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Sentrol

HardwareSeoul, South KoreaFounded 2013· One of 1733 Hardware companies tracked by AMPulse

Develops industrial metal and sand 3D printers using SLM and SLS technologies for casting, aerospace, automotive, and medical applications.

CEO / Founder
Seong Hwan Choi
Team Size
51-200
Stage
Active
Latest Round
Series B

Technology & Products

Key Products

SM350 metal 3D printer (SLM); SM250 metal 3D printer (SLM); SS400(G) sand 3D printer (SLS); SS600 sand 3D printer (SLS); CNC controllers

Technological Advantage

Proprietary SLM and SLS processes with large build volumes (up to 400×400×400mm for sand, 350mm diameter × 330mm height for metal) and user-friendly CNC-based operation

Patent position

Sentrol filed 68 patent families across all years, compared with 185 for EOS and 104 for voxeljet. AMPulse analysis

Filing momentum
0 families filed 2022–2024, 1 in 2019–2021
Filed in
KR 94%US 3%WO 3%
Named competitors, AM patent families
EOS 185voxeljet 104

68 AM patent families in total. Recent years are still being published, so read a filing change against the same-office figure.

Differentiation

Value Proposition

Reduces lead times for complex metal parts and sand casting molds by 70-80% compared to traditional methods, enabling rapid prototyping and low-volume production.

How They Differentiate

Offers both metal SLM and sand SLS printers in one portfolio with CNC control expertise; SM350 provides 30mm taller build height than previous models at competitive price points

Market & Competition

Target Customers

Industrial manufacturers in aerospace, automotive, medical, and foundry industries

Industry Verticals

Aerospace; Automotive; Medical; Industrial Machinery; Foundry

Competitors

EOS; SLM Solutions; Voxeljet

Growth & Milestones

Growth Metrics

Revenue ₩8.2B in 2025, up 145% from ₩3.4B in 2024; 45 printer shipments in 2025, cumulative 120 since 2020; 85 employees as of March 2026, up 40% from 61 in 2024; 23 patents granted as of February 2026; 30+ customers including Hyundai Rotem and Korea Aerospace Industries, with 60% revenue from exports to Japan and EU; ~8% market share in Korea metal AM hardware in 2025.

Major Milestones

1985: First domestic CNC controller developed; 2013: Entered 3D printing market; 2015: Commercialized sand casting 3D printer; 2016: Launched SM350 metal 3D printer and SS600 sand 3D printer; 2019: Partnership with 3D Fine for SS400(G) sand printer deployment

Notable Customers

Hyundai Motor, Kia Motors, Korea Aerospace Industries (KAI), Doosan Infracore, Samsung Heavy Industries

https://www.sentrol.net

AM patents

AM-relevant patents linked to this company.

Patents
68
Granted
39
Families
68

Leading domains: process (68), equipment (63), material (35)

Filings by year: 2019: 1 · 2018: 2 · 2017: 28 · 2016: 5 · 2015: 23 · 2014: 5

  1. APPARATUS FOR PRODUCING A THREE-DIMENSIONAL OBJECT AND PRODUCING METHOD USING THE SAME20170002862 · KR
  2. LASER MANUAL ADJUSTMENT AND DISPLAYING APPARATUS, AND METHOD FOR PRODUCING A THREE-DIMENSIONAL OBJECT20170002858 · KR
  3. MATERIAL SUPPLYING APPARATUS FOR PRODUCING A THREE-DIMENSIONAL OBJECT AND MATERIAL SUPPLYING METHOD USING THE SAME20170002854 · KR
  4. 3D 프린터1018722100000 · KR
  5. MANUFACTURING SYSTEM AND METHOD USING THE LASER FOR PRODUCING A THREE-DIMENSIONAL OBJECT20170002861 · KR

Why this company matters

AMPulse analysis, not a company disclosure

SENTROL occupies a distinct position in the industrial additive manufacturing market by offering both metal powder bed fusion (PBF-LB) and sand SLS printers under one roof, a combination rarely found among Western competitors. Founded in 1985 as a CNC controller developer, the company entered 3D printing in 2013 and has since leveraged its precision motion-control heritage to build machines that emphasize reliability and ease of use for traditional manufacturing environments.

The product lineup includes the SM350 and SM250 metal SLM printers, which handle build volumes up to 350 mm in diameter and 330 mm in height, and the SS400(G) and SS600 sand SLS printers with build volumes up to 400 mm cubed. SENTROL claims its integrated CNC-based operation reduces lead times for complex metal parts and sand casting molds by 70–80% versus conventional methods, targeting rapid prototyping and low-volume production runs.

Key customers include Hyundai Motor, Kia Motors, Korea Aerospace Industries (KAI), Doosan Infracore, and Samsung Heavy Industries, reflecting a strong foothold in South Korean aerospace, automotive, and industrial machinery. The company reported 45 printer shipments in 2025 and cumulative sales of 120 units since 2020, with 60% of revenue coming from exports to Japan and the EU. Revenue reached ₩8.2 billion in 2025, up 145% year-over-year, and SENTROL held roughly 8% of the Korean metal AM hardware market.

SENTROL's strategic moat rests on its dual-technology portfolio and decades of CNC control IP, but it faces intense competition from established players such as EOS and SLM Solutions in metal, and Voxeljet in sand casting. The company has raised ₩28.5 billion from investors including Korea Investment Partners, KB Investment & Securities, and Hanwha Systems, and employs 85 people as of early 2026. Its ability to scale beyond Korea and defend against lower-cost Chinese entrants will determine whether it can sustain its growth trajectory.