Black & Decker HT20 TYPE 2 hedge trimmer Parts

Yes. On the Black & Decker HT20 hedge trimmer, we use a light spray lubricant such as WD-40 to help clean the blades and leave a thin protective film after use. For longer-lasting rust prevention, a light machine oil film after cleaning works well (per the owner's manual).

Best practice for cleaning and protecting the blades

• Unplug the trimmer and make sure the trigger is released; blades can coast briefly after shutoff.
• Brush off sap, clippings, and debris from the cutter teeth.
• Wipe the blades with a rag dampened with mild soap and water; keep liquids out of the tool.
• Spray a light coat of WD-40 on the blades, then wipe off excess so it does not attract dirt.
• Apply a thin film of light machine oil for storage to help prevent rust.

What to avoid

Avoid	Why it matters
Heavy grease or thick oil	Holds grit and can reduce cutting performance
Soaking or hosing the tool	Liquid intrusion can damage electrical components
Using the trimmer near wet conditions	Increases shock risk and corrosion potential
Storing near fertilizers or garden chemicals	These accelerate metal corrosion

Why it matters

Clean, lightly protected blades cut cooler and cleaner, and they resist corrosion from sap, moisture, and chemical exposure. That helps your HT20 maintain its cutting capacity (up to 3/4 inch stems for HT20 models) and reduces premature wear.

Last updated: February 2026

Yes. You can sharpen a Black & Decker electric hedge trimmer like the HT20 by dressing small nicks and restoring the cutting edges with a fine-toothed file or sharpening stone; always unplug the cord first and keep your hands away from the blade. See the owner's manual for handling and safety details.

Safe sharpening basics (corded HT20)

• Unplug the hedge trimmer before you inspect, clean, or sharpen the blades.
• Wear gloves and eye protection; blades can be sharp even when the tool is off.
• Keep hands away from the cutter blade; never test sharpness with your fingers.
• If the cord is cut or damaged, unplug at the outlet immediately before inspecting.
• If the blade is bent or movement is affected, stop and have the trimmer repaired before using it.

How to touch up the blade

For the HT20, we recommend a light touch-up rather than aggressive grinding.

1. Unplug the trimmer and clean off sap and debris.
2. Inspect for nicks (often caused by hitting hard objects).
3. If a nick interferes with blade movement, use a fine-toothed file or sharpening stone to remove the burr and smooth the damaged spot.
4. Wipe the blades clean and apply a thin film of light machine oil to help prevent rust.

What to sharpen (and what not to)

Condition	What we do	What we avoid
Small nick that does not affect movement	Leave it alone	Over-filing the tooth
Nick that interferes with movement	File or stone the nick smooth	Power grinding that overheats metal
Bent blade, cracked housing, broken handle	Repair before use	Operating “to see if it works”

Why it matters

A properly maintained cutting edge reduces binding and helps the trimmer cut cleanly with less strain on the motor, cord, and switch. It also lowers the chance you will force the tool and lose control.

Last updated: February 2026

Yes. On the Black & Decker HT20 hedge trimmer, the cutter blades are serviceable, but blade replacement is a repair-level job because the blade set ties into the drive mechanism and safety guarding. Follow the disassembly and safety guidance in the HT20 owner's manual before attempting blade service.

Before you replace blades (safety and setup)

• Unplug the trimmer before servicing, cleaning, or removing jammed material.
• Keep hands away from the cutter blade; the blade can coast after you switch off.
• Inspect the hedge for foreign objects (wire, fences) before each use to prevent blade damage.
• Use both hands during operation; one-handed use can cause loss of control.
• Use the guard and bail handle properly assembled before operating.

Quick decision: sharpen, file a nick, or replace?

If the blades are only nicked from hitting something hard, you often do not need full replacement.

Blade condition	What to do	Typical result
Small nick, blades still move freely	Lightly dress the nick with a fine-toothed file or sharpening stone	Restores cutting without major teardown
Nick/burr interferes with blade movement	Unplug, remove the interference carefully, then recheck movement	Prevents binding and overheating
Bent blade, cracked housing, broken handle	Stop using the trimmer and have it repaired before reuse	Avoids unsafe operation
Severe wear, missing teeth, repeated jamming	Replace the blade set	Restores safe cutting performance

What blade replacement usually involves

Most corded electric hedge trimmers like the HT20 require these steps:

• Remove the guard/bail handle fasteners to access the housing (a Phillips screwdriver is commonly used).
• Separate the housing carefully and note how the blade set interfaces with the drive components.
• Inspect for damage from impacts (bent blade, debris in the blade track, worn drive parts).
• Install the replacement blade set, then reassemble and verify smooth blade travel by hand (with the unit unplugged).
• After cleaning, apply a light film of machine oil to help prevent rust.

Why it matters

A damaged or binding blade increases kickback risk, can cut the extension cord, and can overload the drive components. Correct blade service keeps cutting performance high and helps prevent unsafe handling.

Last updated: February 2026

Yes, repairing a hedge trimmer is usually worth it when the tool is otherwise in good shape and the issue is maintenance-related (dull blades, binding, cord damage, or a sticky switch). For the Black & DECKER HT20 hedge trimmer, safe operation and proper servicing are key; use the owner's manual to match the fix to the symptom.

When repair makes sense

Repair is the better choice when the trimmer is structurally sound and the problem is isolated.

• Blades are dull or binding but not bent or cracked
• The trimmer runs but cuts poorly (often blade sharpness or technique)
• You see minor wear, loose fasteners, or misalignment that can be corrected
• The cord is nicked or damaged (unplug first; repair before using again)
• The unit just needs cleaning and light oil to prevent rust

When replacement is the better value

If the trimmer has multiple safety-related issues, replacement is typically the smarter path.

• Cracked housing, broken handles, or obvious internal damage
• Repeated failures after prior repairs
• Severe blade damage (bent teeth, cracks) that affects control
• Any condition that makes the tool unsafe to operate with both hands

Quick decision guide

What you’re seeing	Most likely fix	Worth repairing?
Cuts slowly, snags, binds	Clean, sharpen, check alignment	Usually yes
Rust on blades	Clean and apply light machine oil	Usually yes
Cord damage	Repair/replace cord before use	Usually yes
Broken handle/housing	Structural repair	Usually no

Why it matters

A poorly maintained hedge trimmer is more likely to bind and is harder to control. Keeping cutting tools sharp and addressing misalignment, breakage, or cord hazards before use reduces the risk of injury and improves cut quality.

Last updated: February 2026