FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Barta David Alan   2. Issuer Name and Ticker or Trading Symbol REGAL BELOIT CORP [RBC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Vice President CFO (Last) (First) (Middle) 200 STATE STREET 3. Date of Earliest Transaction (Month/Day/Year) 05/12/2010 (Street) BELOIT, WI 53511 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/12/2010   M   10,000 A $ 42.28 30,039 D   Common Stock 05/12/2010   M   15,000 A $ 48.05 45,039 D   Common Stock 05/12/2010   M   20,000 A $ 36.36 65,039 D   Common Stock 05/12/2010   M   10,000 A $ 29.75 75,039 D   Common Stock 05/12/2010   S   21,408 D $ 64.9429 (3) 53,631 D   Common Stock 05/12/2010   F   17,595 D $ 64.99 36,036 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Appreciation Rights

$ 42.28

05/12/2010

M

10,000

05/02/2010

05/02/2018

Common Stock

10,000

$ 0

15,000

D

Non-Qualified Stock Option

$ 29.75

05/12/2010

M

10,000

01/21/2005(2)

01/21/2015

Common Stock

10,000

$ 0

0

D

Non-Qualified Stock Option

$ 36.36

05/12/2010

M

20,000

01/27/2008

01/27/2016

Common Stock

20,000

$ 0

5,000

D

Stock Appreciation Rights

$ 48.05

05/12/2010

M

15,000

02/06/2009

02/06/2017

Common Stock

15,000

$ 0

10,000

D

Stock Appreciation Rights

$ 42.65

05/08/2011(1)

05/08/2019

Common Stock

25,000

25,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Barta David Alan 200 STATE STREET BELOIT, WI 53511			Vice President CFO

Signatures

/s/ David A. Barta		05/14/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Granted as stock-settled SARs under the 2007 Equity Incentive Plan. The SARs vest and becoome exercisable 40% on the second anniversary of the date of grant, 60% on third anniversary, 80% on fourth anniversary and 100% on fifth anniversary.
(2)	Full vested stock options.
(3)	The Price in Column 4 is a weighted average price. The prices actually received ranged from $64.77 to $65.11. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transaction reported in this Form 4 utilizing an average weighted price.

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