Help choose Ind 4-jaw chuck for 1440GT, please

[oregontripper]

D1-5 is a must. Would like to maintain 2" bore, besides PMs 8" is not available (and it's under 2").

Planned for rifle barrel and action work.
Things I wonder about.

Two piece jaws or solid?

Any reason to consider 10" over 8"?

Semi-steel?

Would go over $1000, or not! WTH, it's only money.

Store brand $400? Gator $600?

Bison $900? Not Chinese, a definite preference.

 

[oregontripper]

Seems to be all I can type above while actually viewing..


Like to say thanks in advance for any help.

 

[Janderso]

10” D1-5 chucks are heavy!
If it were me, I’d go with the 8”
I’m sure someone will say the ten is better. I’m getting old
I have a 10” Bison that has the T slots. Single jaws
Very nice chuck

 

[mksj]

A few of us have gone with an 8" combination chuck (Bison) which is a bit quicker to get parts in/out and dial in. They are heavy (80lbs with back plate). Recent experiences by other with the Gator chucks have been disappointing in the fit/finish for the price, they are direct copies of the Bison but made in China. Helped another 1440GT owner setup his lathe and he was able to get a Bison 10" 4J with 2 piece jaws (eBay was 1/2 off, list wass 2K) and he was very happy with it. Weight is an issue, a direct mount D1-5 10" 4J are around 65 lbs. I like the Bison/TMX (2 separate companies in Poland, both make nice chucks), two piece jaws allow the use of soft jaws. This eBay listing may be worth looking at, it may be a Bison copy, but Rapidhold chucks when I checked were from Mainland China. Still looks well made , the chuck is semi-steel so limited to 1500 RPM Max. A 10" has a larger center hole, one reason a few people go with the larger chuck. Chuck prices have gone up quite a bit over the last year, also many chucks are outsourced to China mainland, and/or they have spin offs that are lower quality (Like PBA now sells Atlas chucks which is a low cost line).

New Rapidhold 10" 4-Jaw Independent Semi-Steel Lathe Chuck D1-5 Mount 2pc jaws | eBay

Find many great new & used options and get the best deals for New Rapidhold 10" 4-Jaw Independent Semi-Steel Lathe Chuck D1-5 Mount 2pc jaws at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[oregontripper]

Liking this. Gulp. A plus is less depth than a semi-steel. Is this the one?

Bison 8" 4-Jaw Incependent Forged Steel Chucks - D1-5 Mount

Bison quality precision 4-jaw forged steel independent chucks, D type spindle mounts.

bisonchucksonline.com

 

[JR49]

Why are semi steel chucks limited to 1500 RPM?

 

[Aukai]

Vibration, and disintegration?

 

[mksj]

Semi steel is basically cast iron, the centrifugal force exerts significant force and they can spin apart more easily then a forged steel. That being said, I wouldn't want to be spinning a 10" chuck above 1500 RPM. An 8" semi steel typically can be run to 2000 RPM, a forged steel to 2500 RPM. You pay a significant premium for forged steel and you need to factor in if you need the extra top end for a manual lathe. There are also significant other issues with the quality of the castings, and the balance of the chuck. On a lighter lathe they can produce some significant vibrations.
Bison 8" 4J in forged steel with 2 piece through hole 1.97" jaws 7-857-0835F

Bison 8" 4 Jaw Independent Manual Chuck D1-5 Mount 7-857-0835F

Bison 8" 4 Jaw Independent Manual Chuck D1-5 Mount 7-857-0835F

www.smalltools.com

Bison 10" 4J in forged steel with 2 piece jaws through hole 2.55" 7-857-1035F

Bison 10" 4 Jaw Independent Manual Chuck D1-5 Mount 7-857-1035F

Bison 10" 4 Jaw Independent Manual Chuck D1-5 Mount 7-857-1035F

www.smalltools.com

A couple of years ago one company was liquidation stock of their Bison 8" combination chucks, they were the forged steel version and they were like $650 a piece and they had 5 in stock. Once word got out they all sold in about a day. They list for 3X more. You can save some change and use a Gator back plate with these.
Bison 8" 4 Jaw Combination Semi Steel Manual Chuck Plain Back through hole is 2.17" 7-848-0800

Bison 8" 4 Jaw Combination Manual Chuck Plain Back 7-848-0800

Bison 8" 4 Jaw Combination Manual Chuck Plain Back 7-848-0800

www.smalltools.com

 

[wrmiller]

That being said, I wouldn't want to be spinning a 10" chuck above 1500 RPM.

You should have seen me back up the first time I spun my 8" PB chuck at 1800 rpm!

Pretty impressive. Smooth too. I'm not sure I would have done that with a 10" though.

 

[oregontripper]

Thanks guys. Much appreciated!


That 8" Bison 7-857-0835F looks perfect... Like the rest of this affair, I'm in deep... LOL