Reverse Circulation Hammers and Bits

RC Hammers

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RC Hammers

The Missile Reverse Circulation line of hammers are used in a wide range of drilling rigs in various geological formations. They are preferred by on-site geologists for their high percentage of uncontaminated sampling; their fast penetration rates; and their trouble-free, low-cost, and long life performance. The pride of workmanship and outstanding engineering make these hammers a superior value. Excellent dependability, service, and support.

RC Hammer Features



RC 400

4 5/8" | 4 3/4" | 4 7/8" | 5" | 5 1/8" | 5 1/4"



RC400 parts breakdown
RC400 Component Parts
No. Description Part No.
1 Back Head 415020
2 NRV Seal R400019
3 NRV R400018
4 NRV Spring R400017
5 Make Up Steel 415016
6 Make Up Rubber 415015
7 NRV Housing 415014
8 Sample Tube Top R400012
9 O-ring -
10 Sample Tube Bottom R400013
11 Air Distributor Inner O-ring -
12 Air Distributor 415011
13 Air Distributor Outer O-ring (2) -
14 Piston 415009
15 Inner Sleeve Cylinder 415008
16 Bit Bearing Bushing 415007
17 Wear Sleeve 415006
18 Bit Retaining Ring O-ring -
19 Bit Retaining Ring 415004
20 4 5/8" Locking Shroud 458400SHROUD
20 4 3/4" Locking Shroud 434400SHROUD
20 4 7/8" Locking Shroud 478400SHROUD
20 5" Locking Shroud 5400SHROUD
20 5 1/8" Locking Shroud 518400SHROUD
20 5 1/4" Locking Shroud 514400SHROUD
20 Shroud Locking Key (2) R400003
21 Chuck w/Lock 415001
- O-Ring Kit 415005

HAMMER SPECIFICATIONS
Length (w/o drill bit) 46.647"
Outside Diameter 4.449"
Weight (w/o bit) 134.1 lbs.
Cylinder Bore 3.518"
Piston O.D. 3.514"
Piston Stroke 3.346"
Piston Weight 22.52 lbs.
Hole Sizes 4 5/8" - 5 1/8"
Air Pressure Consumption 150 psi - 350 psi
Wrench Size A/F 3.496"
Connection Std. 3 1/2" Remet

AIR CONSUMPTION CHART
PSI 100 150 200 250 300 350 400
CFM - 225 330 400 510; 625 -

rc 400 brochure cover

Download RC400 Brochure




RC 475

5 1/8" | 5 1/4" | 5 3/8" | 5 1/2" | 5 3/4" | 6"



RC475 parts breakdown
RC475 Component Parts
No. Description Part No.
1 Back Head 475020
2 NRV Seal R400019
3 NRV R400018
4 NRV Spring R400017
5 Make Up Steel 475016
6 Make Up Rubber 475015
7 NRV Housing 475014
8 Sample Tube Top R400012
9 O-ring -
10 Sample Tube Bottom R400013
11 Air Distributor Inner O-ring -
12 Air Distributor 475011
13 Air Distributor Outer O-ring (2) -
14 Piston 475009
15 Inner Sleeve Cylinder 475008
16 Bit Bearing Bushing 475007
17 Wear Sleeve 475006
18 Bit Retaining Ring O-ring -
19 Bit Retaining Ring 475004
20 5 1/2" Locking Shroud 512475SHROUD
20 5 1/4" Locking Shroud 514475SHROUD
20 5 1/8" Locking Shroud 518475SHROUD
20 5 3/8" Locking Shroud 538475SHROUD
20 5 3/4" Locking Shroud 534475SHROUD
20 6" Locking Shroud 6475SHROUD
20 Shroud Locking Key (2) R400003
21 Chuck w/Lock 475001
- O-Ring Kit 475005

HAMMER SPECIFICATIONS
Length (w/o drill bit) 45.622"
Outside Diameter 4.748"
Weight (w/o bit) 143.44 lbs.
Cylinder Bore 3.775"
Piston O.D. 3.769"
Piston Stroke 3.346"
Piston Weight 27.2 lbs.
Hole Sizes 5 1/8" - 5 3/4"
Air Pressure Consumption 150 psi - 350 psi
Wrench Size A/F 3.496"
Connection Std. 4 1/2" Remet

AIR CONSUMPTION CHART
PSI 100 150 200 250 300 350 400
CFM - 325 430 500 610; 725 -

rc 475 brochure cover

Download RC475 Brochure




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Missile LX RC Hammer Breakdown




RC Bits

We carry a large inventory of RC bits for convenient and quick delivery. Standard bits come with higher grade carbides for longer, harder drilling performance.  Diamond buttons are available by special order on all bits. Economize the diamond button cost even more by reclaiming the used diamonds (if in good shape) and have them reinserted in to a new bit body.   Please contact us for additional details.

RC Bit
RC Bit
RC Bit