Electric Hammer
Electric Hammer
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 Portable Rotary Corded Drill Demolition Jack Hammer Concrete Breaker Electric $109.95 (1 Bid) Time Remaining: 5h 49m |
 Portable Rotary Corded Drill Demolition Jack Hammer Concrete Breaker Electric $109.90 Time Remaining: 16d 6h 36m Buy It Now for only: $109.90 |
 New 1 Electric Rotary ROTO Hammer SDS Concrete Drill Chisel Kit 3 Function $53.88 Time Remaining: 3d 19h 52m Buy It Now for only: $53.88 |
 Makita HR4002 1 9 16 SDS MAX Rotary Hammer Tool Electric 10 Amp $369.99 Time Remaining: 12d 1h 58m Buy It Now for only: $369.99 |
 Portable 3in1 SDS Rotary Concrete Breaker Electric Drill Demolition Jack Hammer $89.95 Time Remaining: 9h 5m Buy It Now for only: $98.95 |
 1 1 2 SDS ELECTRIC ROTARY HAMMER DRILL VARIABLE SPEED $69.99 Time Remaining: 11d 6h 56m Buy It Now for only: $69.99 |
 Hilti TE 2 SDS Plus Rotary Hammer DrillCordedElectric1 2 Steel3 4 Concrete $99.95 Time Remaining: 26d 20h 36m Buy It Now for only: $99.95 |
 ELECTRIC DEMOLITION JACK HAMMER WITH PUCH CHISEL TOOLS $125.99 (1 Bid) Time Remaining: 1d 34m |
 Black Decker Heavy Duty Electric Hammer Model 5015 Type 2 $55.00 Time Remaining: 10d 21h 32m Buy It Now for only: $55.00 |
 Black Decker Heavy Duty Electric Rotary Hammer Model 5050 Type 4 $75.00 Time Remaining: 10d 4h 37m Buy It Now for only: $75.00 |
 1 Electric Rotary Hammer Drill with drill bits and chisel Roto Tool $51.20 Time Remaining: 18d 19h 38m Buy It Now for only: $51.20 |
 Hoteche 1 Electric SDS Rotary Hammer Drill With Bits SDS+ Roto Tool 3 4HP DIY $65.99 Time Remaining: 1d 3h 12m |
 Portable 3in1 SDS Rotary Concrete Breaker Electric Drill Demolition Jack Hammer $89.90 Time Remaining: 13d 6h 8m Buy It Now for only: $89.90 |
 Black Decker Heavy Duty Electric Rotary Hammer Model 5050 Type 3 $75.00 Time Remaining: 10d 4h 34m Buy It Now for only: $75.00 |
 120 AC Portable Demolition Jack Hammer Concrete Breaker Electric $63.00 Time Remaining: 1d 5h 17m Buy It Now for only: $69.99 |
 Chicago Electric Rotary Hammer Drill 1 Model 97743 $24.99 Time Remaining: 24d 17h 22m Buy It Now for only: $24.99 |
 1 Electric Rotary Hammer Drill With Bits SDS Plus Roto Tools 3 4HP Hoteche $67.50 Time Remaining: 11d 23h 52m Buy It Now for only: $67.50 |
 HOTECHE 1 ELECTRIC ROTARY HAMMER DRILL WITH BITS SDS PLUS ROTO TOOL 3 4 HP $64.99 Time Remaining: 1d 6h 40m |
 Makita HR5000 2 Rotary Hammer Spline Tool Kit Electric AC DC $849.99 Time Remaining: 1d 22h 38m Buy It Now for only: $849.99 |
 2in1 15lb Portable Electric Demolition Rotary Hammer Concrete Breaker Core Bits $109.90 Time Remaining: 16d 6h 36m Buy It Now for only: $109.90 |
 Hoteche 3 4HP 1 Electric Rotary Hammer Drill With Bits SDS Plus Roto Tools Case $66.99 Time Remaining: 11d 4h 40m Buy It Now for only: $66.99 |
 1 1 2 ELECTRIC ROTARY HAMMER DRILL BITS CHISEL PUNCH VARIABLE SPEED $64.99 Time Remaining: 1d 17h 58m |
 MILWAUKEE ELECTRIC TOOL HAMMER 5360 3 4 4 A AMP 115V $70.00 Time Remaining: 11d 20h 18m Buy It Now for only: $70.00 |
 NEW ELECTRIC ROTARY HAMMER DRILL 1 inch CHUCK TOOL $79.99 Time Remaining: 15d 5h 18m Buy It Now for only: $79.99 |
 Portable Rotary Corded Drill Demolition Jack Hammer Concrete Breaker Electric $109.95 Time Remaining: 2d 19h 31m Buy It Now for only: $120.95 |
 SKIL ELECTRIC HEAVY DUTY ROTO HAMMER T 5 DRILL MODEL 726 1819 $150.00 Time Remaining: 15d 1h 6m Buy It Now for only: $150.00 |
 HOTECHE 1 ELECTRIC ROTARY HAMMER DRILL WITH BITS SDS PLUS ROTO TOOL 3 4 HP $64.59 Time Remaining: 3d 6h 21m Buy It Now for only: $64.59 |
 Portable 3in1 SDS Rotary Concrete Breaker Electric Drill Demolition Jack Hammer $89.95 Time Remaining: 2d 23h 50m Buy It Now for only: $98.95 |
 Variable speed 1 1 2 SDS Electric ROTARY HAMMER DRILL $73.99 Time Remaining: 17d 22h 56m Buy It Now for only: $73.99 |
 MILWAUKEE 5361 1 1 2 ELECTRIC ROTARY HAMMER DRILL $229.99 Time Remaining: 3d 18h 31m Buy It Now for only: $229.99 |
 ROTO HAMMER DRILL ROTARY HAMMER ROTOHAMMER ELECTRIC $90.00 Time Remaining: 18d 35m Buy It Now for only: $90.00 |
 1 1 2 SDS Electric Rotary Hammer Drill Variable Speed Heavy Duty Power Tools HD $67.49 Time Remaining: 3d 1h 42m |
 3 4HP Hoteche 1 Electric Rotary Hammer Drill With Bits SDS Plus Roto Tools $66.75 Time Remaining: 12d 1h 32m Buy It Now for only: $66.75 |
 1 ELECTRIC SDS ROTARY HAMMER DRILL 3 FUNCTION BITS PRO $59.99 Time Remaining: 3d 1h 27m Buy It Now for only: $59.99 |
 1 Electric Rotary Hammer Drill With Bits SDS Plus Roto Tools 3 4HP Hoteche $66.99 Time Remaining: 3d 2h 47m |
 HUSKIE ELECTRIC HAMMER DRILL KIT MODEL 11218 $119.00 Time Remaining: 7d 2h 15m Buy It Now for only: $119.00 |
 Makita HR4041C 1 9 16 Spline Rotary SDS Hammer Electric $449.99 Time Remaining: 1d 22h 38m Buy It Now for only: $449.99 |
 Portable 3in1 SDS Rotary Concrete Breaker Electric Drill Demolition Jack Hammer $89.95 Time Remaining: 4d 9h 9m |
 Hoteche 1 Electric SDS Rotary Hammer Drill With Bits SDS+ Roto Tool 3 4HP DIY $66.50 Time Remaining: 11d 22h 49m Buy It Now for only: $66.50 |
 Brand New STAR 3 in 1 SDS Rotary Electric Hammer $199.00 Time Remaining: 6d 22h 59m Buy It Now for only: $199.00 |
 Makita HR4010C 1 9 16 Inch AVT SDS Max Rotary Hammer Electric $609.99 Time Remaining: 1d 22h 38m Buy It Now for only: $609.99 |
 3 4HP Hoteche 1 Electric Rotary Hammer Drill With Bits SDS Plus Roto Tools $66.25 Time Remaining: 4d 19h 49m |
 HITLI TE1 TE 1 ELECTRIC SDS ROTARY HAMMER DRILL NICE $149.99 Time Remaining: 5d 22h 12m Buy It Now for only: $149.99 |
 New Dongcheng CZ26Z1C FF 26 Electric rotary hammer $150.00 Time Remaining: 24d 13h 41m Buy It Now for only: $150.00 |
 Portable Rotary Corded Drill Demolition Jack Hammer Concrete Breaker Electric $109.95 Time Remaining: 5d 22h 5m |
 NEW ELECTRIC ROTARY HAMMER DRILL 1 inch CHUCK TOOL $69.99 Time Remaining: 20d 8h 36m Buy It Now for only: $69.99 |
 New Dongcheng CZ20Z1C FF 20 Electric rotary hammer $140.00 Time Remaining: 24d 13h 19m Buy It Now for only: $140.00 |
How can I make a small earthquake simulator?
I'd liek to build a 1m x 1m x 2m tall wooden box which vibrates like a small earthquake when someone stands inside. I've been looking at all sorts of motors, and even thinking of modifying electric hammering drills, which would then be sandwiched between a sheet of metal (attached to floor) and a wooden floor on top.
Does anyone have any other suggestions? Anyone built an earthquake simulator before, or seen how to build one online?!!
Thanks in advance!!
Due to stability and momentum problems, I would opt for static sides and rely on a loose, moving floor for the simulation.
The floor could be mounted on 4 compression springs and to the under-floor base, two shafts installed, each with a steel cam blank mounted at one end.
The two shafts would be linked by an 'A' belt and a further 'A' belt to a drive shaft behind the 1m square.
The two cam blanks(mild steel discs) would be drilled and each linked to the underside of the floor via a short piece of steel, angle bracket and two HS bolts with lock nuts. This would form an dual eccentric drive to provide vertical movement.
Motor speed would be a problem, which is why I opted for an auxiliary drive shaft at the rear instead of a direct connection to a motor. (1425rpm would be much to fast).
Assuming that your budget does not run to low revving motor and speed controller, experiment directly connecting (using the chuck) a fairly powerful variable speed electric drill to the drive shaft and see how it behaves. Use of springs will have reduced the power requirement so the 1/2HP effective output from an electric drill may be sufficient.
Good Luck.