What is the torque on a 8.8 bolt?
Metric Recommended Bolt Torque
| Bolt Diameter (mm) | Recommended Torque (Nm) | |
|---|---|---|
| Class 8.8 | Class 10.9 | |
| 8 | 30 | 40 |
| 10 | 55 | 75 |
| 12 | 100 | 135 |
How much torque can a Grade 8 bolt take?
US Recommended Bolt Torque
| Size | Recommended Torque | |
|---|---|---|
| Grade 2 | Grade 8 | |
| 7/8″ | 129 | 454 |
| 1″† | 188 | 682 |
| * Sizes from #4 to #10 are in lb-in. Sizes from 1/4″ up are in lb-ft. † Fine thread figures are for 1″-14. Grade 2, 5, and 8 values are for slightly lubricated bolts. |
What is the torque on a 8mm bolt?
22Nm
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 value in NM for 20mm bolt 8.8 grade?
Classic 8.8 Bolts (Metric Coarse)
| Bolt Diameter x Pitch | Thread Stress Area mm 2 | *When μ = 0.10 Results in: |
|---|---|---|
| Tightening Torque Nm | ||
| M16 x 2 | 157 | 180 |
| M18 x 2.5 | 192 | 259 |
| M20 x 2.5 | 245 | 363 |
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 is Max locking torque?
So, the maximum locking (prevailing) torque going into the bolt is measured, as is the minimum torque required to remove the bolt. Semantically speaking, the torque value table measures the maximum torque for installation, and the minimum torque for removal.
What happens if you over torque a bolt?
What happens when you over torque a bolt? – YouTube
How do you determine tight torque?
DETERMINING TORQUE
The general equation for bolt load based on applied torque is T = KFiDb where K = torque coefficient. K is a function of the coefficients of friction and collar friction in the joint, and these are based on variables such as surface finish, coatings, and so on.
Is a 10.9 bolt stronger than Grade 8?
Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications.
What does 10.9 mean on a bolt?
Bolt Grade Markings and Strength Chart
| Grade and Material | Mechanical Properties |
|---|---|
| Min. Tensile Strength (psi) | |
| Class 8.8 Medium carbon steel, quenched and tempered | 830 |
| Class 10.9 Alloy steel, quenched and tempered | 1040 |
| Class 12.9 Alloy steel, quenched and tempered | 1220 |
How do I find torque specs?
The torque specs for the axle nut (and other nuts and bolts) should be listed in the dealership/shop guide provided by the manufacturer. If you can’t find that information, or if you don’t have a guide, you can find the specs in the service manual.
How is torque value calculated?
Does thread pitch affect torque?
Thread pitch tends to be more independent of nominal diameter than the other variables. Increasing just thread pitch by 40% cuts tension 5% for a given torque.
How much torque do I need?
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.
Does Grease affect torque?
Lubricants ease the amount of torque required to get the bolt properly tight, so you use your energy more efficiently.
How much torque does a 1/2 inch bolt have?
ASTM A449 / SAE Grade 5*
| Bolt Size | TPI | Tightening Torque (ft lbs) |
|---|---|---|
| Plain | ||
| 7⁄16 | 14 | 49 |
| 1⁄2 | 13 | 75 |
| 9⁄16 | 12 | 109 |
Is it better to over torque or under torque?
They’re all tools designed to both fasten properly and to prevent over-tightening or under-tightening a bolt. Over-tightening can cause damage to the fastener, and under-tightening can result in making the item you are attaching or assembling structurally weak and potentially unsafe for use.
How many times should you click a torque wrench?
One click is enough
When you’re tightening a bolt, one click is enough. Many users allow their wrenches to click more than once, but this means they’re applying added torque to the bolts. Use your tool in a smooth, steady fashion and let it click just once.
How do you measure torque on a bolt without a torque wrench?
How to torque without a torque wrench – YouTube
How much torque is needed to tighten a bolt?
The first factor is the bolt’s diameter. It takes more force to tighten a 3/4-10 bolt than to tighten a 318-16 bolt because it is larger in diameter.
…
What is the Proper Torque to Use on a Given Bolt. by Joe Greenslade.
| Product: 3/4-10 Grade 5 zinc plated bolt | |
|---|---|
| • K= | 0.22 (zinc plated) |
| • D= | .750 (3/4-10 nominal diameter |
Which is stronger 8.8 or Grade 5?
Table 1.
| Grade/Class | Strength |
|---|---|
| Grade 5 | Medium strength. |
| Grade 8 | High strength. |
| Metric Class 4 | Similar to Grade 2. |
| Metric Class 8.8 | Similar to Grade 5. |
What’s the strongest grade bolt?
grade 8
Grade 9 Bolts
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.
Is a 12.9 bolt stronger than Grade 8?
Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.
How do you manually measure torque?
Mark the tightened fastener and surrounding application. In the tightening direction, begin to slowly apply force to the tool until the first movement in the fastener is noted. The reading recorded is a good indication of the original torque applied to the joint. This is the best way to determine residual torque.