Stationary applications type
Rockwell Indentation
Hot Hardness Load Cell
Required Tools and Components
Components:
- Instrument - verified through direct and indirect verification - should be used.
- Indenter - verified through indirect verification - should be placed in the indenter holder
- Permanently embedded or with removable ball type indenters can be used. Requirements of A3.4.4 part of ASTM E18 should be met.
- Standard Ball Holders:
- Universal Ball Holder:
- High Temperature Rockwell Indenters:
- Indenter Holder (Necessary to support ball holders): AM000198-00
- 1/16” Ball Holder: SPN030236-263
- 1/8” Ball Holder: SPN030236-262
- 1/16” Ball Holder: MM001918-02
- 1/8” Ball Holder: MM001919-02
Rtec Indenters:
For use up to 1000°C:
For use up to 1200°C (Ceramic holder with permanently embedded ball):
- Ball - compliant with E18 requirements - should be used.
- Balls may be reused as long as they remain within the dimensional and surface-condition requirements of A3.4.3 part of ASTM E18 (randomly testing balls in a batch is considered sufficient)
Rtec Rockwell WC Balls:
Geometrical specifications within ASTM E18 requirements. No certificate provided.
1/16” WC Ball: BM110015
1/8” WC Ball: BM110058
1/4” WC Ball: BM110017
1/2” WC Ball: BM110018
- Sphero-conical diamond tip - compliant with E18 requirements - should be used.
- Basic Diamond Indenter: SPN13065
- Diamond tip within ASTM E18 specifications. No certificate provided.
- Rockwell Certified Diamond Indenter: SPN13063-317 A
- Diamond tip within ASTM E18 specifications. Diamond certificate provided.
- Rockwell ECR Certified Diamond Indenter: SPN13064-323
- Used for Electrical Contact Resistance measurements. Diamond tip within ASTM E18 specifications. Diamond certificate provided.
Rtec Diamond Tips:
- Sample - compliant with E18 requirements - should be placed below the indenter.
- Requirements of table A4.1 of ASTM E18 should be met.
- Universal holder
- Fz-1D Load Cell
Screws and Hardware:
- (4x) 1.125 in Screws and Washers
- Allen wrenches: 5/64", 3/16”
Mounting the Fz Load Cell with the indentation holder
- Quick-exchange attachement
- Sliding plate
- Block extension
- Fz load cell
Ensure that the quick-exchange plate is properly mounted on top of the load cell:
- Mount the fz load cell on the fast exchange plate and tighten the 4 captive screws.
(4 x 10-32 x 1.250” long using 5/32 Allen wrench).
Incorrect
- The fast exchange plate’s notch should be pointing on the opposite side of the front load cell as this notch will fit into the back of the sliding support.
- The front of the load cell is the face showing the Rtec logo and the unit calibration sticker.
(Optional) With Extension blocks:
You can also use an extension block to reduce the distance between the load cell and the lower setup.
- Mount the block extension on the exchange plate with 4 4 x 10-32 x 1.250” long screws using 5/32 Allen wrench.
- Install the load cell mounted on the extension block with the 4 captives screws.
(4 x 10-32 x 1.250” long using 5/32 Allen wrench).
- The fast exchange plate’s notch should be pointing on the opposite side of the front load cell as this notch will fit into the back of the sliding support.
- The component at the top of the picture is the fast exchange adapter.
- The front of the load cell is the face showing the Rtec logo and the unit calibration sticker.
Incorrect
Install the Fz load Cell
- Lower the Z-Axis all the way down using the jogbox Z-axis control.
- Slide the FZ-1D arm into the quick-exchange mount.
- Secure the arm by locking it in place.
Always power off the instrument before connecting or installing any load cell
or accessory.
or accessory.
Attach the Load Cell Cables
- Connect the Sensor Cable
- Raise the Fz-1D Load Cel
Maintenance {{if rock}}
Rockwell Hardness Tester
The following verification types should be performed based on the following schedule, based on ASTM E18-15:
- Direct Verification:
- After installing a new Instrument
- When Adjustments, modifications or repairs affecting the force, depth or machine hysteresis are made.
- When the instrument fails an indirect verification
- Indirect Verification:
- Recommended every 12 months or sooner.
- Installed or moved instrument.
- Following a direct verification.
- To qualify an indenter.
Direct Verification
- Verification of Test Forces
- Verifying the test forces using an external force gauge
- Class A, 0.25% accuracy. Mark-10 Series 5 and up are suitable.
- 3 Measurements at each load compared to tolerances (in ASTM E18 Table A1.2)
- All measurements should be within tolerances.
- Highest - Lowest values should be within 75% of the tolerance range.
- Verification of Depth
- Verified 4 evenly spaced increments covering the full working depth range with a device with an accuracy ≤ 0.0002 mm.
- Regular Rockwell Hardness: Depth measurement within ± 0.001 mm
- Superficial Rockwell Hardness: Depth measurement within ± 0.0005 mm
- Verification of Hysteresis
- Perform 5-10 tests with a blunt indenter or indenter holder. Average the last three tests
- HRB, HRE, HRF, HRG, HRH, HRK: Hardness should be 130 ± 1.1
- Other Rockwell scales: Hardness should be 100 ± 1.1
- Verification of Testing Cycle:
- The instrument should meet the following tolerances (Tolerances in ASTM E18 Table 3):
- Dwell time for preliminary force tPF: 0.1 to 4.0s
- Time for application of additional force tTA: 1.0 to 8.0s
- Dwell time for total force tTF: 2.0 to 6.0s
- Dwell time for elastic recovery tR: 0.2 to 5.0s
- Recommendation only: Indenter contact velocity vA: below 2.5 mm/s
Indirect Verification
Indirect verification certifies only the Rockwell scales and indenters which have passed the verification.
- One standardized test block needs to be tested from each for the hardness ranges in ASTM E18, Table A1.3.
- Standardized test block should meet the physical requirements of standardized test blocks in ASTM E18, Table A4.1.
- 5 Measurements per block. Determine the error and repeatability and ensure that they are within tolerances of the Rockwell scale in Table A1.3 of ASTM E18:
- Error: H.max - H.min
- Repeatability: H.average - H.standard
If the system cannot pass the indirect verification, it is recommended to clean the system and verify the surfaces conditions. You can also change the indenter to verify the failure origin.
If you cannot determine the origin, please contact Rtec-Instruments or your local representative office.
Contact & Support
For technical support or further assistance, please contact:
Rtec-Instruments Support
support@rtec-instruments.com
+1 (408) 708-9226
Manual Versions
Manual Version | Date | Update Description |
ㅤ | ㅤ | Initial Manual Version |
