

It is normal for the green light to flash when a battery is not in the charger. When you put your battery in, and both the green and red lights flash. That is telling you that you have a defective battery, perhaps one or two of the cells has gone bad. It may be time for a new battery.

-WJA
huxley
Question: Makita BDF452

huxley

I need to know how to install the leaf spring.
WJA
Reply: Makita BDF452

WJA

Hello huxley,

For your convenience we have prepared an article and video to help you with your repair. Here is the link to it.

How to Replace the Leaf Spring on a Makita Power Drill.

Hope this helps,
-WJA
mkellerm
Question: BDF452 High Speed Is Slower

mkellerm

My drills high speed setting is now running at half to 3/4 the normal speed. Any recommendations on how to proceed. It doesn't seem to sound right in either high or low either, the pitch seems to be off..
WJA
Reply: BDF452 High Speed Is Slower

WJA

Hello mkellerm,

It sounds like the high speed it starting to deteriorate in your 125348-0 Gearbox. May be time to get a new one.

-WJA
alfred
Question: Stuck Bit

alfred

i am unable to remove the bit from the chuck to remove the bolt can you help.thanks
Tinkerdave
Reply: Stuck Bit

Tinkerdave

Hi alfred,
If the chuck collar will not loosen the jaws you will have to used a cut off wheel and carefully cut the casing of the chuck and then cut the rotator ring for the jaws.Then you will be able to tap the jaws down far enough to remove the bit.Hope this helps.Good luck.
Tinker
I was wondering if it a common problem for the foward\reverse swithc to go out on these drills. Mine got stuck to day and didnt want to change easily. after sliding it back and forth a few times, the drill is now in reverse and the switch just slides back and forth with no directiopn change. I had the same problem a brand new one not even 6 mos old. Just wondering if its common to have this occur?
Tmar
Question: Rubber Pin 4

Tmar

Where does Rubber Pin 4 go, and what does it do?
bivman
Question: BDF452 Brake

bivman

My electric brake quit working, is that a function of the switch?
WJA
Reply: BDF452 Brake

WJA

Hello bivman,

You are right, most of the time a defective switch will be the cause of the brake not working on your drill. Just for chance you might check your brushes before you replace your switch though.

-WJA
corbel
Question: Bit Holder # 784637-8

corbel

is there a replacement for this part ??
rando
Question: Makita BDF452 Leaf Spring

rando

Does anyone know how to install the leaf spring that goes somehow under the speed select switch on the gearbox?

Thanks
rando
Reply: Makita BDF452 Leaf Spring

rando

Does anyone know how to install the leaf spring that goes somehow under the speed select switch on the gearbox?

Thanks
wiscgeerhed
Reply: Makita BDF452 Leaf Spring

wiscgeerhed

The drawing above is a little deceptive as to its location. It goes in the half that holds everything under the clutch. It's what makes the clicking when you adjust the clutch's position. There is a groove for it under the clutch neck where it enters the housing halves. The little bump in the middle goes up towards the clutch, t-end at the joint of the two housing halves. Hope it's not too vague or miss leading...

Tony
wiscgeerhed
Reply: Makita BDF452 Leaf Spring

wiscgeerhed

The drawing above is a little deceptive as to its location. It goes in the half that holds everything under the clutch. It's what makes the clicking when you adjust the clutch's position. There is a groove for it under the clutch neck where it enters the housing halves. The little bump in the middle goes up towards the clutch, t-end at the joint of the two housing halves. Hope it's not too vague or miss leading...

Tony
WJA
Reply: Makita BDF452 Leaf Spring

WJA

Hello rando,

We have prepared an article and video that I hope will answer your question.

How to Replace the Leaf Spring on a Makita Drill

Hope this helps,
-WJA
WJA
Reply: Makita BDF452 Leaf Spring

WJA

Hello rando,

We have prepared an article and video that I hope will answer your question.

How to Replace the Leaf Spring on a Makita Drill

Hope this helps,
-WJA
Gridman
Question: Chuck Screw (M6x26)

Gridman

I need to change the chuck on my drill. Is the flat head scew a ( right or left ) hand thread? Thank You. Gridman Greg.
Tinkerdave
Reply: Chuck Screw (M6x26)

Tinkerdave

hi gridman,As a rule of thumb drills that have a forward and reverse will have a left hand thread chuck retaining screw and the chuck will be right handed. Hope that helps.
Tinker
cear
Question: 125366-8

cear

how to change parts
Jason
Question: Bad Gear Assembly?

Jason

I was drilling into some steel the other day when the bit snagged and yanked it pretty hard. I now have no power getting to the end of the tool. The motor turns with regular force but I can hold the chuck in my hand with nothing happening. Do I need a new gear assembly?
Lewis
Question: Makita BDF452

Lewis

How is the flat head M6x26 removed so the the chuck may be removed? And, how is the gear assembly removed? The chuck and motor seem to be working well, but when a load is applied (i.e. drilling a hole) the chuck stops and the motor is still working. I suspect that the gear assembly is broken.
Thanks
ED
Question: HOW TO REMOVE CHUCK

ED

I have removed the inner screw but how do you remove the rest of the chuck? I am trying to replace it because it won't tighten anymore.
Cliff
Reply: HOW TO REMOVE CHUCK

Cliff

Get the biggest Allen wrench you can fit in the chuck and insert it with the long arm out. Set the clutch to drill and the transmission to low gear. Set the drill on a solid surface. Wack the Allen wrench a few times with a hammer so it turns the chuck in a counterclockwise direction looking at the front of the drill.
Randy
Question: Leaf Spring

Randy

Hi,
I disassembled my drill to replace the armature. During reassembly I noticed an extra part, the leaf spring. Could you please let me know exactly where this spring goes and its installation procedure.

Thanks.
JAYCAN
Reply: Leaf Spring

JAYCAN

I am in the same boat. Can someone let me know?
MarkJay
Reply: Leaf Spring

MarkJay

Same problem here. Any luck?
MarkJay
Reply: Leaf Spring

MarkJay

I tried for over an hour trying to put the leaf spring as shown in the diagram and can seem to find the sweet spot.
WJA
Reply: Leaf Spring

WJA

Hello All,

We have had a number of posts regarding where that pesky little leaf spring is located in the Makita Cordless Drills. It's one of those parts that when you take a tool apart it seems to come from no where and land on your work bench, leaving you wondering where it came from. For this reason we have prepared an article and video that will help with this issue.

How to Replace the Leaf Spring on a Makita Drill.

Hope this helps,
-WJA
Alfonso
Question: Armature

Alfonso

When I release my trigger it is not stopping does that mean the armature is bad?
Mark
Reply: Armature

Mark

Hi Alfonso,

It sounds to me like the trigger switch is bad. The switch is part #650583-6 and is available from http://www.ereplacementparts.com.

Good luck with your repair!

-Mark

MarkJay
Reply: Armature

MarkJay

It's the switch. Just replaced mine. Fixed it right up. Put in new brushes and now it's like a new drill.
chris
Question: Brake

chris

What do i need to replace if the brake is out?
Mark
Reply: Brake

Mark

Hi chris, Check the condition of the motor brushes first. If the brushes seem to have plenty of life left in them then it is likely a bad switch. The brushes are part #194427-5 and the switch is part # 650583-6. Both are available from http://www.ereplacementparts.com. Good luck with your repair! -Mark
josh_jahnke21
Question: Chuck? Slipping

josh_jahnke21

Hey all! I am having trouble with my drill. I bought it a year ago, but lost the receipt, so I'm thinking of repairing it myself, or taking it to a service center... I haven't decided yet. Either way, I am not knowledgeable about the mechanics of drills, and am wondering what is causing this issue I am having. When I put the drill on the second speed, I hear the drill working, but it doesn't actually turn the chuck. What is causing this? What part(s) would I need to replace? At present, it still works on the first speed, and both first and second in reverse, but I am sure it's only a matter of time before those stop working as well. Thanks for your help!
Mystical adviser
Reply: Chuck? Slipping

Mystical adviser

whats your mod#
josh_jahnke21
Reply: Chuck? Slipping

josh_jahnke21

makita bdf452hw
Mystical adviser
Reply: Chuck? Slipping

Mystical adviser

This is the part you need, Gear Assembly [125348-0] - $25.96 at eReplacementParts.com
josh_jahnke21
Reply: Chuck? Slipping

josh_jahnke21

Thank you muchly!
abclovell
Question: Makita 452 Keyless Chuck ??

abclovell

Help!!!, before i twist and break it more than it already is, how do i remove the keyless chuck? Does the whole assembly twist off?? If so which way do i twist?? I believe it's broken, it will not turn at all.
Thanks in advance, mike
Mike
Reply: Makita 452 Keyless Chuck ??

Mike

Hi abclovell. I actually wrote an article on the forum about removing a cordless drill chuck. Here's the thread:

http://forums.ereplacementparts.com/power-tool-repair/8-removing-cordless-drill-chuck.html

There's another version of the article here plus a video, if you want to see it in action:

Removing a cordless drill chuck VIDEO
abclovell
Reply: Makita 452 Keyless Chuck ??

abclovell

Thanks for the help, one more quick question. The chuck is broken with a bit in it, I guess i could use a couple pairs of channel locks. What do you think? Thanks in advance, Mike

PS That video was right on!!
Mike
Reply: Makita 452 Keyless Chuck ??

Mike

You might want to put that drill in a vise and use the channel locks to try and loosen the chuck from the bit. Sometimes you can force the jaws to open. After that you can follow the video to remove the chuck. The problem with using the channel locks to remove the chuck itself is that the chuck screw is still in place. You have to get that screw out before you can remove the chuck.
abclovell
Reply: Makita 452 Keyless Chuck ??

abclovell

OK Thanks again I'm going in......Regards from Maine, Mike
Have you ever bought a tool and after you have used it you thought to yourself "why did I buy this". This sure isn't one of these! I've had mine for over 2 1/2 years and had absolutely no trouble at all. The power is certainly there and the batteries hold up under extreme use and cold weather unlike my Dewalt and Milwaukee Li-ion drills. I would and have recommended this to anyone. Thank you Makita for making such a reliable tool!!!
Bought in summer 2007 for a porch project. Beat on it a lot! Still recharges in 20 mins and is my first choice for all repairs. At $200 (includes 2 batteries) it's pricey (for me) but worth it.
Chris Clark
Review: Makita - BDF452HW
5 star
Chris Clark
Excellent tool. Better then any other brand. Excellent quality...
Accessories
Accessories for the BDF452HW

Hole Saws:
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714025-A
2-1/8" Hole Saw - 5/8"-18 Thread
$9.21

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1-3/8" Hole Saw - 5/8"-18 Thread
$9.18

714008-A
1" Hole Saw - 1/2"-20 Thread
$5.63

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