Home Extension bar Socket extension bar 3/4 inch drive ELORA 770S for truck repair

Extension bar

Socket extension bar 3/4 inch drive ELORA 770S for truck repair

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Sold: 27

Imported from: Germany

Origin: Made in Germany

Reaching bolts recessed behind ribs and flanges calls for a 3/4 inch drive extension bar. The ELORA 770S family covers lengths from 100 to 400 mm. Each bar carries a 3/4 inch female square at one end and a male square drive at the other. Bodies are machined from hardened Chrome-Vanadium steel 31CrV3 / 1.2208. Bars can be coupled in series for extra reach.

SKU: 770S

3 variants

€31.06 - €54.48

Stock status: Varies by SKU

Indicative price

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Description

The 3/4 inch drive extension bar ELORA 770S widens the working range of a 3/4 inch socket set. The series is offered in several lengths, from 100 mm up to 400 mm. A technician can therefore match the bar to the real depth of the joint. The bar sits between the ratchet and the socket. That spacing moves the hand out of tight pockets and away from hot parts.

Each bar is machined from ELORA Chrome-Vanadium steel 31CrV3 / 1.2208. This alloy group is widely used for hand tools that carry torsional load. One end forms a 3/4 inch female square, the opposite end a 3/4 inch male square. With this layout, two or more bars can be joined for deeper access. The unit of sale is the piece, so single lengths can be ordered as needed.

Technical features of the 3/4 inch drive extension bar ELORA 770S

Construction and material

The alloy steel blank is hardened before the square ends are finished. The surface treatment limits corrosion in normal workshop conditions. A detent groove on the male square holds the socket when the assembly is pulled back from the joint. The female square accepts ratchets, breaker bars and torque wrenches of the same drive size.

3/4 inch square drive at both ends: one female socket, one male spigot
Material: ELORA Chrome-Vanadium steel 31CrV3 / 1.2208
Solid round body, hardened, built for torque on large bolts
Ball-detent groove on the male square retains the socket
Several bars can be coupled in series for extra reach

Keep the axis of the bar in line with the bolt centre while tightening. Off-axis loading concentrates stress on the square drive and on the socket walls. For seized or heavily torqued fasteners, use the shortest bar that still reaches. Longer bars store more torsional deflection, which reduces feel and increases the spread of applied torque.

Compatibility within the tool set

The 770S bars belong to the ELORA 3/4 inch drive system. That system serves large threaded joints on trucks, construction machinery and steel structures. The bars mate directly with standard sockets, deep sockets, hand impact sockets and universal joints of the same drive size. Length choice depends on the depth of the housing, flange or wheel recess.

Works with 3/4 inch ratchets, T-handles and torque wrenches
Combines with a universal joint for angled fasteners
Accepts standard and deep sockets of the same drive
Sold per piece, individual lengths available

A practical set holds at least two different lengths. One short bar covers shallow joints, one long bar reaches recessed positions. This pairing reduces the need to stack several bars. After use, wipe oil, grease and metal dust from both squares. A contaminated drive spigot is harder to fit and accelerates wear of the socket bore.

Common applications

Extension bars in the 3/4 inch class support high-torque work. Truck repair shops use them on wheel nuts and leaf spring fasteners. In machine shops, the bars reach flange bolts sunk between casting ribs. Maintenance teams fit them when removing pumps, gearboxes and shaft couplings. Steel erection crews use them to tighten bolts inside narrow gaps between members.

Selecting the right length

Measure the distance from the bolt face to a comfortable hand position. Subtract the socket height to obtain the required bar length. The 100 mm bar suits joints that are only slightly recessed. Longer versions cover deep cavities and sunken flanges. The variant table on this page lists every size with its order code.

Specifications

Function: extends reach between ratchet and socket
Drive: 3/4 inch square, both ends
One end female square, opposite end male spigot
Material: Chrome-Vanadium steel 31CrV3 / 1.2208
Solid round body, hardened before finishing squares
Ball-detent groove on male square retains socket
Female square accepts ratchets, breaker bars, torque wrenches
Bars couple in series for deeper access
Compatible with standard, deep and hand impact sockets
Combines with universal joint for angled fasteners
Surface treatment resists corrosion in workshop conditions
Built for high-torque work on large threaded joints
Applications: truck wheel nuts, leaf spring fasteners
Applications: recessed flange bolts between casting ribs
Applications: pumps, gearboxes, shaft couplings, steel structures
Sold per piece

Tags / Keywords: socket extension bar , 3/4 inch drive extension bar , extension bar for impact sockets , 3/4 inch socket accessories , ratchet extension bar , truck wheel nut tools , torque wrench extension , chrome vanadium extension bar , heavy duty socket tools , machinery maintenance hand tools

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