Mincon MR132 RC Hammer (4 1/2″ Metzke)

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 Diameter132mm5.2″
Hammer Length (Less Drill Bit)1165mm45.9″
Backhead Spanner Flat Size94mm4″
Drill Bit Shank TypeMR132
Backhead Thread4 1/2″ Remet
Drill Bit Size Range137mm – 146mm5.4″ – 5.75″
Hammer Weight (Less Bit)77 Kgs170 Lbs
Maximum Drill Bit Weight18 Kgs39.7 Lbs
Piston Weight19 Kgs41.9 Lb
Make up Torque5288-7050 NM3900-5200 FT Lbs
Backhead Stand Off0.75mm0.030″
Recommended Minimum Air Package25.5m3/min @ 24.1Bar900cfm @ 350psi
ItemPart NoDescription
MR132AS02MR132 Hammer 4 1/2″ Metzke
11300-0850Internal Circlip
2MX5456AT11Adaptor Tube 4 ½” Metzke Pin
3BS 226O Ring x 2
4BS 040O Ring
6MR132BH11Back Head 4 ½” Metzke
7BS 244O Ring
88406-0200-N8Check Valve Seal
9MX5456CV01Check Valve Plunger
10MX5456SP01Check Valve Spring
12MR132LR01Lock Ring
13MR132ST01Sample tube – Large Bore
MR132ST03Sample Tube – Small Bore
14BS230O Ring
15MR132DR01Sample Tube Mount
16BS228O Ring
17BS237O Ring x 2
18BS042O Ring
19MX5456SR01Seating Ring
20MR132IC01Inner Cylinder
22MR132WS01Wear Sleeve
23MX5456PR01Piston Retaining Ring
24MR132BB01Aligner Bearing Bush
25N7-102-4O Ring x 2
26BS 241O Ring
27MR132BR01Bit Ring
28BS 152O Ring
29MR132CSxxxLChuck Sleeve
MR132OKITO Ring Kit
MR132MK01Make 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.
1375 3/8Concave5132137C1MR132 5 3/8 CC BIT8 * 5/84 * 9/164 * 9/1621737.5
1375 3/8Drop Centre5132137D1MR132 5 3/8 DC BIT8 * 5/84 * 5/84 * 1/221737.5
1375 3/8Hard Formation5132137H1MR132 5 3/8 HF BIT8 * 5/86 * 5/84 * 9/1621737.5
1405 1/2Concave5132140C1MR132 5 1/2 CC BIT8 * 5/84 * 5/84 * 9/1621737.5
1405 1/2Drop Centre5132140D2MR132 5 1/2 DEEP DC BIT8 * 5/84 * 5/83 * 1/221737.5
1405 1/2Hard Formation5132140H1MR132 5 1/2 HF BIT8 * 5/86 * 5/84 * 1/221737.5
1435 5/8Drop Centre5132143D1MR132 5 5/8 DC BIT8 * 5/84 * 5/84 * 1/221737.5
1435 5/8Hard Formation5132143H1MR132 5 5/8 HF BIT8 * 5/86 * 5/84 * 1/221737.5
1465 3/4Concave5132146C1MR132 5 3/4 CC BIT8 * 5/84 * 5/84 * 9/1621737.5
1465 3/4Drop Centre5132146D1MR132 5 3/4 DC BIT8 * 5/84 * 5/84 * 1/221737.5
1465 3/4Hard Formation5132146H1MR132 5 3/4 HF BIT8 * 5/86 * 5/84 * 1/221737.5
1526Drop Centre5132152C1MR132 6″ COLLARING BIT8 * 5/86 * 9/164 * 1/221839.7
1656 1/2Drop Centre5132165C1MR132 6 1/2 COLLARING BIT8 * 5/88 * 5/84 * 9/1621941.9
1907 1/2Drop Centre5132190C1MR132 7 1/2 COLLARING BIT8 * 5/812 * 5/84 * 9/1622146.3