Fork Arm

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Forklift Fork dimensions: Forklift forks, also known as tines or blades, are used to lift and carry loads. They are an integral part of the forklift and ensuring you are using the correct ones and that they are in good condition is essential to both the safety of personnel, but also the forklift and the load.

Fork Arm Wear Caliper

Contents

Forklift fork dimensions and specifications

Forklift blades: Horizontal part of the fork which lifts and supports the load
Tip: End of the blade that is inserted to the load
Shank: The vertical part of the fork
Heel: Part of the fork where the shank and blade meet
Hook: The hooks are the elements on the shank that support the forks on the forklift.
Pin lock (or locking pin, latch pin). Positioned on the top hook and used to position the forks on the forklift carriage. The forklift fork pin can be a latch or button (mushroom) type.
Taper: The difference in thickness between the tip and the heel. Tapers can begin at the heel or anywhere along the blade.

Fork.arm Fracture

Production standards for all forks are based on common key- features:
Innovative and highly automated production process.

Prime quality steel offering good welding characteristics and strong resistance to wear.
Automated welding of upper and lower hooks with a robotic system, granting the better quality of the welding, quality repeatability, and higher process speed.
Complete heat treatment with hardening and tempering on the entire fork, providing the best quality and reliability characteristics.

Standard forklift dimensions

General: Fork correct dimensioning and conditions are essential for safe, cost-effective and damage-free pallet handling operations. Therefore, a regular fork inspection system should be put in place to ensure perfect operating conditions. Inspections, repairs or replacements shall be carried out as a pair.
Height difference in fork tips: Check a pair of forks mounted on the fork carrier to detect a difference in tip heights. If the difference in tip heights exceeds 3% of the blade length, the pair of forks shall be withdrawn from service.
Wear: Forks must be checked regularly to ensure the heel thickness is not less than 10% of the original thickness as per ISO 5057. If the fork thickness is less that 10%, the fork must be replaced or rerated.

Forklift fork inspection

Inspections: Forks in use shall be inspected at intervals of 12 months or less depending on the possible severe application, multi-shift operation and fork conditions. Regular inspections should be carried out by trained personnel. In case of detected damage, failures, deformations, etc. forks shall be withdrawn from service and not be returned to service unless satisfactorily repaired or rerated.
Cracks: Check visually inner heel and top and bottom hook areas to detect possible cracks. Apply non-destructive crack detection tests if necessary. If surface cracks are detected, forks should be withdrawn from service.
Straightness: Check the straightness of the upper face of the blade and the front face of the shank. If the deviation exceeds 0,5% of blade length or shank height, fork shall be withdrawn from service.
Angle: Check the fork upper face of the blade to load the face of the shank. If the fork has a deviation greater than 3 degrees from original specifications, fork shall be withdrawn from service
Locking devices: Check the fork positioning locking to ensure their normal operation and wear conditions. If any fault is found, fork shall be withdrawn from service.
Marking: Forks shall be marked with the nominal capacity and load center according to ISO 2330. If marking is not clearly legible, fork shall be withdrawn from service.
Hooks: Check the fork hooks for possible wear, damage and cracks. If the clearance between fork and fork carrier is visually excessive, forks shall be withdrawn from service.

Fork Arm Wear Caliper Series 2

Replacement forklift forks

Repairs and tests: Repairs should be decided or carried out by authorized, expert personnel only, in accordance with recommendations of fork manufacturer. Do not repair surface cracks or wear them by welding. In case of repairs requiring fork re-setting, forks should be subjected to an appropriate heat-treatment. Fork subjected to repairs different from repairs or replacements of the positioning lock and/or marking can only return to service after having passed a yield test as described in ISO 2330.

Forklift pre shift inspection

The best way to inspect forks is to use a fork caliper.

Determine the nominal thickness of “N” of the fork. Measurement has to be done on the fork shank using the caliper ruler.
Position the caliper at the end of the heel internal radius with the opening corresponding to the nominal dimension “N” (eg. for N 45 use 45 mm thickness), where the wear is higher.
If the fork enters the opening, it is mandatory to replace it. DANGER OF BREAKING. Furthermore, a 10% reduction in fork blade thickness results in a 20% reduction in operating capacity

Types of forklift forks

Following is a list of some of the special types of forklift forks, used for specific applications.

Pin Type & Bar Type: the forks have a guide and are attached to a shaft. Found on larger lift trucks and construction machines such as some telehandlers. Pin-Types can come with a lower hook
Drum handling forks: these forks have a section cut out of the side of the forks to enable a drum to be lifted
Coil handling forks: the inside edge of the forks are “chamfered” to provide a surface for the coil to sit on.
Explosion-proof: if the forklift is to be used in explosive environments then the forks are clad in stainless steel to prevent sparking. The stainless steel coating is typically 2mm thick
Forks for the food production industry: forklifts that are used in the food industry are typically clad in stainless steel as they are regularly washed down to maintain cleanliness.
Lumber forks: have a thin and wide blade for ease when inserting into loads

Lifting equipment

The lifting equipment on forklift trucks machines is characterized by robust and high-quality design and numerous options combined with excellent visibility. Forklift trucks can offer many different types of masts all of the clear view design. In combination with forks and/or attachments, it can provide the handling solution to meet your needs.

For even better handling, there are also a number of intelligent functions for forklift machines:

Pre-selected lifting height – the operator can simply find the right lifting height by means of 15 pre-selected lifting heights.
No chain slack – the chains are kept tensioned at all times, eliminating undesired movements of the forks or the attachment.
Vertical hold– the automatic tilt device ensures that the load is taken up and put down vertically to the loading surface.

Forklift Masts Types:

Single-stage mast forklift
2 stage mast forklift
Quad mast forklift

Telescope Fork Arm

What type of steel is used for forklift forks?

What type of steel is used for forklift forks?

They are made of different types of steel. Sometimes HSLA A572-50 (high strength low alloyed) steel, 1045-1060 heat-treated material, T1 heat-treated steel, and others.

What are the forklift forks used for?

The forks on a forklift are used to make direct contact with a load for transport. They are attached to the forklift carriage and are designed to carry a load from the bottom. Forklift forks come in all shapes and sizes. There is a wide variety of fork types available for various applications.

What is a quad mast forklift?

4-Stage – A quad or four-stage mast is designed for very high stacking. Quad masts allow for a shorter collapsed height when compared to a three-stage with equivalent MFH (maximum fork height).

What are the Forklift dimensions?
What size forklift should I get for my warehouse?

It is often a question asked by business owners and operation managers. Forklift Dimensions can be tricky and unique to every application. Virtually every forklift dimension could potentially impact an operation, and create a safety hazard if not specified correctly and carefully.

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Fork vs German

Comparing German and Fork Mounts

The MI-500, MI-750, and MI-1000 mounts are each available in a German equatorial and an equatorial fork configuration. The MI polar cone and base are identical in either configuration. The polar cone houses the bearing assembly, right ascension axis, drive gear, and DC servo motor. The rocker base supports the polar cone, and includes azimuth and altitude adjustments for polar alignment.

For a German mount, the declination assembly attaches to the top of the right ascension axis. For a fork mount, the fork arms and central hub attach to the top of the right ascension axis. A single mount can, in fact, be converted from a 'fork to German' or 'German to fork' configuration by adding the appropriate declination assembly

Each type of mount has distinct advantages and some limitations. Choosing the best design will depend on the type, weight, and dimensions of the telescope tube assembly.

Equatorial Fork

The equatorial fork mount is excellent at holding compact tube assemblies. Unlike the German mounting, a fork mount tracks objects continuously through the meridian, i.e. no German roll-over. These mounts are often used with Cassegrain optical systems. Generally, fork mounts provide easy access to the telescope focal plane, which is usually a short distance below the axis passing through the upper ends of the fork arms.

The MI equatorial fork mounts offer a minimum 'footprint' in the design of an observatory, with the added benefit of continuous tracking across the sky. Since fork mounts do not need the large counter-weights of the German mount, fork mounted instruments are usually more compact. Forks do use a small counter-weight on one fork arm to balance the declination gear drive on the opposing arm.

However, fork mounts have a smaller load capacity than the equivalent German mount, since the telescope tube is suspended far from the center of the mount column or pier. Also, fork mounts are machined for a specific arm separation, making them less versatile at handling a variety of telescope equipment. The short length of the fork arms does not accommodate the long tubes of refractors and Newtonian telescopes.

German Equatorial

The German equatorial design is a classic telescope mounting that is capable of handling a wide variety of optical tube assemblies. By simply changing the position of the counterweights, a variety of equipment can be easily attached to the mount.

Since the center of mass of the optical tube assembly is usually near the center of the supporting column or pier, a German mount can generally carry a heavier load than the equivalent fork mount. German equatorial mounts can handle the long tubes of refractors and Newtonian telescopes.

One disadvantage of the German design is the need to 'flip' the telescope tube when the object you are observing passes through the meridian. The telescope must be moved from one side of the pier to the other, often referred to as 'roll-over'. A related issue is that near the meridian one must be alert that no part of the telescope hits the pier or column.

Fork Arm Forklift

With its long declination axis and heavy counter-weights, a German mount has a large footprint, and the focal plane of the telescope can sometimes be in an awkward viewing position. Also, a German mount has effectively two coordinate systems: one on the east side of the pier and one on the west side. However, with good mount modeling, this problem can be minimized.

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