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Large radial arm drills - SWP's for the above machinery
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brianw88  
#1 Posted : 12 May 2017 13:36:27(UTC)
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brianw88

Hi,

I work for a Company that use old (not computerised), large radial arm drills. the bed of the drill is quiet large and the tool or die that goes on it are large, so large that the operator must stand on the tool to use and control the drill. the controls are all above the drill head so this creates a problem. You have to be close when the drill is operating therefore making it dangerous. My question is does anyone have the same problem and can anyone surgest a solution to my problem. the bed of the drill is about 700mm off the floor.

Regards brian

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Ron Hunter  
#2 Posted : 18 May 2017 16:08:44(UTC)
Rank: Super forum user
Ron Hunter

So in the scenario you describe, the operators feet and legs are more at risk than hands arms and head. Can guarding not protect the operator from inadvertant contact with the rotating parts?

I' m assuming the workpiece is properly clamped and that there's a decent consideration of work at height safeguards.

Unusual perhaps but not necessarily inherently dangerous?

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Ian Bell2  
#3 Posted : 18 May 2017 23:09:58(UTC)
Rank: Super forum user
Ian Bell2
Radial arm drills are usually fitted with telescopic trip rod mounted close to the drill, to protect against entanglement. The trip is then connected to a DC injection brake which stops the drill if the trip is operated.
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grader  
#4 Posted : 19 May 2017 07:46:59(UTC)
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grader

We also use a number of the old-style radial drills described and what IanBell2 describes is exactly what we have in place - telescopic trip device to cut the drill motion to deadstop in 1/4 turn.

Operators also use magnetic-base screens if necessary.

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brianw88  
#5 Posted : 07 June 2017 19:10:22(UTC)
Rank: Forum user
brianw88

Hi thanks for the replies so far grader,Ian Bell2 and Ron Hunter.

Our radial arm drills are also fitted with the probe stops, but the problem is the close proximity to the drill head when the drill is being operatored and also this situation about working at heights. In some instances the work piece is or could be larger than the bed and guarding the drill head is not feasable because of the shape of some of the work pieces. For the operator to operate he has to be up close and very personal to the drill head by standing or sitting on the work piece.
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