Mincon MR116-LA RC Hammer (4″ Remet)

The MR range of RC hammers is designed to perform at the top end of the performance scale compared to other tools on the market. With extensive testing over an 18 months period the MR range of tools offers some very significant benefits over it’s predecessor, the MX range of RC hammers.

Performance improvements show up to 20% increase in production in both grade control and exploration applications vs. the Mincon MX range. As with all Mincon hammers the tools performed extremely well in deep hole drilling in dry applications and where there is a lot of water in the bore hole. With a variable length available on the chuck sleeve the hammer can be easily set up for either dry or wet hole drilling. Set to become the standard by which RC hammers will be measured, the Mincon MR range of tools get the job done.

Key Features and Benefits

  • Patented mounting system for fixed internal components.
  • An extremely sturdy shank with a short length allows for greater transfer of energy between the piston and bit.
  • Variable chuck sleeve lengths for varying drilling conditions.
  • Single piece sample tube assembly.
  • Specially heat treated sample tubes offer superior wear resistance vs. our competitors.
  • Variable sample tube bore sizes allows the contractor greater flexibility in setting up his tool.
  • Hardened wear sleeve for optimum wear resistance even in the most abrasive conditions.
  • Multi-start threads on backhead and chuck ensure easy coupling/uncoupling of hammer.
  • Metal sprayed chuck sleeve and wear sleeve options for greater wear resistance on outside circulation.
  • All critical internal components are heat treated under strict control to maximize tool longevity.
  • Ease of service with no special assembly or disassembly tools required.

For more information:

+40 314 253 800

Ron van Dam

Hammer Outside Diameter116mm4.57″
Hammer Length (Less Drill Bit)1143mm45.0″
Backhead Spanner Flat Size94mm4″
Drill Bit Shank TypeMR116
Backhead Thread4″ Remet
Drill Bit Size Range121mm – 127mm4.75″ – 5″
Hammer Weight (Less Bit)65 Kgs143 Lbs
Maximum Drill Bit Weight14 Kgs30.9 Lbs
Piston Weight14 Kgs30.9 Lbs
Make up Torque4650-6237 NM3430-4600 FT Lbs
Backhead Stand Off0.75mm0.030″
Recommended Minimum Air Package25.5m3/min @ 24.1Bar900cfm @ 350psi
ItemPart NumberDescription
MR116AL01MR116 Hammer 4 ” Remet – Low Air
11300-0780Internal Circlip
2BS 226O Ring x 2
3MX5053AT01Adaptor Tube 4 Remet
4BS 224O Ring x 2
5BS 040O Ring
7MR116BH01Back Head 4 Remet
8BS 241O Ring
98406-175Check Valve Seal
10MR120CV01Check Valve Plunger
11MR120SP01Check Valve Spring
13MX4550LR01Lock Ring
14MR116ST01Sample tube – Large Bore
MR116ST03Sample Tube – Small Bore
15BS 139O Ring
16MR116DSR02Sample Tube Mount – Low Air
17BS 233O Ring
18BS 040O Ring
19MR116SR01Seating Ring
20MR116IC01Inner Cylinder
22MR116WS01Wear Sleeve
23MR116PR01Piston Retain Ring
24MR116BB01Aligner Bearing Bush
25N7 88 X 4O Ring x 2
26BS 236O Ring
27MR116BR01Bit Ring
28BS 152O Ring
29MR116CSxxxLChuck Sleeve
MR116OKITO-ring service kit
MR116MK01Make up service kit
5116165C1MR116 Bit 165mm Collaring
5116190C1MR116 Bit 190mm Collaring

 Air Pressures are given for compressors operating at seal level at 20° C (68º F). Corrections to actual compressor volume should be made to account for temperature, altitude and relative humidity.

DTH hammers must receive a constant supply of proper rock drill oil to protect the internal components and to provide a good air seal between the hammer’s running surfaces for efficient drilling. Mincon recommends the use of Mincon Envirosafe® Rock Drill Oil (RDO) to maintain optimal performance and extend the life of the internal components. The correct consumption of oil is dependent upon the air volume and conditions. Please refer to the lubrication graph below for recommendations. When drilling in wet conditions the normal amount should be doubled. There should be visual evidence of oil around the drill bit shank and within the tube joints when changing tubes.

If using petroleum based rock drill oils, the recommended grade of oil is dependent on the ambient temperature and the operating pressure. As a rule of thumb, ISO320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool, however, where the pump cannot pump the oil in colder conditions, a lower grade of oil can be used as per the graph below.

DiameterFace TypePart NumberDescriptionNo. x Button Dia (inch)Sample holesWeight Approx.
1214 3/4Concave5116121C1MR116 4 3/4″ CC BIT8 * 5/86 * 9/164 * 1/221430.9
1214 3/4Drop Centre5116121D2MR116 4 3/4″ DEEP DC BIT8 * 5/84 * 9/162 * 9/1621430.9
1214 3/4Hard Formation5116121H1MR116 4 3/4″ HF BIT8 * 5/86 * 9/163 * 1/221430.9
1244 7/8Concave5116124C1MR116 4 7/8″ CC BIT8 * 5/86 * 9/164 * 1/221430.9
1244 7/8Drop Centre5116124D2MR116 4 7/8″ DEEP DC BIT8 * 5/84 * 9/162 * 9/1621430.9
1244 7/8Hard Formation5116124H1MR116 4 7/8″ HF BIT8 * 5/86 * 9/163 * 1/221430.9
1275Drop Centre5116127D2MR116 5″ DEEP DC BIT8 * 5/84 * 9/162 * 9/1621430.9
1275Hard Formation5116127H1MR116 5″ HF BIT8 * 5/86 * 9/163 * 1/221430.9
1305 1/8Drop Centre5116130D2MR116 5 1/8″ DEEP DC BIT8 * 5/84 * 9/162 * 9/1621430.9
1305 1/8Hard Formation5116130H1MR116 5 1/8″ HF BIT8 * 5/86 * 9/163 * 1/221430.9
1335 1/4Drop Centre5116133D2MR116 5 1/4″ DEEP DC BIT8 * 5/84 * 5/82 * 9/1621430.9
1335 1/4Hard Formation5116133H1MR116 5 1/4″ HF BIT8 * 5/86 * 5/83 * 1/221430.9
1656 1/2Drop Centre5116165C1MR116 6 1/2 COLLARING BIT8 * 5/88 * 5/84 * 9/1621737.5
1907 1/2Drop Centre5116190C1MR116 7 1/2 COLLARING BIT8 * 5/812 * 5/84 * 9/1621941.9