Mincon MR92 RC Hammer (3.5″ 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 Diameter92mm3.62″
Hammer Length (Less Drill Bit)1146mm45.1″
Backhead Spanner Flat Size76mm3″
Drill Bit Shank TypeMR92
Backhead Thread3.5″ Remet
Drill Bit Size Range102mm – 115mm4″ – 4.5″
Hammer Weight (Less Bit)47 Kgs103 Lbs
Maximum Drill Bit Weight11 Kgs24.4 Lbs
Piston Weight12 Kgs26.4 Lbs
Make up Torque3687-4921 NM2720-3630 FT Lbs
Backhead Stand Off0.75mm0.030″
Recommended Minimum Air Package25.5m3/min @ 24.1Bar900cfm @ 350psi
Item #Part NumberDescription
MR92AS01Mincon MR92 (3.5″ Remet)
11300-0700Internal Circlip
2BS 132O Ring x 2
3MX4044AT01Adaptor Tube 3.5″ Remet
4BS 126O Ring x 2
5BS 036O Ring
7MX4044BH01Backhead 3.5″ Remet
8BS 233O Ring
98405-137Check Valve Seal
10MX4044SCV01Check Valve Plunger
11MX4044SP04Check Valve Spring
12MX4044SM01Steel Make Up Ring
13MX4044LR01Lock Ring
14MX4044TT01Top Tube
15BS 126O Ring
17MX4044ST01Sample Tube
18BS 128O Ring
19MX4044DR01Sample Tube Mount
20BS 138O Ring
21BS 036O Ring
22MX4044SR01Seating Ring
23MX4044IC01Inner Cylinder
25MR92WS01Wear Sleeve
26MX4044PR01Piston Retaining Ring
27MR92BB01Aligner Bearing Bush
28BS 232O Ring x 2
29MR92BR01MR92 Bit Retaining Ring
30BS 139O Ring
31MR92CSxxxChuck Sleeve
32MR92CK01MR92 Chuck
MR92OKITMR92 O Ring Kit
MR92MK01MR92 Make Up Service Kit

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.
1024Drop Centre5092102D1MR92 4″ DC BIT8 * 1/24 * 1/22 * 1/227.817.2
1024Hard Formation509102H1MR92 4″ HF BIT8 * 1/24 * 1/22 * 1/227.817.2
1054 1/8Drop Centre5092105D1MR92 4 1/8″ DC BIT8 * 1/24 * 1/22 * 1/22817.6
1084 1/4Drop Centre5092108D1MR92 4 1/4″ DC BIT8 * 1/24 * 1/22 * 1/228.218.1
1144 1/2Drop Centre5092114D1MR92 4 1/2″ DC BIT8 * 9/164 * 9/162 * 1/228.619.0
1174 5/8Drop Centre5092117D1MR92 4 5/8″ DC BIT8 * 9/164 * 9/162 * 1/22919.8