550X156 Bucket Tooth Adapter Weld On Shanks

1. Product Overview

The 550×156 Bucket Tooth Adapter System is a heavy-duty, high-performance Ground Engaging Tool (G.E.T.) designed for mini excavators, skid steer loaders, backhoes, and compact track loaders (CTLs).

2. Key Product Features & Benefits

• Precision 1.00″ Lip Fitment: Custom-contoured for 1″ (25.4 mm) loader and excavator bucket cutting edges to ensure a flush, high-strength weld joint.
• Self-Tightening Parabolic Nose: Features the classic Hensley parabolic nose taper, which increases surface-to-surface contact under load, reducing pocket play and extending adapter life.
• Through-Hardened Alloy Steel: Heat-treated through liquid quenching and tempering to achieve a surface/tip hardness of 48–52 HRC, offering an ideal balance of extreme wear life and impact toughness.
• Multi-Profile Tooth Versatility: Compatible with all 156-series tooth designs, including Standard Long (X156 / X156L), Single Tiger (X156T), Twin Tiger (X156WT), Heavy Impact Short (X156S), and Wide Flared (X156F).
• Tool-Assisted Top-Pin Locking System: Uses the standard P156 roll pin (3/8″ x 2″) inserted from the top, allowing fast, hassle-free tooth replacement with a standard drive punch and hammer.
• Direct OEM Interchangeability: Fully replaces OEM part numbers across major machinery brands, including Takeuchi 19142181-1, H&L 550X156 / C-550X156, and DURA GET T550X156 / 1588TW.

3. Technical Specifications

4. Equipment Fitment & Jobsite Applications

Compatible Machinery & Makes

• Takeuchi Compact Excavators: TB007, TB014, TB016, TB025, TB035, TB045, TB108, TB125, TB216, TB225FR, TB250-2, TB257FR, TB260, TB290, TB370.
• Bobcat Compact Equipment: E26, E32, E35, E42, E50 mini diggers and Bobcat skid steer dirt buckets.
• Kubota & Yanmar Mini Diggers: KX033, KX040, U35, U48, VIO35, VIO50.
• Caterpillar, John Deere, Case, JCB & Komatsu: Fits all mini excavators, backhoe buckets, and skid steer attachments equipped with a 1″ cutting edge lip.

5. Industry Applications

General Utility Trenching & Foundation Digging: Standard X156 long points for efficient loading in dirt, clay, and sand.

1. Frost, Hardpan & Shale Penetration: Single Tiger (X156T) and Twin Tiger (X156WT) points designed to concentrate breakout force into a sharp point to fracture frozen ground and sedimentary rock.
2. Demolition & Concrete Scraping: Heavy-duty short teeth (X156S) with reinforced cross-sections to resist tip breakage during high-impact pry work.
3. Ditch Cleaning & Trench Grading: Wide flare teeth (X156F) creating a smooth, flat trench bottom while scraping loose debris.

6. Manufacturing Process & Quality Assurance

To guarantee consistent performance under severe operating conditions, 550×156 bucket components undergo an advanced manufacturing workflow:

1. Precision Investment Casting / Alloy Forging: Formed using precision tooling to maintain micro-inch tolerances on the internal socket and parabolic nose. This ensures a snug fit that minimizes chatter and vibration during digging.
2. Spectrographic Chemical Control: Each heat melt is tested for alloy ratios (Carbon, Chromium, Molybdenum, Nickel) to meet strict tensile and toughness parameters.
3. Computerized Quenching & Tempering: Thermal processing alters the steel microstructure, yielding a high-wear surface (48–52 HRC) while maintaining an impact-absorbing inner core to prevent sudden fractures under load.
4. 100% Quality Gauge Testing: Critical dimensions, pinhole alignment, and weld prep bevels are checked prior to anti-rust coating and packaging.

7. Installation & Welding Guidelines

To achieve maximum weld strength when mounting 550×156 adapters:

1. Clean the Lip Surface: Grind away dirt, paint, slag, and rust on both top and bottom sides of the 1″ cutting lip.
2. Positioning & Spacing: Align adapters square to the cutting edge, spacing them evenly across the width of the bucket.
3. Preheating: Preheat the high-carbon steel cutting lip to 300°F – 400°F (150°C – 200°C) around the weld area to prevent hydrogen cracking.
4. Welding Procedure: Use a low-hydrogen welding rod (such as AWS E7018 or E8018) or flux-cored wire (E71T-1). Apply multi-pass fillet welds along the top and bottom adapter legs.
5. Cooling: Allow the welded assembly to cool slowly in ambient air. Do NOT quench welds with water.

8. Common Industry & Buyer FAQs

Q1: What does “550×156” mean?
A: “550” refers to the specific adapter strap dimension engineered for a 1.00-inch (25.4 mm) lip thickness, while “156” denotes the Hensley 156-series parabolic nose profile that fits all 156-series replacement teeth and P156 pins.

Q2: Can I install a 550×156 adapter on a 3/4″ or 1-1/4″ bucket lip?
A: It is not recommended. The 550×156 adapter gap is precisely machined for a 1-inch cutting edge. A 3/4″ lip will result in excessive weld gaps, while a 1-1/4″ lip will prevent the adapter from seating properly. Always match the adapter lip opening to your bucket lip thickness.

Q3: How do I change the tooth tip on a 550×156 adapter?
A: Slide the new X156 series tooth onto the adapter nose until the pin holes line up. Insert the P156 flex/roll pin into the top hole and drive it in with a steel punch and hammer until centered. To remove an old tooth, drive the pin straight out through the bottom.

Q4: Can I mix different tooth profiles on the same excavator bucket?
A: Yes! It is common practice in trenching to install Single Tiger (X156T) or Twin Tiger (X156WT) teeth on the outer corners to clear trench walls, while running Standard (X156) teeth in the center for dirt scooping.

Q5: How often should I replace the P156 roll pin?
A: It is best practice to replace the P156 locking pin whenever you replace the tooth tip. Reusing worn roll pins can reduce retention force, increasing the risk of losing teeth inside jobsite trenches.