Help ID Makita jackhammer
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mooman
Well-known member
Looks to be a HM1500B. Although it looks like it's missing the tool retainer from the picture.
It should take a 1 1/8" steel shank.
Try this link for the parts detail.
http://www.toolpartspro.com/image/HM1500B/HM1500B-Makita-PB.pdf
It should take a 1 1/8" steel shank.
Try this link for the parts detail.
http://www.toolpartspro.com/image/HM1500B/HM1500B-Makita-PB.pdf
rlitman
Well-known member
I've got an HM1301, and this looks to be a newer model.
Yours looks to be an HM1500
The tool retainer is there. Unlike bigger hammers, this doesn't use standard air tool steel, but instead uses a 1 1/8" hex with a cutout that engages a lock pin. You pull on the spring loaded pin, and turn it 180 degrees to release the tool.
All of the Makita tools I've seen for these also have a round end, and I believe that a standard 1 1/8" tool will not reach the internal hammer in these, because the hex must be turned to round for the last couple of inches.
I've got an extra bull point bit, but it's pretty blunt and may not be worthwhile shipping. Where are you?
Yours looks to be an HM1500
The tool retainer is there. Unlike bigger hammers, this doesn't use standard air tool steel, but instead uses a 1 1/8" hex with a cutout that engages a lock pin. You pull on the spring loaded pin, and turn it 180 degrees to release the tool.
All of the Makita tools I've seen for these also have a round end, and I believe that a standard 1 1/8" tool will not reach the internal hammer in these, because the hex must be turned to round for the last couple of inches.
I've got an extra bull point bit, but it's pretty blunt and may not be worthwhile shipping. Where are you?
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Thank you so much for the information. I am in San Carlos, Ca close to San Francisco.
Could you measure the diameter and length of the round part that goes into the tool? Yours is the first I have been able to see. Maybe I can grind the round part onto the hex shank? HF had some hex shank tools without the round cylinder on the end.
Could you measure the diameter and length of the round part that goes into the tool? Yours is the first I have been able to see. Maybe I can grind the round part onto the hex shank? HF had some hex shank tools without the round cylinder on the end.
rlitman
Well-known member
I'll see if I can find the time to take some measurements tonight.
I see some tools for sale on eBay that are hex all the way to the bottom, so it is possible that the round is unnecessary, but the groove you can see in the hex on my chisel is important. That's how the tool is retained.
This appears to be a Chinese clone of this machine:
http://www.harborfreight.com/11-amp-120-volt-breaker-hammer-68150.html
and there is a possibility that it's replacement chisels will work outright.
This appears to be a clone of the Bosch Brute:
http://www.harborfreight.com/15-amp-120-volt-professional-breaker-hammer-kit-68147.html
The HF description and pictures lead me to believe that both use the same type chisel, and the second machine is listed to use a 28mm chisel, while it appears that my Makita takes a 30mm. I guess I'll have to take measurements of the chisels from my Makita and Bosch, and get back to you.
I see some tools for sale on eBay that are hex all the way to the bottom, so it is possible that the round is unnecessary, but the groove you can see in the hex on my chisel is important. That's how the tool is retained.
This appears to be a Chinese clone of this machine:
http://www.harborfreight.com/11-amp-120-volt-breaker-hammer-68150.html
and there is a possibility that it's replacement chisels will work outright.
This appears to be a clone of the Bosch Brute:
http://www.harborfreight.com/15-amp-120-volt-professional-breaker-hammer-kit-68147.html
The HF description and pictures lead me to believe that both use the same type chisel, and the second machine is listed to use a 28mm chisel, while it appears that my Makita takes a 30mm. I guess I'll have to take measurements of the chisels from my Makita and Bosch, and get back to you.
rlitman
Well-known member
Ok, I took those measurements, and a closer look at my machine.
From flat to flat, the hex for my machine is nominally 30mm. I didn't measure the machine, but I'm guessing that will be close to 30mm, and the tool is undersized by about 0.3mm for clearance.
The "groove" is just about 3mm deep, and has radiused corners (one measurement is between the bottom of the corners, the other is between the tops).
The 52mm (plus a radiused shoulder that's not clearly drawn in of about 4mm) round section at the back of the tool is absolutely required.
I know this, because I grabbed a tool from my Bosch Brute (which is hex all the way back, but looks to be the smaller 28mm flat-to-flat size that HF is using), and it does not go into this machine sufficiently to reach the hammer. Looking into the business end, you can see that there is a round chamber which the tool must fit into behind the hex (it looks a lot like an air chisel).
Hope this gets you on the right track.
From flat to flat, the hex for my machine is nominally 30mm. I didn't measure the machine, but I'm guessing that will be close to 30mm, and the tool is undersized by about 0.3mm for clearance.
The "groove" is just about 3mm deep, and has radiused corners (one measurement is between the bottom of the corners, the other is between the tops).
The 52mm (plus a radiused shoulder that's not clearly drawn in of about 4mm) round section at the back of the tool is absolutely required.
I know this, because I grabbed a tool from my Bosch Brute (which is hex all the way back, but looks to be the smaller 28mm flat-to-flat size that HF is using), and it does not go into this machine sufficiently to reach the hammer. Looking into the business end, you can see that there is a round chamber which the tool must fit into behind the hex (it looks a lot like an air chisel).
Hope this gets you on the right track.
