920 Flex Head Wrench - Features, Usage Tips and Maintenance

What is a 920 Flex Head?

A 920 flex head is a type of wrench attachment that allows the head to pivot and rotate to fit into tight spaces. Flex heads provide versatility and maneuverability that standard wrench heads cannot. The "920" refers to the opening size of the wrench head, which is 9/20ths of an inch or approximately 14mm. This makes a 920 flex head suitable for use on metric fasteners of that size.

Benefits of a 920 Flex Head

There are several key benefits that a 920 flex head provides over a standard fixed wrench head:

• Accessibility - The pivoting flex head can access hard to reach fasteners at angles that would be impossible with a straight fixed head.
• Adaptability - It can fit onto bolt heads, nuts, and fittings in tight confined areas where swinging a straight wrench would not work.
• Versatility - A flex head allows both tightening and loosening nuts/bolts without having to switch tools or direction unlike some adjustable wrenches.
• Comfort - The flexible neck reduces hand and wrist strain compared to straight fixed heads.
• Control - The pivoting action allows for more control and precision in applying torque/force.
• Speed - Flex heads are quicker to engage/disengage fasteners in awkward locations.

Types of 920 Flex Heads

There are a few main types of 920 flex head wrench attachments:

• Swivel Socket Adapter - A hex-shaped drive attaches directly to sockets allowing flex access. Best for frequent socket changes.
• Flex Extension Bar - A long flex hex drive that provides extra reach. Ideal for very deep or recessed bolts.
• Ratcheting Flex Handle - A ratcheting mechanism allows tightening/loosening without removal. Convenient for repetitive jobs.
• Low-Profile Flex Wrench - A thin flex head that fits into the tightest spots. Useful in confined spaces.
• Right Angle Flex Wrench - The head pivots 90 degrees for side access. Great for hard to reach angles.

Choosing the Right 920 Flex Head

Consider the following when choosing the best 920 flex head for your needs:

• Job application - What type of bolts/nuts will you be working on? This affects the style of head needed.
• Accessibility - How much maneuverability and what angles do you need to reach fasteners?
• Drive type - Does the flex head need to fit straight sockets, external hex, internal spline, etc?
• Handle style - Straight handle or ratcheting depending on your workload.
• Size/length - Longer flex heads provide extra reach. Shorter ones offer precision.
• Build quality - For frequent professional use, invest in high end brands for durability.
• Budget - Prices range widely based on design, materials and brand reputation.

Using a 920 Flex Head Wrench

Understanding proper usage techniques for your 920 flex head will allow you to take full advantage of its capabilities and avoid damage.

Engaging the Fastener

• Inspect the fastener head and determine the proper size 920 flex head needed.
• Align the flex head onto the nut/bolt head at the proper angle. The flexibility allows engaging at creative angles.
• Seat the flex head fully onto the fastener before applying torque.
• Position your hand to keep the flex head in place. The pivot ability can allow the head to disengage if not held steady.

Applying Torque

• For stuck bolts/nuts, gradually increase torque to break the fastener free.
• Avoid applying excessive torque quickly or forcing the flex head past its natural pivot angle as this can damage the head.
• Use your wrist, arm muscles and body position to apply leverage. Don't use the flex neck for leverage.
• If tightening very tight, repeatedly check torque wrench or hand tightness to avoid over tightening.

Clearing Obstacles

• Use the flex capability to pivot the head around obstructions blocking a straight on approach.
• For recessed bolts, pivot to engage the fastener at the optimal angle then realign the handle for turning clearance.
• Flex heads allow engaging at angles parallel, perpendicular or offset to the axis of the threaded rod or fastener.
• Caution top or side loading the flex head as this can damage internal parts.

Passing Obstacles

• The flex head design allows "snaking" around obstructions to reach the nut/bolt.
• Slowly pivot head into position past the obstacle using as much of the available pivot range as necessary.
• Many flex heads can pivot twice - both forward and backward from the center axis.
• Go slow and carefully to avoid binding or damaging the internal pivot mechanism when passing obstacles.

Maintenance of a 920 Flex Head

Properly maintained flex head wrenches will deliver years of trouble free bolting/fastening service.

Cleaning

• Wipe down the tool to remove any dust, dirt or grime on the head or handle.
• Remove any rust build up with a wire brush or steel wool.
• Clean gear teeth, joints and swivel areas to remove debris.
• Rinse, wash and thoroughly dry if very dirty to remove any contaminating material.

Lubricating

• Periodically lubricate pivot points and joints with a light machine oil or dry Teflon lubricant spray.
• Avoid getting oil/grease on handle grips or they will become slippery.
• Move the head through its full range of motion to work lubricant into the internal parts.
• Wipe away any excess lubricant. Too much can attract contaminating dirt/debris.

Inspection

• Inspect for any cracked, chipped or damaged parts like jaws, head, neck or handle.
• Replace any unserviceable parts. Don't take chances with damaged tools.
• Check for any looseness or excessive play in pivot joints.
• Adjust or tighten retention nuts/screws as needed to restore tight precision head positioning.

Storage

• Store in a clean, dry space away from moisture and temperature extremes.
• Hang large wrenches vertically or keep smaller versions in a toolbox drawer compartment.
• Avoid resting very heavy objects on top of the tool while being stored.
• Line drawer compartments with anti-slip padding to keep tools from sliding around and hitting each other.

Proper care will ensure your 920 flex head wrench provides maximum effectiveness and longevity. Always inspect before each use for any damage or wear issues.

FAQs

What are the main benefits of a 920 flex head wrench?

The key benefits are accessibility to hard to reach fasteners, adaptability to fit different bolts/nuts, versatility for tightening and loosening, more comfort and control than fixed heads, and speed of engagement in tight spots.

What types of jobs is a 920 flex head wrench best suited for?

It excels at any tasks requiring frequent adjustment of angles and orientation to engage awkward, recessed or obstructed nuts, bolts, fittings etc. Typical uses include automotive repair, plumbing, HVAC work, machinery maintenance and construction.

How can I avoid damaging a 920 flex head?

Don't force the head past its natural pivot range or try to use the neck as a leverage point. Ensure the head is fully engaged before applying high torque. Don't top or side load the head. Use slow controlled motion when maneuvering into position.

How often should a 920 flex head be lubricated?

A light lubrication once a month or every 25 hours of use will keep the pivot action smooth. Use a machine oil or dry Teflon lube. Wipe away any excess when done.

What are signs my 920 flex head needs replacement?

Look for cracks, chips or damage to the head, neck or handle. Also check for excessive looseness or play indicating worn out pivot joints. Any issues that compromise integrity require replacement.