--- title: Air Chucks for Heavy Equipment description: The Big Mouth II system from ATS Systems drastically reduces the time between workpieces, making chuck operation unbelievably easy cutting downtime. --- [Skip to content](https://www.atssystems.us/bp-air-chucks#main-content) [mailto:atssales@forkardthardinge.com](mailto:atssales@forkardthardinge.com) [Service Request](https://www.atssystems.us/service-request?hsLang=en) [Parts Request](https://www.atssystems.us/parts-request?hsLang=en) [Equipment Quote](https://www.atssystems.us/equipment-quote?hsLang=en) 800.321.1833 | atssales@forkardthardinge.com See Our Machine Tool Accessories and Solutions [![ATS Systems](https://www.atssystems.us/hs-fs/hubfs/ATS%203CLR-1.png?width=113&height=57&name=ATS%203CLR-1.png)](https://www.atssystems.us/?hsLang=en) - Products Show submenu for Products - Automation Show submenu for Automation - [Robotic Cells](https://www.atssystems.us/robotic-cells) - [Rotary Tables](https://www.atssystems.us/rotary-tables) - [Bar Feeders](https://www.atssystems.us/barfeeder) - Coolant Management Systems Show submenu for Coolant Management Systems - [CoolJet High Pressure](https://www.atssystems.us/cooljet-high-pressure) - [Filtration Systems](https://www.atssystems.us/filtration-systems) - [Coolant Chiller](https://www.atssystems.us/coolant-chiller) - [CoolVac – Chip & Sludge Vacuum](https://www.atssystems.us/coolvac) - Workholding Show submenu for Workholding - [Air Chucks](https://www.atssystems.us/bp-air-chucks) - [Collet Chucks](https://www.atssystems.us/collet-chucks) - [Cylinder Systems](https://www.atssystems.us/cylinder-systems) - [Steadyrests](https://www.atssystems.us/steadyrests) - [Insights](https://insights.atssystems.us/) - [Video Library](https://www.atssystems.us/video-library) - [Contact Us](https://www.atssystems.us/contact) Open main navigation Close main navigation - Products Show submenu for Products - Automation Show submenu for Automation - [Robotic Cells](https://www.atssystems.us/robotic-cells) - [Rotary Tables](https://www.atssystems.us/rotary-tables) - [Bar Feeders](https://www.atssystems.us/barfeeder) - Coolant Management Systems Show submenu for Coolant Management Systems - [CoolJet High Pressure](https://www.atssystems.us/cooljet-high-pressure) - [Filtration Systems](https://www.atssystems.us/filtration-systems) - [Coolant Chiller](https://www.atssystems.us/coolant-chiller) - [CoolVac – Chip & Sludge Vacuum](https://www.atssystems.us/coolvac) - Workholding Show submenu for Workholding - [Air Chucks](https://www.atssystems.us/bp-air-chucks) - [Collet Chucks](https://www.atssystems.us/collet-chucks) - [Cylinder Systems](https://www.atssystems.us/cylinder-systems) - [Steadyrests](https://www.atssystems.us/steadyrests) - [Insights](https://insights.atssystems.us/) - [Video Library](https://www.atssystems.us/video-library) - [Contact Us](https://www.atssystems.us/contact) # AIR CHUCKS ![Air Chucks](https://www.atssystems.us/hs-fs/hubfs/Copy%20of%20Copy%20of%20Copy%20of%20AUTOMATION%20(4).png?width=600&height=600&name=Copy%20of%20Copy%20of%20Copy%20of%20AUTOMATION%20(4).png "Air Chucks") ### Big Mouth II Air Chuck Features #### Self-contained pneumatic power chucks with big through hole - Built-in cylinder, no drawtube to reduce lathe spindle bore. - Big unobstructed through-hole - Adjustable grip force - Sizes 8” to 40”, through-holes to 22” - “**Easy-Mount design**”, all models - Fully assemble on bench and bolt directly to adapter plate - No cumbersome chuck assembly on lathe spindle - **New** – maintenance free non-return valve - **Safer** – allows pressure testing entire chuck including valves - **New** – Longer life Quad-ring seals on all dynamic surfaces - Full custom packages installed on your lathe by ATS world class Service Technicians - Two year warranty with ATS installation - Support by local ATS Service Technician through the life span of the chuck. [Request Air Chuck Quote](https://www.atssystems.us/equipment-quote?hsLang=en) [Spare Parts List and Drawings](https://www.atssystems.us/hubfs/Recommended%20Spare%20Parts%20List%20-%20Air%20Chuck%20Form%20Updated%204.22.26.pdf?hsLang=en) [Operation and maintenance Manual](https://www.atssystems.us/hubfs/AirChucks/ATS%20SYSTEMS%20-%20BIG%20MOUTH%20AIR%20CHUCK%20MANUAL%202025%20-%20web%20download.pdf?hsLang=en) [Download BigMouth Air Chuck Brochure](https://www.atssystems.us/hubfs/AirChucks/BigMouthBrochure%202025.pdf?hsLang=en) #### Cut downtime to the bare minimum with Big Mouth II air chucks from ATS Systems. The Big Mouth II system drastically reduces the time between workpieces, making chuck operation unbelievably easy. #### Typically uses for a Pneumatic chuck are Pipe threading, large-diameter parts, utilizing the entire spindle bore diameter or in cases when a cylinder may not have a large enough thru-hole. [Recommended Spare Parts for Big Mouth Air Chucks](https://www.atssystems.us/hubfs/AirChucks/Recommended%20Spare%20Parts%20List%20-%20Air%20Chuck%202025.pdf?hsLang=en) | **Chuck Model** | | **BP-200-52** | **BP-265-80** | **BP-315-105** | **BP-480-185** | **BP-500-230** | **BP-640-275** | **BP-800-375** | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Nominal Size | | **8”** | **10”** | **13”** | **19”** | **22”** | **25”** | **31”** | | Through Hole | | **2.05** | **3.15** | **4.13** | **7.28** | **9.06** | **10.83** | **14.76** | | Face Diameter | | **8.1** | **10.4** | **13.2** | **18.9** | **22.4** | **25.2** | **31.5** | | Rear Diameter | | **11.8** | **14.6** | **14.6** | **20.9** | **22.4** | **27.0** | **33.5** | | Length | | **5.3** | **5.8** | **6.2** | **8.8** | **8.8** | **10.3** | **12.0** | | Jaw Stroke/Jaw | **In.** | **.165** | **.197** | **.197** | **.334** | **.334** | **.394** | **.472** | | Jaw Serration | | **1/16 x 90** | **1/16 x 90** | **1/16 x 90** | **3/32 x 90** | **3/32 x 90** | **3/32 x 90** | **3/32 x 90** | | Maximum Speed | **RPM** | **2800** | **2200** | **2200** | **1500** | **1300** | **1000** | **750** | | Max. Operating Pressure | **PSI** | **120** | **120** | **120** | **120** | **120** | **120** | **120** | | Grip Force @ 90 PSI | **Lbs. Total** | **13950** | **21400** | **19300** | **41860** | **44187** | **61600** | **61600** | | **Chuck Model** | | **BT 4.1 ES** | **BT 7.3 ES** | **BT 10.8 ES** | **BT 12.8 ES** | **BT 14.8 ES** | | --- | --- | --- | --- | --- | --- | --- | | Through Hole | **In.** | **4.13** | **7.28** | **10.82** | **12.80** | **14.76** | | Chuck Length | **In.** | **7.9** | **11.1** | **11.1** | **12.1** | **12.10** | | Jaw Stroke/Jaw | **In.** | **0.6** | **1.0** | **1.0** | **1.0** | **1.0** | | Jaw Serration | | **1/16 x 90** | **3/32 x 90** | **3/32 x 90** | **3/32 x 90** | **3/32 x 90** | | Swing Clearance | **In.** | **14.9** | **21.7** | **26.7** | **29.4** | **31.4** | | Maximum Speed | **RPM** | **2000** | **1300** | **1100** | **900** | **750** | | Normal Operating Pressure Range | **PSI** | **60-90** | **60-90** | **60-90** | **60-90** | **60-90** | | Max. Operating Pressure | **PSI** | **120** | **120** | **120** | **120** | **120** | | Weight | **Lbs.** | **220** | **500** | **700** | **1200** | **1300** | ## AIR CHUCKS FOR HEAVY EQUIPMENT For tubular applications, we recommend our BT series of air chucks. Our BP series is made for general chucking needs as it’s capable of OD & ID chucking where the BT series is for OD clamping applications only. All models of Big Mouth II Air Chucks are engineered for easy installation, and all of our models use our Easy Mount design. The chuck can be fully assembled on a workbench and bolted directly to an adapter plate. No worries about assembling on the lathe spindle. [RMA/Warranty Terms & Conditions](https://www.atssystems.us/hubfs/ATS%20SYSTEMS%20RMA%20WARRANTY%20TERMS%20AND%20CONDITIONS%202025%20-%20OPTIMIZED%20FOR%20WEB.pdf?hsLang=en) [![ATS Systems](https://www.atssystems.us/hs-fs/hubfs/ATS%203CLR-1.png?width=113&height=57&name=ATS%203CLR-1.png "ATS Systems")](https://www.atssystems.us/?hsLang=en) ATS Systems, driven by Forkardt Hardinge is a leading national machine tool accessories and automation supplier delivering reliable solutions with unwavering support that increases manufacturing productivity and throughput leading to profitable results for its customers.   [About Us](https://www.atssystems.us/about-us?hsLang=en)[Insights](https://insights.atssystems.us?hsLang=en) [International Dealers](https://www.atssystems.us/international-dealers?hsLang=en) ##### [Contact us](https://www.atssystems.us/contact?hsLang=en) [800.321.1833](tel:8003211833)  [atssales@forkardthardinge.com](mailto:atssales@forkardthardinge.com)  [facebook-f icon](https://www.facebook.com/ATS.Systems.US) [linkedin-in icon](https://www.linkedin.com/company/ats-systems-us/) [Twitter icon](https://twitter.com/Ats_Systems_) ATS supports machine shops and manufacturing plants worldwide offering best-in-class workholding solutions, custom design, automation, coolant systems, and parts and services embracing productivity challenges the market presents.  ##### Copyright © 2026, Forkardt Hardinge ---