Attributes

Brand	-
Category	Root / Metal Materials & Products
Origin	-
Material Grade	QSn4-3 Tin Bronze
Application	Injection Molding Machines
Key Feature	High Wear Resistance
Customization	Non-Standard Sizes Available
Manufacturing Process	Precision Cast and Machined
Surface Finish	Smooth Polished Bore
Hardness	HB 90-120
Lead Time	7-15 Days for Custom Orders
Quality Standard	ISO 9001 Certified
Origin	Industrial Manufacturing Hub

6 reviews

Anonymous

Mar 23, 2026

Rating: 5/5

Great for non-standard specs

Finding sleeves for our proprietary machine design was difficult until we found this manufacturer. They accommodated our weird dimensions perfectly without compromising on material integrity.

Anonymous

Mar 20, 2026

Rating: 4/5

Good quality, slight delay

The bronze sleeves are high quality and show excellent wear resistance so far. Delivery took a few days longer than expected due to the custom machining, but the product is worth the wait.

Anonymous

Mar 12, 2026

Rating: 4/5

Solid industrial component

These are robust sleeves. The surface finish on the bore is very smooth, which helps with lubrication. Price is fair for custom metalwork.

Anonymous

Mar 08, 2026

Rating: 5/5

Excellent wear resistance

Replacing standard bushings with these tin bronze sleeves has significantly reduced maintenance downtime. They handle the high-pressure environment of our molding machines very well.

Anonymous

Mar 05, 2026

Rating: 5/5

Reliable supplier

Second time ordering from this supplier. Consistency in the QSn4-3 alloy composition is evident. Our production team is happy with the performance.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect fit for our molding line

We ordered custom-sized sleeves for our older injection molding machines. The QSn4-3 material is exactly what we needed for durability. Fit was precise and installation was smooth.

5 FAQ

Q: What tolerance standards do you follow for the inner diameter?

A: We typically adhere to ISO H7/f7 tolerance classes for sliding fits, but we can adjust to tighter tolerances if your engineering specifications require it.

Q: What is the typical lead time for a batch of 50 custom sleeves?

A: For a batch of 50 units, the typical lead time is approximately 10 to 12 working days after the final design confirmation and deposit receipt.

Q: Do you provide material certification with the shipment?

A: Absolutely. Every shipment includes a Mill Test Certificate (MTC) detailing the chemical composition and mechanical properties of the QSn4-3 alloy used.

Q: Can you manufacture sleeves with inner diameters larger than 200mm?

A: Yes, we specialize in non-standard custom sizes. We can produce sleeves with inner diameters exceeding 200mm based on your specific technical drawings.

Q: Is the QSn4-3 material suitable for high-temperature applications?

A: QSn4-3 tin bronze offers good thermal conductivity and retains strength at elevated temperatures common in injection molding, making it a suitable choice for these environments.

Explore your interests

Kingston Official Flagship Store – 64GB DTX High-Speed USB Flash Drive, Large Capacity, Customizable for Car Use, Genuine Portable U Disk

$49.90

Purple Copper Mesh, 10-400 Mesh Experimental Filter Net, Anti-Static Grounding and EMI Shielding for Server Rooms

$18.00

Jiesuyou Genuine High-Capacity USB Flash Drive - 64GB/128GB/32GB High-Speed USB 3.0 for Car Audio, Phones, and Computers

$11.90

usmile Electric Toothbrush Heads Compatible with Y30 Pro Official Replacement Heads Brightening Soft Bristles for Adults

$78.89

Oral-B iO Replacement Brush Heads - Gentle Cleaning and Whitening Type

$179.00

Condoms 100-Pack Ultra-Thin 001 Hyaluronic Acid Invisible Ribbed Large Dots Stimulating Long-Lasting for Men

$5.90

New GPS Locator with Recording Function – Vehicle Anti-Theft Tracking Device, Beidou Navigation System, Anti-Loss Gadget by Bangdaotu

$59.00

Kingston USB Flash Drive 128GB High-Capacity Genuine 256 High-Speed DTXM for Business and Office Use, Also Available in 64GB and 256GB

$44.50

BENJIE MP4 Music Player - Dedicated MP3/MP5 Bluetooth Walkman for High School Students, Pre-loaded with Novels and Songs

$79.90

Queen Card 30 Yuan, Queen Card 30, Official Queen Card Key, Automatic Delivery, No Fake Orders, Beware of Fraud

$30.00

YOOKO Electric Heated Eyelash Curler S10P, Rechargeable Long-Lasting Curling Tool

$58.60

ASUS High-Speed Memory Card for Dash Cams & Surveillance Cameras – TF/microSD Cards (64GB/128GB), Class 10, 100MB/s, Universal Compatibility

$49.82

Aigo Bluetooth MP3 Player - Student Edition MP4 with Camera, Novel Reading Feature for High Schoolers

$129.00

Seemagic Electric Nail Trimmer & Grinder - All-in-One Automatic Manicure Tool for Kids & Seniors

$86.00

Niliya Reshape V1 Face Slimming Bandage, Lifting and Tightening for Nasolabial Folds and Double Chin, Sleep Facial Contouring Mask

$19.65

High-Speed USB Drive 128GB Large Capacity, Dual-Use for Mobile Phones and Computers, 64GB USB Drive for Men, Women, and Students, 16GB Car USB Drive, Affordable

$15.10

SanDisk Official Genuine USB Flash Drive Type-C Dual Interface Large Capacity for Phone and Computer Android iOS Car Use

$109.90

High-Purity Oxygen-Free Copper Foil for Research - Custom Ultra-Thin Sheets with Mirror Polish Finish

$18.00

H62 Brass Plate & H59 Brass Sheet/Strip – Custom Laser Engraving, Pure Copper Blocks, Metal Parts Fabrication

$2.47

Jinghao Hyaluronic Acid Condoms - Ultra-Thin Official Authentic Men's Adult Intimate Product for Couples

$5.90

Jissbon Condoms - Ultra-Thin Hyaluronic Acid Lubricated Series

$59.40

usmile Kids Electric Toothbrush Ages 3-12 Smart Voice Reminder Gift Model Q20

$299.00

Junwang Taole One-Card Pass 100 Yuan - Official Card Code, Automatic Issuance, Beware of Scams, Do Not Leak Card Codes

$100.00

Kingston Official Authentic High-Speed TF Memory Card 128GB for Surveillance, Dash Cam, DJI, Tablet, Pocket 3

$99.90

JNN Pen-Shaped Voice Recorder, Portable Professional HD Noise Reduction Device for Lawyers & Students, Classroom Transcription Equipment A

$68.00

Philips Official Original Electric Toothbrush Heads Compatible with Diamond 3/7/9 Series Handles - Cleaning, Gum Care, and Whitening C2

$59.00

Honor of Kings Coupon Top-Up Service: 1000/2000/5000/10000 Coupons, Rechargeable with Noble Level Upgrade

$35.99

Queen Card 20 Yuan - Auto Delivery, Official Code. No Fake Orders. Beware of Gambling Scams.

$20.00

Queen Card 100 Yuan - Official Queen Card Code, Auto Delivery, No Fake Orders, Beware of Scams

$100.00

Wuthering Waves Recharge International/CN Server 6480 Diamonds Top-up Service, 648 Yuan Lunar Phase Whale Spending, Universe Channel Monthly Card

$23.99

High-Capacity USB Flash Drive with Type-C Dual Interface, 128GB/512GB, High-Speed for Phones and Computers

$26.50

Small Capacity Full-Size TF Cards: 128MB/256MB/512MB/1GB/2GB/8GB/16GB/32GB Mobile Phone Memory Storage Cards

$6.50

Jissbon Zero Sense Thin Condoms Ultra-Thin Barely-There Feel Men's Pleasure 6pcs x 2 Boxes (12pcs Total)

$45.80

Copper Plate T2 Purple Copper Plate Pure Copper Material Heat Dissipation Purple Copper Sheet Red Copper Plate Laser Cutting Pure Purple Copper Block Custom Processing

$1.20