SUNLU Large Spool 5KG ABS Filament - Durable, High Heat Resistance

In this review of the SUNLU Large Spool 5KG ABS Filament, the bottom line is simple: this spool is aimed at serious hobbyists and small workshops that need long, uninterrupted prints and a material that stands up to heat and impact. The 5KG capacity eliminates frequent spool swaps for large projects, while the ABS formulation offers higher temperature resistance and toughness compared with PLA. For those printing functional parts, enclosures, or objects that need post-processing like acetone smoothing, this filament delivers consistent results most of the time.

Key Features

• 5KG spool: Reduces print interruptions on large jobs so long prints finish without changing filament.
• Heat resistant ABS: Suitable for functional parts and prototypes that require higher temperature performance than common filaments.
• High toughness and impact resistance: Prints parts that resist deformation, surface wear and minor impacts over long-term use.
• Precise diameter tolerance: 0.02 mm diameter control helps maintain stable extrusion and consistent layer quality.
• Printer compatibility: Works with most 1.75 mm FDM printers and a spool hub designed for easier unwinding on many machines.
• Good surface finish: Smooth printing with limited stringing and favorable adhesion for post-processing like acetone smoothing.

Who It's For

This filament suits makers who run medium to large prints frequently and need a durable, heat-resistant material for functional parts, jigs, tool mounts, and post-processed models. Users with printers that support a 300 mm spool diameter and a 55 mm hub hole will find the spool fits and unwinds cleanly.

Those who prioritize vivid color accuracy or ultra-fine aesthetic models over toughness may want to compare alternatives; also beginners using printers without a heated bed or who cannot reliably reach the recommended nozzle and bed temperatures might struggle with bed adhesion and warping.

Pros & Cons

Pros

• Large 5KG spool saves time and is economical for repetitive printing.
• ABS formulation provides strong heat resistance and impact toughness for functional parts.
• Tight diameter tolerance and smooth filament reduce extrusion inconsistencies and tangles.
• Spool dimensions and larger hub hole make mounting and unwinding easier on many FDM printers.

Cons

• ABS requires higher nozzle and bed temperatures and care to avoid warping, which adds setup complexity.
• Some users report mixed adhesion results, so bed preparation and proper settings are essential.

Specifications

Our Verdict

The SUNLU 5KG ABS spool is a very practical choice for makers and small shops that need long run times and a tougher, heat-resistant filament for functional prints. It represents good value when large volumes are required and performs well with correct temperature and bed preparation; users who can meet the printing conditions will find it durable and easy to post-process.

Frequently Asked Questions

Will this spool fit my printer?
The spool is 300 mm diameter with a 55 mm hub hole and fits most printers that accept larger hobby spools, but check your printer's spool mount dimensions.

What print settings are recommended?
Use a nozzle temp of about 250-260C, bed temp 80-100C, print speed 40-60 mm/s and retraction around 5 mm at 50 mm/s for best results.

How does it handle post-processing?
Surface finish sands and acetone-smooths well thanks to the filament's consistency and good adhesion, producing an attractive appearance after treatment.