| Bolt Diameter (mm) | Recommended Torque (Nm) | |
|---|---|---|
| Class 8.8 | Class 10.9 | |
| 10 | 55 | 75 |
| 12 | 100 | 135 |
| 14 | 160 | 215 |
What is the recommended maximum torque for your bolt?
Typical maximum recommended thightening torques for metric bolts
- coarse threaded
- lightly oiled threads
- tension 85% of proof load
- Bolt Torque Calculator
- US Bolts - Tightening Torques
How to measure the torque on bolts?
The torque value of a bolt can be checked in 3 ways:
- The movement check:
- The loosening check:
- The marking check:
What is the appropriate torque for lug bolts?
• Lug nuts should be torqued to 110-120 ft/lbs on all units except for the Cambridge, which requires 140-150 ft/lbs. This is due to the use of a 9/16” stud versus a half inch stud used on other units.
What is the torque spec. on crankshaft pulley bolt?
The higher torque spec only applies if you use a new crankshaft/bolt, I'm guessing it's to stretch the bolt initially. If you're reusing the bolt/crank, just follow what they recommend. 36lb/ft + 90*
What is the torque for a 10 mm bolt?
We recommend you use torque values specified below: For bolts with a 6mm Thread Diameter: 20Nm. For bolts with a 8mm Thread Diameter: 22Nm. For bolts with a 10mm Thread Diameter: 25Nm.
What is the torque setting for the Bolts?
US Recommended Bolt TorqueSizeRecommended TorqueGrade 2Grade 85/8"731803/4"1253157/8"12950113 more rows
What is the torque spec for a M6 bolt?
Torque SpecificationsSizeMinMaxM4435.8M58311.4M614419.8M834547.345 more rows
How do you determine torque for tightening bolts?
The basic formula T = K x D x P stated earlier takes these factors into account and provides users with a starting point for establishing an initial target tightening torque.
What happens if you over torque a bolt?
Typically, an under torqued bolt will deform and be unable to provide as much clamping force as needed. An over torqued bolt will break.
What are the torque specifications?
By definition, torque refers to the amount of rotational force at the point of application. When attaching a wheel to a vehicle, torque specifications are the amount of force recommended on the hardware to ensure proper installation.
What does 10.9 mean on a bolt?
Bolt Grade Markings and Strength ChartGrade and MaterialMechanical PropertiesMin. Tensile Strength (psi)Class 8.8 Medium carbon steel, quenched and tempered830Class 10.9 Alloy steel, quenched and tempered1040Class 12.9 Alloy steel, quenched and tempered122018 more rows
How much weight can a M12 bolt hold?
SizeGrade 8.8Grade 10.9M82,120kg3,040kgM103,370kg4,810kgM124,890kg7,000kgM169,100kg13,000kg5 more rows
How do I calculate torque?
To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.
How do you measure torque on a bolt without a torque wrench?
0:562:45How to torque without a torque wrench - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou could use a luggage scale if you wanted to but anything that's going to show you exactly howMoreYou could use a luggage scale if you wanted to but anything that's going to show you exactly how much force you're exerting.
What does 10.9 mean on a bolt?
Bolt Grade Markings and Strength ChartGrade and MaterialMechanical PropertiesMin. Tensile Strength (psi)Class 8.8 Medium carbon steel, quenched and tempered830Class 10.9 Alloy steel, quenched and tempered1040Class 12.9 Alloy steel, quenched and tempered122018 more rows
How tight is hand tight torque?
What is hand tight torque value? The hand tight torque value is the amount of torque required to turn a fastener by hand. This value is typically between 0.03 and 0.05 Nm for most applications.
What does 8.8 mean on a bolt?
So, in English, a Property Class 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of that nominal tensile strength, so 640 MPa.
What is the torque spec for a 10.9 bolt?
Metric Recommended Bolt TorqueBolt Diameter (mm)Recommended Torque (Nm)Class 8.8Class 10.983040105575121001355 more rows
How much torque is used for bolt tension?
Bolt torque provides only an indirect approximation of material stress. It is estimated that only about 10% of the tightening torque actually results in useful bolt tensioning. The remaining 90% is lost due various forms of friction that occur during the tightening process.
What is bolt proof load?
Bolt proof load is defined as the maximum force that the material can support without experiencing permanent deformation. Although material properties vary, an approximate estimate of proof strength is 85% - 90% of its yield strength.
What is a s in a bolt?
A s = Bolt Thread Tensile Stress Area (in 2)
Why is it important to test actual fastener components?
Testing of actual fastener components is recommended to determine appropriate torque values for all critical-use applications.
What is the objective of engaging threads?
The objective is to assure that the engaging threads will not strip under the loading that the bolt is able to apply.
What is the rule of thumb for threads?
A common rule-of-thumb is to provide a minimum length of thread engagement equal to the (major) diameter of the fastener.
Does increasing the strength of a bolt increase the clamping capability of the bolt?
If the nut material is the limiting factor in the fastening system, then obviously increasing the material strength of the bolt will have no effect on increasing the clamping capability of the assembly.
Engineering ToolBox - SketchUp Extension - Online 3D modeling!
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!.
Privacy
We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.
Advertise in the ToolBox
If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. You can target the Engineering ToolBox by using AdWords Managed Placements.
Citation
Engineering ToolBox, (2018). Metric Bolts - Tightening Torques. [online] Available at: https://www.engineeringtoolbox.com/metric-bolts-maximum-torque-d_2054.html [Accessed Day Mo. Year].
What should the torque coefficient be before bolt construction?
Before high-strength bolt construction, the torque coefficient of the high-strength bolt connection pair should be re-examined according to the factory batch. 8 sets of each batch should be re-examined. The average value of the torque coefficient of the 8 sets should be within the range of 0.110～0.150, and the standard deviation should be less than Or equal to 0.010. After the test, the high-strength bolts should be installed in a short time.
What is TorcStark hydraulics?
TorcStark® is a professional manufacturer of hydraulic equipment. Mainly produce hydraulic torque wrenches, hydraulic bolt tensioners and hydraulic torque/tensioner pumps. Fill out the form below and tell us your questions and needs. We will contact you within 2 hours.
What is the nominal tensile strength of 8.8 bolts?
The nominal tensile strength of 8.8 performance grade of M20 bolts is σb=800MPa, and the minimum tensile strength σb=830MPa. Nominal yield strength σs=640, minimum yield strength σs=660
What does the number before the decimal point mean?
There is another explanation. The number before the decimal point indicates the tensile strength after heat treatment. The number after the decimal point represents the yield ratio, that is, the ratio of the measured value of the yield strength to the measured value of the ultimate tensile strength. Grade 8.8 means that the tensile strength of the bolt rod is not less than 800 MPa, and the yield ratio is 0.8. Grade 10.9 means that the tensile strength of the bolt rod is not less than 1000 MPa, and the yield ratio is 0.9.
What is the K in a torque test?
K is the torque coefficient, you can refer to the manufacturer’s test report and on-site retest report,
What is a high strength bolt?
High-strength bolts refer to bolts with relatively strong grade hardness performance, also called high-strength bolts. Generally refers to 8.8 or above, such as 10.9 grade bolts and 12.9 grade bolts, which have strong hardness and torsion resistance.
What is the effective cross sectional area of M20?
The effective diameter of M20 is Φ17, the effective cross-sectional area is 227 square millimeters , and the minimum tensile strength of M20 of class 8.8 is σb=830MPa.
