KOENIG EXPANDER® SERIES MB 850 – OVERVIEW
The KOENIG EXPANDER® Series MB 850 plugs effectively seal drilled holes. These parts feature a serrated sleeve which expands as the ball is inserted, enlarging the part to the needed size and sealing the hole. For installation, push-style expanders require a hole drilled with a counter bore. If you are unsure if the MB 850 expander sealing plug series is the right component for your application, use our Product Selector to identify the best KOENIG EXPANDER part for your specifications.
The KOENIG EXPANDER® Series MB 850 plugs effectively seal drilled holes. These parts feature a serrated sleeve which expands as the ball is inserted, enlarging the part to the needed size and sealing the hole. For installation, push-style expanders require a hole drilled with a counter bore. If you are unsure if the MB 850 expander sealing plug series is the right component for your application, use our Material:
Sleeve: Case Hardening Steel Zinc Plated, Thick Coat Passivated, CR (VI)-Free Ball: Bearing Steel, Heat Treated
Product SpecificationsPressure PerformanceTechnical DownloadsVideo
| Product Number | d1 | l1 | (l2) ~ Ref. | d2 +0.10 / -0 | d3 Max | l3 min. | x ±0.2 | (s) ~ Ref. | Packaging Unit | Weight in gram/pcs. | 3D CAD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MB 850-030 | 3 | 3.6 | 4.6 | 3 | 2.2 | 3.4 | 0.4 | 1.2 | 100 / 1000 | 0.17 | View CAD |
| MB 850-040 | 4 | 4 | 5.2 | 4 | 3.3 | 3.8 | 0.2 | 1.5 | 100 / 2000 | 0.34 | View CAD |
| MB 850-050 | 5 | 5.5 | 7.1 | 5 | 4.3 | 5.3 | 0.4 | 2.0 | 100 / 2000 | 0.68 | View CAD |
| MB 850-060 | 6 | 6.5 | 8.6 | 6 | 5.3 | 6.3 | 0.4 | 2.5 | 100 / 2000 | 1.17 | View CAD |
| MB 850-070 | 7 | 7.5 | 10.1 | 7 | 6.4 | 7.3 | 0.4 | 3.0 | 100 / 1000 | 1.91 | View CAD |
| MB 850-080 | 8 | 8.5 | 11.6 | 8 | 7.4 | 8.3 | 0.3 | 3.5 | 50 / 1000 | 2.84 | View CAD |
| MB 850-090 | 9 | 10 | 13.6 | 9 | 8.4 | 9.8 | 0.4 | 4.0 | 50 / 500 | 4 | View CAD |
| MB 850-100 | 10 | 11 | 15.1 | 10 | 9.4 | 10.8 | 0.4 | 4.5 | 50 / 500 | 5.47 | View CAD |
| MB 850-120 | 12 | 13 | 17.9 | 12 | 10.6 | 12.8 | 0.4 | 5.5 | 50 / 250 | 9.31 | View CAD |
| MB 850-140 | 14 | 15 | 20.6 | 14 | 12.7 | 14.5 | 0.4 | 6.35 | 50 / 250 | 14.72 | View CAD |
| MB 850-160 | 16 | 17 | 23.4 | 16 | 14.7 | 16.5 | 0.6 | 7.0 | 25 / 100 | 22 | View CAD |
| MB 850-180 | 18 | 19 | 26.4 | 18 | 16.7 | 18.5 | 0.6 | 8.0 | 25 / 100 | 31.34 | View CAD |
| MB 850-200 | 20 | 22 | 30.1 | 20 | 18.7 | 21.5 | 0.8 | 9.0 | 25 / 100 | 44.24 | View CAD |
| MB 850-220 | 22 | 25 | 34 | 22 | 20.7 | 24.5 | 0.8 | 10.0 | 25 / 50 | 58.61 | View CAD |
Dimension in millimeters
| Series MB 850 mm |
Base Material of the Installation | ||||||
|---|---|---|---|---|---|---|---|
| High Strength Steel ETG-100 / 44SMn28 AISI 1144 |
Case Hardened Steel C15Pb / 1.0403 AISI 10L15 |
Ductile Cast Iron EN 1563: GJS-600-3 ASTM A536: 80-60-03 |
Gray Cast Iron EN 1561: GJL-250 ASTM A48: NO.35 |
Aluminum-Alloy AICu4Mg1 / EN AW-2024-T3 AA: 2024 T4/T6* |
Aluminum-Alloy AIMgSiPb / EN AW-6012-T6 AA: 6012-T6 |
Cast Aluminum-Alloy G-AISi7Mg / EN-AC-42100 ASTM/UNS: A356 |
|
| Ø 3 – 10 | 1100 bar / 16000 psi 350 bar / 5100 psi |
1000 bar / 14500 psi 320 bar / 4600 psi |
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| Ø 12 – 22 | 900 bar / 13000 psi 280 bar / 4100 psi |
800 bar / 11600 psi 250 bar / 3600 psi |
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| Proof Pressure Test – Ⓑ Max. allowable Working Pressure = Nominal Pressure *SFC KOENIG’s North American Engineering Department utilizes 2024-T4/T6 as a test base material. |
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Operation
Technical Information
- Design Guidelines – wall thickness / distance from edge; required installation lengths, roundness tolerance, and conicity of the bore – view page or downloadable PDF
- Anchorage Principle – view page or downloadable PDF
- Galvanic Corrosion – view page or downloadable PDF
- Technical Information – test pressure, base material / installation requirements, pressure performance – view page or downloadable PDF
- Hardness Conversion Table – view page or downloadable PDF
- Quality Certificates