Office Chairs >>
HKM-875923 Ergonomic Office Chair with 2D Headrest and 7D Adjustable Armrests, Swivel Design for Comfort and Support
HKM-875923
Ergonomic Office Chair
Precision-engineered to transform your daily workspace into a hub of comfort, support, and effortless productivity.
Overview
Rethink the way you sit.
The HKM-875923 is not just a chair — it is a meticulously crafted seating solution that adapts to your body, your workflow, and your environment. Every contour, every adjustment point, and every material choice has been refined to deliver an uncompromising experience.
2D Adjustable Headrest
Fine-tune both height and tilt angle to cradle your neck in its natural alignment. Reduces cervical strain during extended focus sessions.
7D Multi-Axis Armrests
Seven independent adjustment directions — height, depth, width, pivot, lateral slide, fore-aft, and angular tilt — letting you position support exactly where you need it.
360° Swivel Base
Glide seamlessly between tasks with a whisper-smooth swivel mechanism. The wide-stance base ensures rock-solid stability through every rotation.
Built to Last
High-density structural components, reinforced joints, and premium upholstery ensure this chair remains a cornerstone of your workspace for years.
Deep Dive
2D Headrest: Neck Support Refined.
Your cervical spine deserves more than a fixed cushion. The HKM-875923's 2D headrest delivers adaptive geometry that follows your posture throughout the day.
Vertical Travel Range
The headrest glides through a generous vertical range of approximately 3.9 in (10 cm), accommodating users of varying torso lengths. Whether you stand 5'2" or 6'4", the headrest meets your neck where it naturally rests.
3.9 in / 10 cm adjustmentAngular Tilt Mechanism
A smooth tilt articulation allows the headrest to pivot forward and backward, ensuring the cushion surface remains parallel to the back of your head — reducing pressure points and encouraging a neutral cervical curve.
±15° tilt rangeInnovation
7D Armrests: Seven Dimensions of Personalization.
Where most chairs offer two or three adjustments, the HKM-875923 provides seven. This is not a gimmick — it is a fundamental rethinking of upper-body support in seated work.
Complete 7-Axis Control
The armrests adjust vertically (up/down), horizontally (left/right slide), depth-wise (forward/back), angularly (pivot rotation), laterally (width expansion), fore-aft independently, and in tilt angle. This means your elbows, forearms, and wrists always find a supported, neutral position — reducing shoulder tension and preventing repetitive strain.
7 independent adjustment axesErgonomic Load Distribution
By enabling precise armrest positioning, the 7D system distributes upper-body weight evenly across the chair's structure rather than concentrating it on your shoulders. This subtle engineering detail significantly reduces fatigue during 8+ hour work sessions.
Reduced shoulder loadMobility
Effortless 360° Movement.
The swivel base is engineered for silent, fluid rotation — enabling you to pivot between screens, reach across your desk, or turn toward a colleague without leaving your seat.
Precision Swivel Hub
At the core of the HKM-875923 lies a precision-machined swivel hub that rotates on sealed ball bearings. The result is a chair that turns with virtually zero resistance and zero noise — even after thousands of cycles. The wide five-star base spans approximately 27.6 in (70 cm) in diameter, delivering exceptional tip-over stability.
27.6 in / 70 cm base spanCraftsmanship
Materials That Endure.
Every surface, every stitch, and every structural element of the HKM-875923 is selected for longevity without sacrificing aesthetics.
Premium Upholstery & Frame
The seating surface features high-resilience molded foam with a density optimized for both comfort and structural integrity. The outer upholstery is abrasion-resistant, colorfast, and engineered to maintain its texture through years of daily use. The internal frame uses reinforced polymer composites and steel alloys at critical stress points.
High-resilience foam coreWeight Capacity & Structural Integrity
The HKM-875923 is tested to support up to 300 lbs (136 kg) of static load, with all adjustment mechanisms retaining full functionality across the entire weight range. The gas lift cylinder is certified for extended cycle life, maintaining smooth height modulation even after prolonged heavy use.
300 lbs / 136 kg capacitySpecifications
Technical Details.
Every dimension and capability of the HKM-875923, presented transparently.
45.3–49.2 in
Overall Height (115–125 cm)
20.5 in
Seat Width (52 cm)
19.7 in
Seat Depth (50 cm)
27.6 in
Base Diameter (70 cm)
300 lbs
Max Capacity (136 kg)
360°
Swivel Rotation
Scenarios
Designed for Every Workspace.
From the home office to the executive suite, the HKM-875923 adapts with quiet confidence.
Home Office
Blends into your personal workspace with a sleek, unobtrusive silhouette while providing professional-grade ergonomics for remote work productivity.
Corporate Environment
A refined aesthetic that complements open-plan offices, boardrooms, and executive desks alike. The understated design language speaks to professionalism.
FAQ
Frequently Asked Questions.
Clear answers to the most common inquiries about the HKM-875923.
What exactly does "7D" mean for the armrests?
The "7D" designation refers to seven independent adjustment directions: vertical height (up/down), horizontal slide (left/right), depth adjustment (forward/backward), pivot rotation (angular swivel of the pad), width expansion (lateral spacing between armrests), fore-aft fine-tuning (micro-adjustments along the depth axis), and tilt angle (inclination of the armrest pad surface). This comprehensive adjustability ensures optimal support for a wide range of body types and desk setups.
How does the 2D headrest differ from a standard fixed headrest?
A standard fixed headrest offers one static position. The HKM-875923's 2D headrest allows you to adjust both the vertical height (sliding up and down to match your neck's natural resting point) and the tilt angle (pivoting to maintain parallel contact with the back of your head). This dual adjustability is critical for maintaining proper cervical alignment, especially for users who alternate between reclined and upright postures throughout the day.
What is the weight capacity of this chair?
The HKM-875923 has been tested and certified to support up to 300 lbs (136 kg) of static load. All adjustment mechanisms — including the gas lift, tilt tension, and armrest locks — are designed to function reliably across the full weight range. We recommend verifying that your body weight falls within this limit to ensure optimal performance and longevity.
Is the chair suitable for users of different heights?
Yes. The combination of an adjustable seat height, a 2D headrest with approximately 3.9 in (10 cm) of vertical travel, and 7D armrests that accommodate various arm lengths makes the HKM-875923 suitable for users ranging from approximately 5'1" to 6'5" (155 cm to 196 cm). The deep seat pan and contoured backrest further enhance compatibility across body types.
What type of flooring is compatible with the casters?
The HKM-875923 comes equipped with smooth-rolling multi-surface casters that perform well on hardwood, laminate, tile, and low-pile carpet. For plush or high-pile carpets, we recommend using a chair mat to ensure effortless mobility and to protect both the flooring and the casters over time.
How does the swivel mechanism hold up over time?
The swivel hub incorporates sealed ball bearings housed within a reinforced steel collar. This design is rated for well over 100,000 rotation cycles without degradation in smoothness or noise levels. The wide five-star base — spanning 27.6 in (70 cm) in diameter — provides a stable foundation that resists wobble even as the swivel ages.
Policies
Peace of Mind Included.
Every HKM-875923 purchase comes with comprehensive coverage.
Free Shipping
Complimentary delivery on all orders — no minimum purchase required. Carefully packaged to arrive in pristine condition.
180-Day Protection
Extended purchase protection covers manufacturing defects and material flaws for a full 180 days from the date of delivery.
30-Day Money-Back
Not satisfied? Return the chair within 30 days for a full refund — no questions asked. Your satisfaction is our priority.
24-Month Warranty
Comprehensive warranty coverage for two full years. Includes parts, labor, and responsive customer support for any warranted issue.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
