Features:
• Semi-Steel body
• Type A1 spindle has 2 bolt hole pattern, inside and outside the taper. Either an A1 or A2 chuck will fit
• Type A2 spindle has a 1 bolt pattern outside the taper. Only an A2 chuck will fit

Note: We are using generic picture of chuck. Please review title as well as description of listing before you purchase.

Each chuck is provided with:
• 1 Set of hard master jaws
• 1 Set of hard top reversible jaws
• 1 Chuck wrench
• 1 Set of mounting bolts
• 2 Hex keys
• 2 Eye bolts with 16” - 32” chucks
• 3 Pinion design

3-Jaw Universal Self-Centering Scroll Chucks

Semi Steel Body, Plain Back, Adapter Plates Required

• These chucks can be used on all types of lathes, and on different kinds of milling, drilling, and CNC attachments
• Chucks come with either American Standard two-piece tongue and groove jaws, or two sets of hard solid OD and ID jaws
• Plain Back and Direct Mount
• Semi-steel body
• Chuck body is made of high quality cast iron. All guideways and bearing surfaces are precisely machined
• Scroll plate is drop forged of fine alloy steel, and carefully case hardened thread flanks are ground on both sides
• The jaw’s teeth and guideways are hardened and fully ground on both sides
• Pinions are hardened and ground

3-Jaw Universal Self-Centering Scroll Chuck/ Two-Pieces Jaws

Principal Dimension-Back Mounting

A [in]	Taper Size	B [in]	B1 [in]	E [in]	F [in]	F1 [in]	Numbers of bolts	G	G1	J [in]	L [in]	Type
6.30	5	3.21	3.40	1.65	-	2.44	3	-	7/16-14	0.63	1.69	3215-6"-5

Over 50 years of Quality European Manufacturing have made BISON the number one choice for Steel and Semi Steel Manual Lathe Chucks. Whether scroll, independent or collet, these chucks have been replacing their competitors for the last 30 years without sacrificing production.

The value of Bison Chucks is not just their exceptional price but also European craftsmanship, made to international specifications, accompanied by an ease of maintenance.

Offered with direct spindle mounting or special application back plates the easy installation of Bison is recognized and appreciated throughout the industry. All parts are manufactured and assembled in the same plant for consistent repeatability in material and workmanship. Spare parts and jaw options are readily available which eliminates excessive downtime for new product conversions and standard maintenance

Technical Data